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A mathematical model of the gravitational potential of the planet taking into account tidal deformations 考虑到潮汐变形的行星重力势能数学模型
Pub Date : 2024-04-10 DOI: 10.32362/2500-316x-2024-12-2-77-89
А. V. Shatina, A. S. Borets
Objectives. This paper investigates the gravitational potential of a viscoelastic planet moving in the gravitational field of a massive attracting center (star), a satellite and one or more other planets moving in Keplerian elliptical orbits relative to the attracting center. Celestial bodies other than a viscoelastic planet are modeled by material points. Within the framework of the linear model of the theory of viscoelasticity, the problem of finding the vector of elastic displacement has been resolved. Traditionally, a solid body model is used to determine the Earth’s gravitational field, while tidal deformations are taken into account in the form of small corrections to the coefficients of the geopotential model. In this work, the viscoelastic ball model is used to take into account tidal effects. The relevance of the research topic is associated with high-precision forecasting of the movement of artificial satellites of the Earth, high-precision measurement of the Earth’s gravitational field.Methods. In this study the asymptotic and analytical methods developed by V.G. Vilke are used for mechanical systems containing viscoelastic elements of high rigidity, as well as methods of classical mechanics, mathematical analysis. The graphs were plotted using the Octave mathematical package.Results. After resolving the quasi-static problem of elasticity theory by calculating triple integrals over a spherical area, a formula for the gravitational potential of a deformable planet was obtained. In addition, the gravitational potential of the Earth was also calculated taking into account solid-state tidal effects from the Moon, Sun, and Venus at an external point. Graphs were constructed to show the dependence of the Earth’s gravitational potential on time.Conclusions. The theoretical and numerical results established herein show that the main contribution to the gravitational potential of the Earth is made by the Moon and the Sun. The influence of other planets in the solar system is small. The value of the gravitational potential at the outer point of the Earth, taking into account tidal effects, depends both on the position of the point in the moving coordinate system and on the relative position of celestial bodies.
研究目的本文研究了一颗在大质量吸引中心(恒星)引力场中运动的粘弹性行星、一颗卫星和一颗或多颗相对于吸引中心在开普勒椭圆轨道上运动的其他行星的引力势能。粘弹性行星以外的天体由物质点建模。在粘弹性理论的线性模型框架内,已经解决了寻找弹性位移矢量的问题。传统上,使用固体模型来确定地球重力场,而潮汐变形则以对位势模型系数进行微小修正的形式加以考虑。在这项工作中,粘弹性球模型被用来考虑潮汐效应。该研究课题与地球人造卫星运动的高精度预报、地球重力场的高精度测量有关。在这项研究中,V.G. Vilke 开发的渐近和分析方法被用于包含高刚度粘弹性元素的机械系统,以及经典力学和数学分析方法。图表使用 Octave 数学软件包绘制。通过计算球形区域的三重积分,解决了弹性理论的准静态问题,从而获得了可变形行星的重力势能公式。此外,考虑到月球、太阳和金星在外部点的固态潮汐效应,还计算了地球的重力势能。绘制的图表显示了地球引力势与时间的关系。本文建立的理论和数值结果表明,对地球引力势能的主要贡献来自月球和太阳。太阳系中其他行星的影响很小。考虑到潮汐效应,地球外围点的引力势能值既取决于该点在运动坐标系中的位置,也取决于天体的相对位置。
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引用次数: 0
Study of the probabilistic and temporal characteristics of wireless networks using the CSMA/CA access method 使用 CSMA/CA 接入方法研究无线网络的概率和时间特性
Pub Date : 2024-04-10 DOI: 10.32362/2500-316x-2024-12-2-67-76
А. S. Leontyev, D. V. Zhmatov
Objectives. The aim of this study is to develop analytical methods to evaluate the probabilistic and temporal characteristics and performance of wireless networks using the CSMA/CA access method. These methods enable the process of selecting rational operating modes to be automated and the impact of collisions in networks implementing the 802.11 protocols to be reduced.Methods. The methods employed herein include reliability theory, theory of random processes, queuing theory, and the Laplace–Stieltjes transform.Results. A problem statement is presented and developed, along with an analytical method for evaluating the probabilistic and temporal characteristics and performance of wireless networks using the CSMA/CA access method. This method considers time constraints on information transmission, thus expanding the applicability of previously proposed analytical approaches for studying Ethernet local area networks. The analysis of networks that use the CSMA/CA access method was carried out. An original mathematical model was developed that allows evaluating various characteristics of packet transmission processes in wireless networks under time constraints on the transmission. These characteristics include latency, packet transfer time, node load, and network performance. A software package was developed to simplify the analysis and evaluation of various operation modes of wireless networks using the CSMA/CA access method.Conclusions. We demonstrate the need for developing nested analytical models describing packet transmission processes in wireless networks under time constraints on link-layer transmission. This implies the development of more complex models for more exact description of packet transmission processes in such networks. The software package developed herein enables the various options for the functioning of the network to be studied and analytical calculations to be performed. Calculations were carried out, in order to assess the probabilistic and temporal characteristics of packet transmission processes and the wireless network performance. The research involved varying the number of workstations and the intensity of packet flows entering the network nodes under the time constraint on packet transmission. The application of the developed mathematical models will be useful in creating and optimizing wireless networks such as Wi-Fi networks, networks based on the IEEE 802.11 standard, and other data transmission systems using the CSMA/CA access method. Such models and the analysis based on them will be useful in optimizing network performance, adjusting parameters, as well as selecting the capacity and configuration of wireless networks.
研究目的本研究旨在开发分析方法,以评估使用 CSMA/CA 接入方法的无线网络的概率和时间特性及性能。通过这些方法,可以自动选择合理的运行模式,并减少 802.11 协议网络中碰撞的影响。本文采用的方法包括可靠性理论、随机过程理论、队列理论和拉普拉斯-斯蒂尔杰斯变换。本文提出并开发了一个问题陈述以及一种分析方法,用于评估使用 CSMA/CA 接入方法的无线网络的概率和时间特性及性能。该方法考虑了信息传输的时间限制,从而扩大了以前提出的以太网局域网分析方法的适用范围。对使用 CSMA/CA 接入方法的网络进行了分析。我们建立了一个独创的数学模型,可以评估无线网络中数据包传输过程在传输时间限制下的各种特征。这些特征包括延迟、数据包传输时间、节点负载和网络性能。我们还开发了一个软件包,以简化对使用 CSMA/CA 接入方法的无线网络各种运行模式的分析和评估。我们证明了在链路层传输时间受限的情况下,开发嵌套分析模型描述无线网络中数据包传输过程的必要性。这意味着需要开发更复杂的模型,以更精确地描述此类网络中的数据包传输过程。本文开发的软件包可以研究网络运行的各种选项,并进行分析计算。计算的目的是评估数据包传输过程的概率和时间特性以及无线网络的性能。研究涉及在数据包传输的时间限制下,改变工作站的数量和进入网络节点的数据包流量强度。应用所开发的数学模型将有助于创建和优化无线网络,如 Wi-Fi 网络、基于 IEEE 802.11 标准的网络和其他使用 CSMA/CA 接入方法的数据传输系统。这些模型和基于模型的分析将有助于优化网络性能、调整参数以及选择无线网络的容量和配置。
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引用次数: 0
Mathematical modeling of microwave channels of a semi-active radar homing head 半主动雷达寻的头微波通道数学建模
Pub Date : 2024-04-08 DOI: 10.32362/2500-316x-2024-12-2-48-56
N. М. Legkiy, I. V. Unchenko
Objectives. Radar homing heads of guided missiles form a large group of radars which differ from other radars due to their specific purpose. The advantages of a semi-active radar homing head (SARH) include the ability to have a powerful irradiator at the command post and, as a result, a powerful reflected signal from the target. This results in an increase in the range of its detection and guidance. The absence of an emitter simplifies the missile’s onboard control equipment, reduces its weight and dimensions, thereby improving its maneuverability and increasing the guidance accuracy, resulting in the greatest distribution of this type of SARH. However, in order to determine the exact Doppler shift of the target signal as part of SARH, a reference signal with a frequency coinciding with the illumination transmitter signal must be supplied to the receiving path. This study aims to synthesize and analyze the SARH receiver circuit with improved accuracy characteristics.Methods. The following methods are used: statistical radio engineering; optimal signal reception theories; and computer modeling in CAD AWR Design Environment.Results. A mathematical model of the SARH receiver was obtained and analyzed. The proposed receiver model allows the spectral characteristics of signals to be calculated at any point of the microwave paths, as well as signal characteristics at the input of the head channel, at the output of the first conversion mixer, at the output of the first intermediate frequency selector, and at the output of the receiving path. The calculated values of the main characteristics of high-frequency channels are also given.Conclusions. The resulting model allows the frequency dependencies of main parameters of the receiving path, such as the gain factor, noise factor, decibel compression points, and third-order intermodulation intercept points to be estimated. The values obtained during the simulation are maximally close to existing systems, since the models of real-life and mass-used microcircuits thu created are used as the main elements when designing high- frequency paths. The model can be used to study methods of improving technical indicators, as well as to develop new principles and schemes for developing radioelectronic complexes, for example, when designing a receiving path using advanced radio photonics.
目的。制导导弹的雷达寻的定位头是一大类雷达,因其特殊用途而有别于其他雷达。半主动雷达寻的头 (SARH) 的优点包括在指挥所能有一个强大的照射器,因此能从目标发出强大的反射信号。这就增加了其探测和制导范围。没有发射器简化了导弹的机载控制设备,减少了重量和尺寸,从而提高了导弹的机动性和制导精度,使这类 SARH 的分布范围最大。然而,为了确定作为 SARH 一部分的目标信号的确切多普勒频移,必须向接收路径提供与照明发射器信号频率一致的参考信号。本研究旨在合成和分析具有更高精度特性的 SARH 接收机电路。采用了以下方法:无线电统计工程学;最佳信号接收理论;CAD AWR 设计环境中的计算机建模。获得并分析了 SARH 接收机的数学模型。所提出的接收机模型可计算微波路径任意点的信号频谱特性,以及头部通道输入端、第一转换混频器输出端、第一中间频率选择器输出端和接收路径输出端的信号特性。此外,还给出了高频通道主要特征的计算值。由此产生的模型可估算出接收路径主要参数的频率相关性,如增益系数、噪声系数、分贝压缩点和三阶互调截获点。模拟过程中获得的数值最大限度地接近现有系统,因为在设计高频路径时,所创建的现实生活中大量使用的微电路模型是主要元素。该模型可用于研究改进技术指标的方法,以及开发无线电电子综合体的新原理和方案,例如,在使用先进的无线电光子技术设计接收路径时。
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引用次数: 0
Magnetorefractive effect in metallic Co/Pt nanostructures 金属 Co/Pt 纳米结构中的磁折射效应
Pub Date : 2024-04-08 DOI: 10.32362/2500-316x-2024-12-2-57-66
А. N. Yurasov, D. A. Sayfulina, Т. N. Bakhvalova
Objectives. To carry out a theoretical investigation of the features of magnetorefractive effect for metal-to-metal nanostructures. This study uses the example of multilayer Co/Pt nanostructures (ferromagnetic metal–paramagnetic metal) with a different ratio of ferromagnetic and paramagnetic phases in the visible and near-infrared (IR) spectral regions.Methods. The dependence was expressed explicitly using the basic formulas for permittivity, refraction and extinction coefficients, and optical conductivity. This then confirms the common nature of these two effects. The magnetorefractive effect for s-polarization of light was calculated using Fresnel formulas for a three-layer structure. This took into account the thickness of the samples and the influence of the substrate. Effective medium methods were used to calculate the dielectric permittivity of materials. Since the average range of cobalt concentrations was being studied, the Bruggeman approximation was used to establish the effective permittivity of nanostructures. The reflection coefficient at normal incidence was calculated for all nanostructures.Results. Since the permittivity of inhomogeneous samples was replaced by a common effective parameter depending on the permittivity of each component, we were able to apply the Drude–Lorentz theory for conductors in a high-frequency alternating field and then estimate the parameters of the electronic structure of the samples being studied. Plasma and relaxation frequencies were calculated for each sample. This made it possible for the number of free electrons to be estimated and scattering in nanostructures to be investigated.Conclusions. It was shown that Langmuir shielding can be observed in the given energy range in the IR region of the spectrum. The calculated values correlate well with the experimental data.
研究目的对金属-金属纳米结构的磁折射效应特征进行理论研究。本研究以多层 Co/Pt 纳米结构(铁磁金属-顺磁金属)为例,在可见光和近红外(IR)光谱区域,铁磁相和顺磁相的比例各不相同。利用介电常数、折射率、消光系数和光导率的基本公式,明确表达了它们之间的依存关系。这就证实了这两种效应的共同性质。使用菲涅尔公式计算了三层结构的 s 偏振光的磁折射效应。这考虑到了样品的厚度和基底的影响。使用有效介质方法计算了材料的介电常数。由于研究的是钴浓度的平均范围,因此采用了布鲁格曼近似法来确定纳米结构的有效介电系数。计算了所有纳米结构在正常入射时的反射系数。由于非均质样品的介电常数被一个取决于各成分介电常数的共同有效参数所取代,我们能够在高频交变磁场中应用导体的德鲁德-洛伦兹理论,然后估算出所研究样品的电子结构参数。我们计算出了每个样品的等离子体频率和弛豫频率。这使得估算自由电子数量和研究纳米结构中的散射成为可能。研究表明,在光谱的红外区域的给定能量范围内可以观察到朗姆屏蔽。计算值与实验数据相关性良好。
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引用次数: 0
Diagnostics of structural integrity violations of avionics during impact tests 在冲击试验中诊断航空电子设备结构完整性受损情况
Pub Date : 2024-04-05 DOI: 10.32362/2500-316x-2024-12-2-28-38
S. Uvaysov, A. V. Dolmatov, Th. H. Vo, N. T. Luu, C. D. Nguyen
Objectives. With the continuous development of modern radio equipment in the field of aviation and space instrumentation, the requirements for accuracy, stability, and reliability of electronic equipment operated on spacecraft are also on the increase. Spacecraft avionic units (SAU) operate under special conditions and malfunctions, as a rule, are impossible to repair. SAU are hermetically sealed structures, making it difficult to assess their technical condition. The aim of this study is to increase the efficiency and reliability of detecting latent defects in SAU using the diagnostic method involving exposure to mechanical shocks.Methods. Based on known methods, a new diagnostic method is proposed which simulates mechanical processes under shock effects at the design stage. The aim is to evaluate the presence of various latent defects in SAU. In a serviceable state, the amplitude-frequency characteristics (frequency response) of SAU differ from the frequency response of SAU with defects which affect mechanical characteristics. It was for this reason that the diagnostic model of evaluating the technical condition of SAU without removal of devices was developed.Results. This work simulates the mechanical processes in SAU in a serviceable state in the presence of a variety of defect. It also involves experimental studies of mechanical characteristics in both serviceable and faulty states. After measuring the mechanical characteristics under the impact of shock loads, the data obtained is compared with simulation results in the presence of various defects. The comparison result is a report on the technical condition of SAU.Conclusions. The method of diagnosing SAU under mechanical shock impact enhances the efficiency of diagnosing latent defects during the production and operation of SAU.
目的。随着航空和航天仪器领域现代无线电设备的不断发展,对航天器上运行的电子设备的精度、稳定性和可靠性的要求也在不断提高。航天器航空电子设备(SAU)在特殊条件下运行,出现故障通常无法修复。SAU 是密封结构,因此很难评估其技术状况。本研究的目的是提高使用机械冲击诊断法检测 SAU 潜在缺陷的效率和可靠性。在已知方法的基础上,提出了一种新的诊断方法,即在设计阶段模拟冲击作用下的机械过程。目的是评估 SAU 中是否存在各种潜在缺陷。在可使用状态下,SAU 的幅频特性(频率响应)与存在影响机械特性的缺陷的 SAU 的频率响应不同。因此,我们开发了在不拆除装置的情况下评估 SAU 技术状况的诊断模型。这项工作模拟了存在各种缺陷的 SAU 在可使用状态下的机械过程。此外,还对可使用状态和故障状态下的机械特性进行了实验研究。在测量冲击载荷影响下的机械特性后,将获得的数据与存在各种缺陷时的模拟结果进行比较。比较结果就是 SAU 技术状况报告。在机械冲击下诊断 SAU 的方法提高了在 SAU 生产和运行过程中诊断潜在缺陷的效率。
{"title":"Diagnostics of structural integrity violations of avionics during impact tests","authors":"S. Uvaysov, A. V. Dolmatov, Th. H. Vo, N. T. Luu, C. D. Nguyen","doi":"10.32362/2500-316x-2024-12-2-28-38","DOIUrl":"https://doi.org/10.32362/2500-316x-2024-12-2-28-38","url":null,"abstract":"Objectives. With the continuous development of modern radio equipment in the field of aviation and space instrumentation, the requirements for accuracy, stability, and reliability of electronic equipment operated on spacecraft are also on the increase. Spacecraft avionic units (SAU) operate under special conditions and malfunctions, as a rule, are impossible to repair. SAU are hermetically sealed structures, making it difficult to assess their technical condition. The aim of this study is to increase the efficiency and reliability of detecting latent defects in SAU using the diagnostic method involving exposure to mechanical shocks.Methods. Based on known methods, a new diagnostic method is proposed which simulates mechanical processes under shock effects at the design stage. The aim is to evaluate the presence of various latent defects in SAU. In a serviceable state, the amplitude-frequency characteristics (frequency response) of SAU differ from the frequency response of SAU with defects which affect mechanical characteristics. It was for this reason that the diagnostic model of evaluating the technical condition of SAU without removal of devices was developed.Results. This work simulates the mechanical processes in SAU in a serviceable state in the presence of a variety of defect. It also involves experimental studies of mechanical characteristics in both serviceable and faulty states. After measuring the mechanical characteristics under the impact of shock loads, the data obtained is compared with simulation results in the presence of various defects. The comparison result is a report on the technical condition of SAU.Conclusions. The method of diagnosing SAU under mechanical shock impact enhances the efficiency of diagnosing latent defects during the production and operation of SAU.","PeriodicalId":282368,"journal":{"name":"Russian Technological Journal","volume":"1 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140738766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Methods for analyzing the impact of software changes on objective functions and safety functions 分析软件更改对目标函数和安全函数影响的方法
Pub Date : 2024-04-05 DOI: 10.32362/2500-316x-2024-12-2-7-15
A. А. Legkodumov, B. N. Kozeyev, V. V. Belikov, A. V. Korolkov
Objectives. This paper examines the various approaches to analyzing the impact of software changes, and suggests a new method using function control flows. Impact analysis of software change can require the investment of a lot of time and competence on the part of the expert conducting it. There is no detailed description of methodology for analyzing the impact of changes and it is not established at a legislative level. The proposed method has three aims: reducing the level of requirements for an expert when conducting software research; localizing code areas to establish defects in information protection functions; and reducing the time spent on analyzing the impact of changes.Methods. The study analyzes the common methods for analyzing software changes with a description of their positive and negative sides. The possibility of analyzing changes in the control flow of software functions is considered as an alternative to line-by-line comparison of the full volume of source codes. Represented as tree-shaped graphs, the control flows of different versions of the same software are subject to a merging procedure. The final result is analyzed by an expert from the research organization.Results. The research results of the software change analysis methods are presented with a description of their disadvantages. A description is given of the method for change analysis using function control. This complements existing methods, while eliminating their disadvantages. The study also analyzes the possibility of using this method beyond the tasks defined in the introduction.Conclusions. The use of methods to localize the most vulnerable code sections is considered one of the most promising areas for analyzing change impact. In addition to searching for vulnerable code sections, it is important to evaluate the effectiveness of the control flow comparison method in the analysis of source code when transferred to another code base.
目的。本文探讨了分析软件变更影响的各种方法,并提出了一种使用功能控制流的新方法。软件变更的影响分析可能需要专家投入大量时间和精力。目前还没有关于变更影响分析方法的详细描述,也没有从立法层面加以规定。建议的方法有三个目的:降低对专家进行软件研究时的要求水平;定位代码区域以确定信息保护功能的缺陷;减少分析变更影响所花费的时间。本研究分析了分析软件变更的常用方法,并对其正反两方面进行了说明。研究考虑了分析软件功能控制流变化的可能性,以替代逐行比较全部源代码的方法。同一软件不同版本的控制流以树形图表示,并进行合并处理。最终结果由研究机构的专家进行分析。本文介绍了软件变更分析方法的研究成果,并说明了这些方法的缺点。此外,还介绍了使用功能控制进行变更分析的方法。这是对现有方法的补充,同时消除了其缺点。本研究还分析了在导言中定义的任务之外使用该方法的可能性。使用方法定位最易受影响的代码段被认为是分析变更影响的最有前途的领域之一。除了搜索易受攻击的代码段,评估控制流比较方法在分析源代码转移到另一个代码库时的有效性也很重要。
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引用次数: 0
Analysis of the structural reliability of communication networks supporting protective switching mechanisms for one protected section and one backup section 支持一个保护段和一个备用段保护开关机制的通信网络结构可靠性分析
Pub Date : 2024-04-05 DOI: 10.32362/2500-316x-2024-12-2-39-47
K. Batenkov, A. B. Fokin
Objectives. The service level agreement is an important tool used in building reasonable relations between subscribers and operators of telecommunication networks. This includes the quality of services provided. One key component is reliability as assessed by the availability factor. The most suitable model for assessing the reliability of the service provided is a random graph model based on the service contour. This is the set of technical resources involved in the provision of this service. In this formulation, the assessment of the reliability of the service is based on the reliability of elements which constitute the telecommunications network (graph), nodes (vertices) and communication lines (edges). At the same time, the availability factors of nodes and lines are determined by the design features of the distribution environment, as well as the technical means used to organize them. The purpose of this work is to develop an approach to analyzing the reliability of telecommunication networks which support protective switching mechanisms for one protected and one backup sections.Methods. The following methods are used: theory of random graphs, matrices, probabilities and computer modeling.Results. The elements of the route, both basic and reserving, are divided into three groups. The first indicates permanent unchangeable parts of the paths, the second group identifies the reserved sections, and the third group indicates the reserving sections. At the same time, each of the reserved and reserving sections is formed on the basis of specified preferences. They are usually aimed at increasing the resulting reliability, although other rules may be used. In the case of protective switching schemes for one protected section and one backup sections, a variant of forming routes used for further calculations of the reliability indicator is shown.Conclusions. Using the example of a backbone network, the study shows that the use of protective switching mechanisms for the case of one required transmission route demonstrates a significant increase in reliability, with the exception of the use of protective switching in sections. This is primarily due to the topology features of the network under consideration.
目的。服务水平协议是用户与电信网络运营商之间建立合理关系的重要工具。这包括所提供服务的质量。其中一个关键要素是由可用性系数评估的可靠性。评估所提供服务可靠性的最合适模型是基于服务轮廓的随机图模型。这是指提供该服务所涉及的一组技术资源。在这种模式下,服务可靠性的评估基于构成电信网络(图)、节点(顶点)和通信线路(边)的各要素的可靠性。同时,节点和线路的可用性因素由分配环境的设计特征以及用于组织它们的技术手段决定。这项工作的目的是开发一种方法,用于分析支持保护切换机制的电信网络的可靠性,即一个保护部分和一个备份部分。采用了以下方法:随机图理论、矩阵、概率和计算机建模。线路的基本要素和预留要素分为三组。第一组表示路径中永久不变的部分,第二组表示预留路段,第三组表示预留路段。同时,每个保留和预留路段都是根据特定的偏好形成的。虽然也可以使用其他规则,但它们通常以提高可靠性为目的。在一个保护段和一个备用段的保护性切换方案中,显示了用于进一步计算可靠性指标的路由形成变体。以骨干网为例,研究结果表明,在一条所需传输线路的情况下使用保护性切换机制可显著提高可靠性,但分段使用保护性切换机制的情况除外。这主要是由于所考虑的网络拓扑特征造成的。
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引用次数: 0
Analysis of information flow security using software implementing business logic based on stored database program blocks 利用基于存储数据库程序块的业务逻辑实施软件分析信息流安全
Pub Date : 2024-04-05 DOI: 10.32362/2500-316x-2024-12-2-16-27
A. А. Timakov
Objectives. Verification of software security is typically performed using dynamic and static analysis tools. The corresponding types of analysis do not usually consider the business logic of the software and do not rely on data access control policies. A modern approach to resolving this problem is to implement language-based information flow control. Despite a large amount of research, mechanisms for information flow control in software are not widely used in practice. This is because they are complex and impose increased demands on developers. The aim of the work is to transfer information flow control from the language level to the level of formal verification. This will enable the functions of controlling data integrity and confidentiality in software to be isolated into a separate task, which can be resolved by information security analysts.Methods. The research is based on general formal security methods for computer systems and formal verification methods. The algorithm developed by the author for checking security specifications and resolving security violations uses temporal logic of actions.Results. The technology is presented as a step-by-step approach to resolving specific tasks, including the following: designing a database (DB) for storing and processing sensitive information; analyzing dependencies and identifying relevant sets of program blocks in the DB; generating TLA+ specifications for the identified program blocks; labeling specifications according to global security policy rules and additional constraints; applying the specification verification algorithm, and resolving security violations while providing recommendations for software developers. The procedure also involves analyzing labeled data, in order to control the spread of verified program block output values in external software modules.Conclusions. The technology presented herein does not require developers to include redundant annotations describing security policy rules. The function of analyzing information flows with reference to predefined access restrictions is moved to a separate stage of the software development life cycle.
目的。验证软件安全性通常使用动态和静态分析工具。相应类型的分析通常不考虑软件的业务逻辑,也不依赖数据访问控制策略。解决这一问题的现代方法是实施基于语言的信息流控制。尽管进行了大量研究,但软件中的信息流控制机制在实践中并没有得到广泛应用。这是因为它们非常复杂,对开发人员的要求也越来越高。这项工作的目的是将信息流控制从语言层面转移到形式验证层面。这将使软件中的数据完整性和保密性控制功能分离出来,成为一项单独的任务,由信息安全分析人员解决。研究基于计算机系统的一般形式安全方法和形式验证方法。作者开发的用于检查安全规范和解决安全违规问题的算法使用了时态行动逻辑。该技术以逐步解决具体任务的方式呈现,包括以下内容:设计用于存储和处理敏感信息的数据库(DB);分析依赖关系并确定数据库中的相关程序块集;为确定的程序块生成 TLA+ 规范;根据全局安全策略规则和附加约束对规范进行标注;应用规范验证算法,解决安全违规问题,同时为软件开发人员提供建议。该程序还包括分析标记数据,以控制经过验证的程序块输出值在外部软件模块中的传播。本文介绍的技术不需要开发人员加入描述安全策略规则的多余注释。参照预定义访问限制分析信息流的功能被转移到软件开发生命周期的一个单独阶段。
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引用次数: 0
Control system for noise-resistant electronic speed controller of a brushless electric motor for an unmanned aerial vehicle 无人驾驶飞行器无刷电机抗噪电子速度控制器的控制系统
Pub Date : 2024-02-02 DOI: 10.32362/2500-316x-2024-12-1-80-91
M. V. Parinov, A. N. Yurov, Ya. V. Skitskiy
Objectives. The high demand for unmanned aircraft and their efficiency makes the production of their components a matter of relevance. One of these components is the speed controller of the brushless electric motor of the propeller motor group. At the current time, Russian industry, however, does not mass-produce them. In order to start production, control methods and algorithms for the hardware and software parts of devices of this type are needed. Criteria for selecting the main components also need to be formalized. The aim of this work is to develop a method for the software control of electric motors. This includes block diagrams and invariant algorithms and methods for the calculated selection of parameters of the main microcontroller of the electronic speed controller.Methods. Methods of algorithmization, expert assessments, linear computational processes and experimental studies were used.Results. The paper presents the theoretical basis for controlling the required motors. It proposes a block diagram of the implementation of the controller, and a technique for switching windings when controlling with a trapezoidal signal is proposed. Examples are given in the form of an oscillogram. Based on theoretical research, an invariant algorithmic apparatus was developed for building software for various types of microcontrollers. Block diagrams of all the main modules of the software are also presented. The main ones include: the event switching algorithm; and the main endless loop of the microcontroller. The requirements for microcontrollers to create the various types of speed controllers are formalized herein and presented in the form of a set of mathematical expressions. They enable the number of required peripheral devices and microcontroller ports to be calculated according to the requirements for the microcontroller, as well as the computing power of the core used.Conclusions. Experimental studies show the reliability of the theoretical research presented herein. The results obtained can be used to select the optimal element base and develop software for speed controllers of electric motors of the propellers of unmanned aircraft.
目标。无人驾驶飞机的高需求量和高效率使其部件的生产成为一个重要问题。其中一个部件是螺旋桨电机组中无刷电机的速度控制器。然而,目前俄罗斯工业还没有大规模生产这种产品。为了开始生产,需要为此类设备的硬件和软件部分提供控制方法和算法。选择主要部件的标准也需要正式确定。这项工作的目的是开发一种电动马达的软件控制方法。其中包括方框图和不变算法以及计算选择电子调速器主微控制器参数的方法。采用了算法、专家评估、线性计算过程和实验研究等方法。本文介绍了控制所需电机的理论基础。论文提出了控制器的实现框图,并提出了梯形信号控制时的绕组切换技术。文章以振荡图的形式给出了示例。在理论研究的基础上,开发了一种不变算法装置,用于为各种类型的微控制器构建软件。此外,还介绍了软件所有主要模块的框图。其中主要包括:事件切换算法;微控制器的主要无穷循环。本文将创建各类速度控制器对微控制器的要求正规化,并以一组数学表达式的形式呈现。通过这些表达式,可以根据对微控制器的要求以及所用内核的计算能力,计算出所需外围设备和微控制器端口的数量。实验研究表明,本文介绍的理论研究是可靠的。获得的结果可用于选择最佳元件基础和开发无人驾驶飞机螺旋桨电动马达速度控制器的软件。
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引用次数: 0
Control system for noise-resistant electronic speed controller of a brushless electric motor for an unmanned aerial vehicle 无人驾驶飞行器无刷电机抗噪电子速度控制器的控制系统
Pub Date : 2024-02-02 DOI: 10.32362/2500-316x-2024-12-1-80-91
M. V. Parinov, A. N. Yurov, Ya. V. Skitskiy
Objectives. The high demand for unmanned aircraft and their efficiency makes the production of their components a matter of relevance. One of these components is the speed controller of the brushless electric motor of the propeller motor group. At the current time, Russian industry, however, does not mass-produce them. In order to start production, control methods and algorithms for the hardware and software parts of devices of this type are needed. Criteria for selecting the main components also need to be formalized. The aim of this work is to develop a method for the software control of electric motors. This includes block diagrams and invariant algorithms and methods for the calculated selection of parameters of the main microcontroller of the electronic speed controller.Methods. Methods of algorithmization, expert assessments, linear computational processes and experimental studies were used.Results. The paper presents the theoretical basis for controlling the required motors. It proposes a block diagram of the implementation of the controller, and a technique for switching windings when controlling with a trapezoidal signal is proposed. Examples are given in the form of an oscillogram. Based on theoretical research, an invariant algorithmic apparatus was developed for building software for various types of microcontrollers. Block diagrams of all the main modules of the software are also presented. The main ones include: the event switching algorithm; and the main endless loop of the microcontroller. The requirements for microcontrollers to create the various types of speed controllers are formalized herein and presented in the form of a set of mathematical expressions. They enable the number of required peripheral devices and microcontroller ports to be calculated according to the requirements for the microcontroller, as well as the computing power of the core used.Conclusions. Experimental studies show the reliability of the theoretical research presented herein. The results obtained can be used to select the optimal element base and develop software for speed controllers of electric motors of the propellers of unmanned aircraft.
目标。无人驾驶飞机的高需求量和高效率使其部件的生产成为一个重要问题。其中一个部件是螺旋桨电机组中无刷电机的速度控制器。然而,目前俄罗斯工业还没有大规模生产这种产品。为了开始生产,需要为此类设备的硬件和软件部分提供控制方法和算法。选择主要部件的标准也需要正式确定。这项工作的目的是开发一种电动马达的软件控制方法。其中包括方框图和不变算法以及计算选择电子调速器主微控制器参数的方法。采用了算法、专家评估、线性计算过程和实验研究等方法。本文介绍了控制所需电机的理论基础。论文提出了控制器的实现框图,并提出了梯形信号控制时的绕组切换技术。文章以振荡图的形式给出了示例。在理论研究的基础上,开发了一种不变算法装置,用于为各种类型的微控制器构建软件。此外,还介绍了软件所有主要模块的框图。其中主要包括:事件切换算法;微控制器的主要无穷循环。本文将创建各类速度控制器对微控制器的要求正规化,并以一组数学表达式的形式呈现。通过这些表达式,可以根据对微控制器的要求以及所用内核的计算能力,计算出所需外围设备和微控制器端口的数量。实验研究表明,本文介绍的理论研究是可靠的。获得的结果可用于选择最佳元件基础和开发无人驾驶飞机螺旋桨电动马达速度控制器的软件。
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引用次数: 0
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Russian Technological Journal
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