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2016 IEEE/AIAA 35th Digital Avionics Systems Conference (DASC)最新文献

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Design, development and implementation of a UAV flight controller based on a state machine approach using a FPGA embedded system 基于状态机方法的无人机飞行控制器的设计、开发与实现
Pub Date : 2016-09-01 DOI: 10.1109/DASC.2016.7778069
Noé Monterrosa, J. Montoya, Fredy Jarquín, C. Bran
This article presents the development of a fixed-wing UAV flight controller using a complete parallelism embedded system as a FPGA. Many solutions for UAVs flight controllers are based on embedded sequential systems. However, these systems are not perfect. The greater number of processes and tasks being executed simultaneously, the more variables such as precision, speed of response and synchronism may suffer. Our proposed flight controller solves this problem because it is based on a concurrent system and can therefore, execute many processes at the same time. The development of this flight controller represents just one part of the “Drone Bosco” project, where university students from Universidad Don Bosco are constructing the first UAV designed completely in El Salvador. The solution was designed and implemented taking into consideration specific characteristics of other areas of the project such as Radio Control Systems, Power Generation Systems and Aerodynamics. These considerations are outlined in this article. The flight controller is based on a state machine system that migrates from state to state depending on the stimulus received from sensors like accelerometers, tachometers, compass, pitot, GPS, etc. Another feature developed in this project is an emergency system that provides enough intelligence and robustness to secure the integrity of the aircraft in case a problem occurs during missions. Features like high speed of response, adaptable calibration and parallelism are achieved with our solution. Moreover, given that many parameters are generic, it has the flexibility to migrate to other fixed-wing UAVs with different characteristics. A similar approach could be applied in the future for the development of other devices that need navigation controllers with these characteristics, for example rockets or rovers. The results obtained in the simulations and tests of the flight controller system are described in detail in this article.
本文介绍了一种采用完全并行嵌入式系统作为FPGA的固定翼无人机飞行控制器的开发。许多无人机飞行控制器的解决方案都是基于嵌入式顺序系统。然而,这些系统并不完美。同时执行的进程和任务数量越多,精度、响应速度和同步性等变量就会越多。我们提出的飞行控制器解决了这个问题,因为它基于并发系统,因此可以同时执行许多进程。该飞行控制器的开发仅代表了“Drone Bosco”项目的一部分,来自Don Bosco大学的大学生正在建造完全在萨尔瓦多设计的第一架无人机。该解决方案的设计和实施考虑了项目其他领域的具体特点,如无线电控制系统、发电系统和空气动力学。本文概述了这些注意事项。飞行控制器基于一个状态机系统,根据从加速度计、转速计、指南针、皮托管、GPS等传感器接收到的刺激,从一个状态迁移到另一个状态。该项目开发的另一个功能是应急系统,该系统提供足够的智能和鲁棒性,以确保飞机在执行任务期间出现问题时的完整性。该方案具有响应速度快、校准适应性强、并行性好等特点。此外,由于许多参数具有通用性,因此可以灵活地迁移到其他具有不同特性的固定翼无人机上。类似的方法可以应用于未来需要具有这些特性的导航控制器的其他设备的开发,例如火箭或漫游者。本文对飞行控制系统的仿真和试验结果进行了详细的描述。
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引用次数: 8
Flight awareness collaboration tool development 飞行感知协作工具开发
Pub Date : 2016-09-01 DOI: 10.1109/DASC.2016.7778038
R. Mogford, Dan Peknik, Aaron Duley, Cody Evans, Lionel Delmo, Christian Amalu
NASA is developing the Flight Awareness Collaboration Tool (FACT) to support airline and airport operations during winter storms. The goal is to reduce flight delays and cancellations due to winter weather. FACT concentrates relevant information from the Internet and Federal Aviation Administration on one screen for easy access. It provides collaboration tools for those managing the winter weather event including the airline operations center, airport authority, the air traffic control tower, and de-icing operators. We have formed a user team from an affected airport to guide the design and evaluate the Web-based prototype. Future work includes adding predictive capabilities, conducting a simulation to test FACT in a realistic environment, and evaluating the tool in an operational environment.
NASA正在开发飞行意识协作工具(FACT),以支持航空公司和机场在冬季风暴期间的运营。其目标是减少由于冬季天气造成的航班延误和取消。FACT将来自互联网和联邦航空管理局的相关信息集中在一个屏幕上,以便于访问。它为管理冬季天气事件的人员提供协作工具,包括航空公司运营中心、机场管理局、空中交通管制塔和除冰操作员。我们已经从一个受影响的机场组成了一个用户团队来指导设计和评估基于web的原型。未来的工作包括增加预测功能,在现实环境中进行模拟测试FACT,并在操作环境中评估该工具。
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引用次数: 0
Deriving verification-related means of compliance for a model-based testing process 为基于模型的测试过程导出与验证相关的遵从性方法
Pub Date : 2016-09-01 DOI: 10.1109/DASC.2016.7778046
B. Gallina, A. Andrews
DO-331 is the supplement of DO-178C for model-based development. DO-331 is an objective-based guidance, which defines a set of objectives that have to be achieved for the model-based development of aeronautical software. The guidance also recommends the evidence in terms of activities and work products that should respectively be carried out and produced to meet the objectives. To explain why the evidence collected supports the claims concerning objectives achievement, manufacturers could adopt a safety case-based approach. Fail-SafeMBT is an academic, recently proposed, and potentially innovative model-based testing process, which needs compelling arguments to be adopted for the development of aeronautical software. To reduce the gap between industrial settings and academic settings, in this paper, we adopt the safety case-based approach and we explain how to semi-automatically derive means for compliance, aimed at arguing Fail-SafeMBT's compliance. Our focus is limited to the Verification Planning Process and we contribute to partially justify the adequacy of Fail-SafeMBT to act as process evidence by creating fragments of compelling arguments. To do that, we first manually check if Fail-SafeMBT includes DO-178C/DO-331-compliant process elements, then we model Fail-SafeMBT in compliance with Software Process Engineering Meta-model 2.0, then, we derive process-based arguments from the Fail-SafeMBT process model by using MDSafeCer, the recently introduced Model Driven Safety Certification method. By doing so, we provide a threefold contribution: we pioneer the interpretation of DO-331 in academic settings, we validate MDSafeCer in the avionics domain and we strengthen Fail-SafeMBT by providing suggestions aimed at increasing its maturity level.
DO-331是DO-178C的补充,用于基于模型的开发。DO-331是一个基于目标的指南,它定义了一组必须实现的航空软件基于模型开发的目标。该指南还就为实现这些目标而应分别开展和产生的活动和工作产品提出了证据。为了解释为什么收集的证据支持有关目标实现的声明,制造商可以采用基于安全案例的方法。Fail-SafeMBT是一个学术性的,最近被提出的,具有潜在创新性的基于模型的测试过程,需要在航空软件的开发中采用令人信服的论据。为了减少工业环境和学术环境之间的差距,在本文中,我们采用了基于安全案例的方法,并解释了如何半自动地推导合规手段,旨在论证Fail-SafeMBT的合规性。我们的重点仅限于验证计划过程,我们通过创建令人信服的论据片段来部分证明Fail-SafeMBT作为过程证据的充分性。为此,我们首先手动检查Fail-SafeMBT是否包含符合do - 178c / do -331的过程元素,然后根据软件过程工程元模型2.0对Fail-SafeMBT进行建模,然后,我们使用MDSafeCer(最近引入的模型驱动安全认证方法)从Fail-SafeMBT过程模型中导出基于过程的参数。通过这样做,我们提供了三方面的贡献:我们在学术环境中率先解释了DO-331,我们在航空电子领域验证了MDSafeCer,我们通过提供旨在提高其成熟度的建议来加强Fail-SafeMBT。
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引用次数: 10
Feasibility analysis of wearables for use by airline crew 航空机组人员使用可穿戴设备的可行性分析
Pub Date : 2016-09-01 DOI: 10.1109/DASC.2016.7778023
Stefan Manuel Neis, Melissa Irene Blackstun
Jeppesen GmbH is researching new communication and interaction systems for the next generation flight deck. One such opportunity is the determination of use cases for wearable technology in support of airline personnel. Key attributes of wearables, pertinent to the ongoing research efforts, include mobility, persistence, ability to be proactive, and context awareness. Wearables also enable hands-free use. The current study attempts to exploit these characteristics to determine their efficacy in the flight deck. The study used a Sony SmartWatch 3 to test two identified use-cases for wearables by delivering Air Traffic Control commands and other flight relevant information graphically and textually to pilots while conducting flights in a simulator setting. These trials were compared with the delivery of the same information via traditional voice instructions and the Controller-Pilot Data Link Communications screen as is integrated in a Boeing 787 auxiliary panel, next to the Primary Flight Display. A preliminary symbology for Air Traffic Control instructions was developed. In the first experiment, instructions depicted on the SmartWatch were evaluated for subjective usability, subjective workload, performance, and effect on pilot situation awareness. In the study, performance was determined by response time, detection of intentionally placed anomalies in, and the correct execution of Air Traffic Control instructions. Performance from instructions displayed graphically and textually on the SmartWatch was not significantly different than on the datalink communications screen. The three aforementioned methods, however, significantly improved response times in comparison with voice communication with Air Traffic Control. The study also determined that a smartwatch is not preferred by pilots for delivering textual Air Traffic Control commands due to the added workload of turning the wrist to view Air Traffic Control messages. In a second experiment, flight-relevant information was provided on the SmartWatch, such as live field winds and Minimum Equipment List items, in reduced visibility, terminal area operations to test acceptance by pilots. This information was considered useful by pilots. Further research needs to be conducted to understand the interactions between information type, information delivery method, and the effects on pilot acceptance. Additional findings of the two-part study include the preference of graphical data over textual information, and for live field winds to be displayed in field of view, when field winds affect the target threshold speed. The implications of this work are two-fold. Firstly, future research should be conducted to expand on and test the identified use cases of wearables in the aviation industry. Additionally, the representation of Air Traffic Control communications graphically should be investigated on other display areas, e.g. Multi-Functional Display, Head-Up Display, and datalink communication sections on a
Jeppesen公司正在为下一代飞行甲板研究新的通信和交互系统。其中一个机会是确定可穿戴技术的用例,以支持航空公司人员。与正在进行的研究工作相关的可穿戴设备的关键属性包括移动性、持久性、主动性和环境感知能力。可穿戴设备也支持免提使用。目前的研究试图利用这些特性来确定它们在飞行甲板上的功效。该研究使用索尼智能手表3来测试可穿戴设备的两个确定用例,通过在模拟器设置中向飞行员发送空中交通管制命令和其他飞行相关信息。这些试验与通过传统的语音指令和控制器-飞行员数据链通信屏幕传递相同信息进行了比较,该屏幕集成在波音787辅助面板中,位于主飞行显示器旁边。空中交通管制指令的初步符号被开发出来。在第一个实验中,对智能手表上描述的指令进行了主观可用性、主观工作量、性能和对飞行员态势感知的影响的评估。在研究中,性能由响应时间、对故意放置的异常的检测以及正确执行空中交通管制指令决定。在智能手表上以图形和文本方式显示的指令与在数据链通信屏幕上显示的指令的性能没有显著差异。然而,与空中交通管制的语音通信相比,上述三种方法显著改善了响应时间。该研究还确定,飞行员不喜欢使用智能手表发送文本空中交通管制命令,因为转动手腕查看空中交通管制信息会增加工作量。在第二个实验中,在智能手表上提供了与飞行相关的信息,例如现场风和最低设备清单项目,在能见度较低的情况下,终端区域操作以测试飞行员的接受程度。飞行员认为这些信息很有用。需要进一步研究了解信息类型、信息传递方式和对试点接受度的影响之间的相互作用。这项由两部分组成的研究的其他发现包括图形数据优于文本信息,以及当电场风影响目标阈值速度时,在视场中显示实时电场风。这项工作的含义是双重的。首先,未来的研究应该扩展和测试可穿戴设备在航空工业中的使用案例。此外,空中交通管制通信的图形表示应该在其他显示区域进行研究,例如,在主飞行显示器或飞行管理计算机上的多功能显示、平视显示和数据链通信部分。符号需要改进和扩展,以准确地代表更广泛的空中交通管制命令。信息的图形表示应该进一步研究其提高通信效率和减少由于静态、口音和语言障碍造成的模拟无线电和数据链路通信错误的能力。
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引用次数: 9
Probabilistic prediction model of air traffic controllers' sequencing strategy based on pairwise comparisons 基于两两比较的空中交通管制员排序策略概率预测模型
Pub Date : 2016-09-01 DOI: 10.1109/DASC.2016.7777997
Soyeon Jung, Keumjin Lee
Sequencing arrival flights is a major task of air traffic management, and there exist various optimization tools to support the air traffic controllers. It is, however, difficult to employ these tools in the actual operational environments since they lack consideration on the human cognitive process. This paper proposes a new framework to predict the arrival sequences based on a preference learning approach, where we learn the sequence data operated by human controllers. The proposed algorithm works in two-stages: it first learns the pairwise preference functions between arrivals using binomial logistic regression, and then it induces the total sequence for a new set of arrivals by comparing the scores of each aircraft, which are the sums of pairwise preference probabilities. The proposed model is demonstrated with real traffic data at Incheon International Airport and its performance is assessed using the Spearman's rank correlation.
到达航班排序是空中交通管理的一项重要任务,有各种优化工具来支持空中交通管制员。然而,由于缺乏对人类认知过程的考虑,这些工具很难在实际操作环境中使用。本文提出了一种基于偏好学习方法的预测到达序列的新框架,其中我们学习由人类控制器操作的序列数据。所提出的算法分为两个阶段:首先使用二项逻辑回归学习到达者之间的成对偏好函数,然后通过比较每架飞机的得分(即成对偏好概率的总和)归纳出一组新到达者的总序列。用仁川国际机场的真实交通数据验证了所提出的模型,并使用Spearman秩相关对其性能进行了评估。
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引用次数: 1
A reliable system design for nondeterministic adaptive controllers in small UAV autopilots 小型无人机自动驾驶仪不确定性自适应控制器的可靠系统设计
Pub Date : 2016-09-01 DOI: 10.1109/DASC.2016.7778103
K. N. Maleki, K. Ashenayi, L. Hook, Justin G. Fuller, N. Hutchins
Despite the tremendous attention Unmanned Aerial Vehicles (UAVs) have received in recent years for applications in transportation, surveillance, agriculture, and search and rescue, as well as their possible enormous economic impact, UAVs are still banned from fully autonomous commercial flights. One of the main reasons for this is the safety of the flight. Traditionally, pilots control the aircraft when complex situations emerge that even advanced autopilots are not able to manage. Artificial Intelligence based methods and Adaptive Controllers have proven themselves to be efficient in scenarios with uncertainties; however, they also introduce another concern: nondeterminism. This research endeavors to find a solution on how such algorithms can be utilized with higher reliability. Our method is based on using an adaptive model to verify the performance of a control parameter - proposed by a nondeterministic adaptive controller or AI-based optimizer - before it is deployed on the physical platform. Furthermore, a backup mechanism is engaged to recover the drone in case of failure. A Neural Network is employed to model the aircraft, and a Genetic Algorithm is utilized to optimize the PID controller of a quadcopter. The initial experimental results from test flights indicate the feasibility of this method.
尽管近年来无人驾驶飞行器(uav)在运输、监视、农业和搜救方面的应用受到了极大的关注,以及它们可能产生的巨大经济影响,但无人机仍然被禁止进行完全自主的商业飞行。其中一个主要原因是飞行安全。传统上,当复杂的情况出现时,飞行员控制飞机,即使是先进的自动驾驶仪也无法控制。基于人工智能的方法和自适应控制器已被证明在具有不确定性的情况下是有效的;然而,它们也引入了另一个问题:不确定性。本研究试图找到一种解决方案,以提高这些算法的可靠性。我们的方法是基于使用自适应模型来验证控制参数的性能-由不确定性自适应控制器或基于人工智能的优化器提出-在物理平台上部署之前。此外,还采用了备份机制,以便在发生故障时恢复无人机。采用神经网络对飞行器进行建模,利用遗传算法对四轴飞行器的PID控制器进行优化。初步的飞行试验结果表明了该方法的可行性。
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引用次数: 10
Shifting temporal and communicational aspects into design phase via AADL and RTSJ 通过AADL和RTSJ将时间和通信方面转移到设计阶段
Pub Date : 2016-09-01 DOI: 10.1109/DASC.2016.7778056
T. Driessen, B. Bauer
By now, Model-Driven Development is a well-known approach in many domains. By (re)using standardized domain-specific models, productivity is increased and common errors are simultanously avoided. The Architecture Analysis and Design Language is a domain-specific modeling language for embedded, real-time and safety-critical systems. In our approach we utilize this modeling language, with its well-defined semantics, as source language for a mapping into real-time Java. The chosen subset of model elements enables system designers to create a system and subsequently generate a code framework that complies to the model in terms of structure, timing and communicational restrictions. In order to demonstrate the benefits of our approach, we model and generate the code framework for an existing autopilot and compare our results with the original software.
到目前为止,模型驱动开发在许多领域都是一种众所周知的方法。通过(重新)使用标准化的领域特定模型,提高了生产率,同时避免了常见的错误。体系结构分析和设计语言是一种领域特定的建模语言,用于嵌入式、实时和安全关键系统。在我们的方法中,我们利用这种具有良好定义语义的建模语言作为映射到实时Java的源语言。所选择的模型元素子集使系统设计者能够创建一个系统,并随后生成一个在结构、时间和通信限制方面符合模型的代码框架。为了证明我们的方法的好处,我们为现有的自动驾驶仪建模并生成代码框架,并将我们的结果与原始软件进行比较。
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引用次数: 0
Validating an ATM security prototype — First results 验证ATM安全原型-第一个结果
Pub Date : 2016-09-01 DOI: 10.1109/DASC.2016.7778107
T. Stelkens-Kobsch, M. Finke, Matthias Kleinert, M. Schaper
Since years it is known that radio communication used by ATC can easily be intruded and is therefore subject to recurrent attacks. Nevertheless the voice communication between pilots and air traffic controllers is still the most flexible and efficient medium especially in a busy traffic environment, in non-standard situations or simply when exchanging air-ground messages in plain language is needed. As vulnerability seems not dominant compared to the number of crucial damages, voice communication is still the basic and most important communication method within the aeronautical mobile service. This motivated the development of a prototype called `Secure ATC Communications' (SACom) within the frame of the Global ATM Security Management (GAMMA) Project. The paper at hand describes the required functionalities of the prototype, the validation approach taken, using this security prototype as example, and conclusions for the results of validation, regarding the prototype itself as well as the validation methodology applied to the security context within ATM.
多年来,人们知道空中交通管制所使用的无线电通信很容易被侵入,因此经常受到攻击。然而,飞行员和空中交通管制员之间的语音通信仍然是最灵活和有效的媒介,特别是在繁忙的交通环境中,在非标准的情况下,或者仅仅是在需要用简单的语言交换空对地信息时。由于与关键损害数量相比,脆弱性似乎并不占主导地位,因此语音通信仍然是航空移动业务中最基本和最重要的通信方式。这推动了在全球ATM安全管理(GAMMA)项目框架内开发名为“安全ATM通信”(SACom)的原型。手边的文件描述了原型所需的功能、采用的验证方法(以此安全原型为例)以及验证结果的结论,包括原型本身以及应用于ATM中的安全上下文的验证方法。
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引用次数: 5
Free route airspace and the need of new air traffic control tools 自由航路空域和需要新的空中交通管制工具
Pub Date : 2016-09-01 DOI: 10.1109/DASC.2016.7777946
Cesar A. Nava-Gaxiola, C. Barrado
As part of the Single European Sky Airspace Research program (SESAR) a new operational instrument is being developed: the Free Route Airspace (FRA). FRA defines airspace areas where user can decide about the best performance routes, not subjected to airways or mandatory crossing points. Currently, 11 FRA projects are been deployed specially in low density areas and low density time periods. Long-term benefits for one single FRA can account for saving up to 32,000 nautical miles per day, which may represent around 100,000 Euros savings per days. In this paper we assess the benefit figures with the opinions of the involved air traffic controllers. They point to the challenges to be overtaken before extending the future FRA. An important issue, raised by the air traffic controllers, was the importance of the support tools. Also important are the previous training and a full FRA deployment.
作为欧洲单一空域研究计划(SESAR)的一部分,一种新的操作仪器正在开发中:自由航线空域(FRA)。联邦铁路局定义了空域,用户可以决定最佳性能路线,不受航空公司或强制性过境点的约束。目前,有11个联邦资源评估项目专门部署在低人口密度地区和低人口密度时期。一个单一的FRA的长期效益可以每天节省32,000海里,这可能意味着每天节省约100,000欧元。本文结合相关空中交通管制员的意见,对效益数字进行了评估。他们指出了在延长未来联邦铁路局之前需要克服的挑战。空中交通管制员提出的一个重要问题是支持工具的重要性。同样重要的是之前的培训和全面的联邦资源评估部署。
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引用次数: 6
Net2Plan-AFDX: An open-source tool for optimization and performance evaluation of AFDX networks Net2Plan-AFDX:一个用于优化和评估AFDX网络性能的开源工具
Pub Date : 2016-09-01 DOI: 10.1109/DASC.2016.7778026
Laureano Fernandez-Olmos, F. Burrull, P. Pavón-Mariño
In this paper we present the AFDX (Avionics Full-DupleX switched Ethernet) extension for the open-source networking tool Net2Plan [1][2]. The Net2Plan-AFDX extension is also open-source, with no cost. This software will provide integrators, researchers and students with a set of tools to calculate, given an AFDX network design, an exhaustive set of AFDX parameters and performance merits. Net2Plan-AFDX can also be used for developing additional tools to evaluate and research alternatives related to AFDX. The implemented AFDX modules offer a Network Calculus and a Trajectory Approach algorithms' implementation for the theoretical worst-case delay calculation, given a configuration table. It also implements a simulation tool that produces realistic end-to-end latency values expected in an operational environment, as well as other performance merits. Avionics System Integrators can improve their designs using the obtained results.
在本文中,我们提出了AFDX(航空电子全双工交换以太网)扩展的开源网络工具Net2Plan[1][2]。Net2Plan-AFDX扩展也是开源的,不需要任何费用。该软件将为集成商、研究人员和学生提供一套工具来计算,给定AFDX网络设计,一套详尽的AFDX参数和性能优点。Net2Plan-AFDX还可用于开发其他工具,以评估和研究与AFDX相关的替代方案。所实现的AFDX模块提供了网络演算和轨迹方法算法的实现,用于理论最坏情况延迟计算,给出了配置表。它还实现了一个仿真工具,可以在操作环境中生成实际的端到端延迟值,以及其他性能优点。航空电子系统集成商可以利用获得的结果改进他们的设计。
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引用次数: 9
期刊
2016 IEEE/AIAA 35th Digital Avionics Systems Conference (DASC)
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