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2022 26th International Conference on System Theory, Control and Computing (ICSTCC)最新文献

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Guaranteed SLAM - A pure interval approach 保证SLAM -一个纯间隔方法
Pub Date : 2022-10-19 DOI: 10.1109/ICSTCC55426.2022.9931854
Alexandru Codres, B. Codres, A. Stancu
This paper presents a new Simultaneous Localisation And Mapping (SLAM) method which takes into account all measurements provided by a 2D LiDAR sensor and generates a Constraint Satisfaction Problem (CSP). Interval methods are used to solve the CSP in a guaranteed way. The approach proposed in this paper does not make any assumptions about the probability distribution of the measurements and does not require any probabilistic methods for feature detection. The SLAM problem is solved in a guaranteed way by purely using only interval methods.
本文提出了一种新的同时定位和映射(SLAM)方法,该方法考虑了2D激光雷达传感器提供的所有测量数据,并产生了一个约束满足问题(CSP)。采用区间法对CSP进行求解,保证了CSP的稳定性。本文提出的方法不需要对测量值的概率分布做任何假设,也不需要任何概率方法进行特征检测。仅使用区间方法可以保证地解决SLAM问题。
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引用次数: 0
The assessment of class relations importance using enumeration in a graph representation model for key classes detection based on PageRank 基于PageRank的关键类检测的图表示模型中使用枚举来评估类关系的重要性
Pub Date : 2022-10-19 DOI: 10.1109/ICSTCC55426.2022.9931857
Ciprian-Bogdan Chirila, Ioana Sora
Key classes are the most important classes of an object-oriented software system. They are usually described in project documentations or executive summaries representing the backbone of the software system. Key classes are vital in software reengineering tasks especially in the context where poor or no documentation is maintained with the project. Thus, detecting key classes becomes an important issue. Several methods for key classes detection were reported: static code analysis, dynamic code analysis, machine learning. In a static code analysis approach the model of a weighted graph is used to represent the relations between classes like: inheritance, interface realization, field usage, return type usage etc. On the weighted graph model we run a link analysis algorithm to rank the classes in their order of importance, thus detecting the top 20 most important ones. We intend to assess the importance of class relations by generating all possible weights combinations of 0 and 1 for each class relation in the weighted graph construction. We experiment our approach on 14 analyzed systems of different sizes regarding the number of classes and from domains like: games, web servers, utilities, etc.
关键类是面向对象软件系统中最重要的类。它们通常在项目文档或执行摘要中描述,代表软件系统的骨干。关键类在软件再工程任务中是至关重要的,特别是在项目中维护的文档很少或没有文档的情况下。因此,检测密钥类成为一个重要的问题。报告了几种关键类检测方法:静态代码分析,动态代码分析,机器学习。在静态代码分析方法中,加权图模型用于表示类之间的关系,如继承、接口实现、字段使用、返回类型使用等。在加权图模型上,我们运行一个链接分析算法来对类的重要性排序,从而检测出前20个最重要的类。我们打算通过在加权图构造中为每个类关系生成0和1的所有可能的权重组合来评估类关系的重要性。我们在14个不同大小的系统上进行了实验,这些系统涉及的类别数量和领域包括:游戏、web服务器、实用程序等。
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引用次数: 1
Analysis and Qualitative Observability of Two Vapor Compression Cycle Models 两种蒸汽压缩循环模型的分析与定性可观测性
Pub Date : 2022-10-19 DOI: 10.1109/ICSTCC55426.2022.9931863
Ricus Husmann, H. Aschemann
In this paper, a physically-oriented vapor compression cycle model is analyzed regarding different measures of the degree of observability. The high-dimensional nonlinear model employs pressures and enthalpies as state variables and involves two control inputs. A set of equilibrium points is determined over a grid of both input variables, and corresponding Taylor linearizations are performed. After an analysis of the eigenvalue locations, the observability properties are investigated using two alternative approaches: the first is based on the observability Gramians, the second on a stationary Kalman Filter. The analysis of the Gramians provides a deeper insight into the interconnections of states and individual measured outputs, whereas the Kalman Filter indicates the achievable estimation quality which is related to the variances. Moreover, a direct way to include equality constraints related to the overall mass conservation and its impact on the observability is discussed in detail.
本文从可观测度的不同度量出发,分析了一个面向物理的蒸汽压缩循环模型。高维非线性模型采用压力和焓作为状态变量,并包含两个控制输入。在两个输入变量的网格上确定一组平衡点,并执行相应的泰勒线性化。在分析了特征值的位置后,采用两种方法研究了可观测性性质:第一种方法是基于可观测性格兰量,第二种方法是基于平稳卡尔曼滤波器。gramian的分析提供了对状态和单个测量输出的相互联系的更深入的了解,而Kalman滤波器则表明与方差相关的可实现的估计质量。此外,还详细讨论了包含与整体质量守恒相关的等式约束及其对可观测性的影响的直接方法。
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引用次数: 1
Extending a RISC-V Core with a CAN-FD Communication Unit 用CAN-FD通信单元扩展RISC-V核心
Pub Date : 2022-10-19 DOI: 10.1109/ICSTCC55426.2022.9931880
C. Popovici, A. Stan
The last decade brought up the tendency of turning every tool and device around us into a smart, autonomous, interconnected, and interoperable instrument. Autonomous driving initiative is on the verge of introducing self-driving cars with a high level of safety. Aerospace industry delivers products which improves the flight efficiency and safety, helping the pilots take the best decisions. Astronauts are no longer required to go themselves on the Moon and to risk their lives because smart interconnected robots can perform very complex spatial missions. All of these wouldn't be possible without the continuously development of the Embedded Computing. MCUs (Microcontroller Unit) and SoCs (Systems on a Chip) were permanently improved in terms of working frequency, number of processors and fast peripherals. But we reached a point when improving these parameters is not enough and the necessity of application-specific hardware accelerators and algorithms arose. A field of Embedded development which we think is suitable for integrating an application-specific hardware unit is the CAN-FD communication. This paper describes integration of a CAN-FD Communication Unit into an ISA-extended RISC-V Core (RisCanFd CPU) and designing the MCU which embeds it, called RisCanFd. Our design includes also a debugging unit called UartDebugger which eases the development of programms for RisCanFd. For offering a modern development approach, a GUI application called RisCanFd_DebugIDE was written together with a dedicated assembler, RisCanFd_Assembler. This software tool offers both develop and debug perspectives. RisCanFd may be an alternative to using classical microcontrollers with external or internal memory-mapped CAN-FD (Controller Area Network Flexible Data rate) communication peripherals. Our solution is bringing considerable improvement, which will be presented in this paper.
在过去的十年里,把我们周围的每一个工具和设备都变成一个智能的、自主的、相互连接的、可互操作的工具。自动驾驶计划即将推出具有高安全性的自动驾驶汽车。航空航天业提供的产品可以提高飞行效率和安全性,帮助飞行员做出最佳决策。宇航员不再需要亲自前往月球并冒着生命危险,因为智能互联机器人可以执行非常复杂的空间任务。这一切都离不开嵌入式计算的不断发展。mcu(微控制器单元)和soc(片上系统)在工作频率、处理器数量和快速外设方面得到了永久性的改进。但是我们达到了一个点,改进这些参数是不够的,需要特定于应用程序的硬件加速器和算法。我们认为适合集成特定应用硬件单元的嵌入式开发领域是CAN-FD通信。本文介绍了将CAN-FD通信单元集成到isa扩展的RISC-V核心(RisCanFd CPU)中,并设计了嵌入式单片机RisCanFd。我们的设计还包括一个名为UartDebugger的调试单元,它简化了RisCanFd程序的开发。为了提供一种现代的开发方法,一个名为RisCanFd_DebugIDE的GUI应用程序与一个专用的汇编程序RisCanFd_Assembler一起编写。这个软件工具提供了开发和调试的视角。RisCanFd可能是使用带有外部或内部存储器映射CAN-FD(控制器局域网灵活数据速率)通信外设的经典微控制器的替代方案。我们的解决方案带来了相当大的改善,这将在本文中介绍。
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引用次数: 1
Optimal tuning rules for an absolutely stable nonlinear PI controller with a practical application 绝对稳定非线性PI控制器的最优整定规则及实际应用
Pub Date : 2022-10-19 DOI: 10.1109/ICSTCC55426.2022.9931881
Rúul Brenes Astorga, Mercedes Chacón Vásquez
Tuning nonlinear controllers which can be easily implemented in real-time applications is a challenging task since stability in the controlled loop has to be guaranteed. In this work, a set of new tuning rules for nonlinear PI controllers applied to first-order plus dead time systems is presented. The design method guarantees the asymptotic stability of the control system while providing optimal performance. Moreover, the tuning rules offer good robustness in the presence of process variations and disturbance. This controller is easy to implement and the efficacy of the method is shown through various simulations. Furthermore, the real-time implementation of the tuning rule on a control loop for an airflow process is shown.
由于必须保证被控回路的稳定性,因此在实时应用中容易实现的非线性控制器的整定是一项具有挑战性的任务。本文提出了一套适用于一阶加死区系统的非线性PI控制器的新整定规则。该设计方法在提供最优性能的同时保证了控制系统的渐近稳定。此外,在存在过程变化和干扰的情况下,该调谐规则具有良好的鲁棒性。该控制器易于实现,并通过各种仿真验证了该方法的有效性。此外,还给出了该调谐规则在气流过程控制回路上的实时实现。
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引用次数: 0
Switching control of a rotary inverted pendulum 旋转倒立摆的开关控制
Pub Date : 2022-10-19 DOI: 10.1109/ICSTCC55426.2022.9931817
Boglárka Sütö, Z. Lendek
In this paper we consider the problem of swinging-up and stabilization of a rotary inverted pendulum. We design switching controllers and analyse whether the performance can be improved using more controllers. We optimize both the control gains and the switching points. All the controllers are tested experimentally on a rotary inverted pendulum. Our results indicate that having a large number of switching controllers does not necessarily lead to a performance increase.
本文研究了旋转倒立摆的起摆与镇定问题。我们设计了切换控制器,并分析了使用更多的控制器是否可以提高性能。我们优化了控制增益和开关点。所有控制器都在旋转倒立摆上进行了实验测试。我们的结果表明,拥有大量的切换控制器并不一定会导致性能的提高。
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引用次数: 0
Social Medical Network 社会医疗网络
Pub Date : 2022-10-19 DOI: 10.1109/ICSTCC55426.2022.9931896
L. Stanescu, Raluca Stanescu
The article presents a prototype social media network dedicated to the medical staff of Romania, from the architectural and functional points of view. The medical social media network is implemented as a web application for the time being, followed by the future implementation of a mobile application as well. This network allows for the medical staff in Romania to register, log in and virtually connect, with the purpose of sharing special medical cases or getting advised opinions for setting diagnostics. Any doctor in Romania will be able to create an account, add their information about their medical department/specialty in which they activate, their former studies, obtained diplomas/specializations, former or current occupied positions, resume etc. They will have the possibility to create posts, in the form of text, accompanied by medical images if needed. Oher users will be able to comment on the added posts. Each post or comment is considered a document, stored in the database. One of the most useful functionalities of the web application is the possibility of search - simple, based on the name of a doctor; or advanced - which implies searching in posts and comments using information retrieval algorithms. The web application is based on a MongoDB database, using MongoDB Atlas search, that is an embedded full-text search, build on Apache Lucene. The medical social media network is now in the testing phase, being utilized by a group of doctors from a private clinic in Romania. The feedback gathered from this usage is taken into consideration to improve and further develop the application.
本文从建筑和功能的角度介绍了罗马尼亚医务人员专用的社交媒体网络原型。医疗社交媒体网络目前作为web应用程序实现,未来还将实现移动应用程序。该网络允许罗马尼亚的医务人员注册、登录和虚拟连接,目的是分享特殊医疗病例或获得确定诊断的建议意见。罗马尼亚的任何医生都可以创建一个帐户,添加他们所从事的医疗部门/专业、以前的学习、获得的文凭/专业、以前或现在的职位、简历等信息。他们将有可能以文本的形式创建帖子,并在需要时附上医学图像。其他用户将能够对添加的帖子发表评论。每个帖子或评论都被视为存储在数据库中的文档。web应用程序最有用的功能之一是搜索的可能性——简单,基于医生的名字;或者高级——这意味着使用信息检索算法在帖子和评论中进行搜索。该web应用程序基于MongoDB数据库,使用MongoDB Atlas搜索,这是一个嵌入式全文搜索,构建在Apache Lucene上。医疗社交媒体网络目前处于测试阶段,由罗马尼亚一家私人诊所的一组医生使用。从这种使用中收集到的反馈将被考虑在内,以改进和进一步开发应用程序。
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引用次数: 0
Comparative Study of Predictive Current Control Structures for a Synchronous Reluctance Machine 同步磁阻电机预测电流控制结构的比较研究
Pub Date : 2022-10-19 DOI: 10.1109/ICSTCC55426.2022.9931778
M. Costin, C. Lazar
The synchronous reluctance motor (SynRM), due to its advantages, has been used recently in many applications. In this paper, we propose a comparison of two current control structures for a SynRM based on constrained predictive control algorithms to analyze the performance of each algorithm. The first structure starts from the V -canonical model of the $dq$ current system, and then, using a decoupling controller, two single-input single-output (SISO) decoupled systems result, each being controlled with a SISO constrained predictive control algorithm. The second one uses a multi-input multi-output (MIMO) state-space model of the $dq$ current system for which a constrained MIMO predictive control algorithm is designed. For a better evaluation of the proposed predictive controllers with constraints of the two current control structures, a comparative investigation of these predictive control techniques was performed using the Matlab-Simulink environment. For the performance testing, two scenarios were considered that included both input and output constraints and a set of performance indices.
同步磁阻电动机(SynRM)由于其自身的优点,近年来得到了广泛的应用。在本文中,我们提出了基于约束预测控制算法的SynRM的两种当前控制结构的比较,以分析每种算法的性能。第一个结构从$dq$电流系统的V -规范模型出发,然后使用解耦控制器得到两个单输入单输出(SISO)解耦系统,每个系统都使用SISO约束预测控制算法进行控制。第二部分采用多输入多输出(MIMO)状态空间模型,设计了约束MIMO预测控制算法。为了更好地评估所提出的具有两种当前控制结构约束的预测控制器,使用Matlab-Simulink环境对这些预测控制技术进行了比较研究。对于性能测试,考虑了两种场景,其中包括输入和输出约束以及一组性能指标。
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引用次数: 0
Improving the Accuracy of Object Detection Models using Patch Splitting
Pub Date : 2022-10-19 DOI: 10.1109/ICSTCC55426.2022.9931855
A. Florea, C. Oara
The classification and afterwards also the localization of objects in images were among the initial breakthroughs that stimulated research into artificial neural networks. Improving the detection accuracy along with other metrics has been a continuous research objective and analysis subject. One particular issue during the training of such models is the varying resolution of input images and it's effects on the training/detection results as most models accept arbitrary resolutions and resize them internally to a specific resolution. This article examines the benefits of automatically splitting images into patches before the detection stage and afterwards joining the patches along with the detection results into the original image. An accuracy test is conducted in a real environment.
图像中物体的分类和定位是刺激人工神经网络研究的最初突破之一。提高检测精度和其他指标一直是一个持续的研究目标和分析主题。在训练这些模型的过程中,一个特别的问题是输入图像的不同分辨率,它对训练/检测结果的影响,因为大多数模型接受任意分辨率并在内部将其调整为特定分辨率。本文研究了在检测阶段之前自动将图像分割成小块,然后将这些小块与检测结果一起加入原始图像的好处。在实际环境中进行了精度测试。
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引用次数: 0
A Case Study for Designing a Secure Communication Protocol over a Controller Area Network 控制器局域网安全通信协议设计的实例研究
Pub Date : 2022-10-19 DOI: 10.1109/ICSTCC55426.2022.9931790
Adrian Croitoru, F. Stîngă, Marius Marian
This paper presents a case study for designing and implementing a secure communication protocol over a Controller Area Network (CAN). The CAN based protocol uses a hybrid encryption method on a relatively simple hardware / software environment. Moreover, the blockchain technology is proposed as a working solution to provide an extra secure level of the proposed system.
本文介绍了一个在控制器局域网(CAN)上设计和实现安全通信协议的案例研究。基于CAN的协议在相对简单的硬件/软件环境中使用混合加密方法。此外,区块链技术被提议作为一种工作解决方案,为所提议的系统提供额外的安全级别。
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引用次数: 1
期刊
2022 26th International Conference on System Theory, Control and Computing (ICSTCC)
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