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Hierarchical resource allocation for integrated modular avionics systems 被引量:7
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作者 Tianran Zhou Huagang Xiong Zhen Zhang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2011年第5期780-787,共8页
Recently the integrated modular avionics (IMA) architecture which introduces the concept of resource partitioning becomes popular as an alternative to the traditional federated architecture. A novel hierarchical app... Recently the integrated modular avionics (IMA) architecture which introduces the concept of resource partitioning becomes popular as an alternative to the traditional federated architecture. A novel hierarchical approach is proposed to solve the resource allocation problem for IMA systems in distributed environments. Firstly, the worst case response time of tasks with arbitrary deadlines is analyzed for the two-level scheduler. Then, the hierarchical resource allocation approach is presented in two levels. At the platform level, a task assignment algorithm based on genetic simulated annealing (GSA) is proposed to assign a set of pre-defined tasks to different processing nodes in the form of task groups, so that resources can be allocated as partitions and mapped to task groups. While yielding to all the resource con- straints, the algorithm tries to find an optimal task assignment with minimized communication costs and balanced work load. At the node level, partition parameters are optimized, so that the computational resource can be allocated further. An example is shown to illustrate the hierarchal resource allocation approach and manifest the validity. Simulation results comparing the performance of the proposed GSA with that of traditional genetic algorithms are presented in the context of task assignment in IMA systems. 展开更多
关键词 avionics system engineering integrated modular avionics (IMA) resource allocation hierarchical scheduling genetic algorithm (GA) simulated annealing algorithm.
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The Research on Key Technologies of Chinese Heavy-Lift Launch Vehicle Control System 被引量:2
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作者 SONG Zhengyu 《Aerospace China》 2017年第2期13-22,共10页
This paper reviewed the development of control technology in domestic and foreign launch vehicle(LV), and based on which, the key technologies of control system for Chinese heavy-lift launch vehicles were proposed. A ... This paper reviewed the development of control technology in domestic and foreign launch vehicle(LV), and based on which, the key technologies of control system for Chinese heavy-lift launch vehicles were proposed. A dynamic on-line trajectory planning technique was discussed to meet the demand of guidance control under complex constraints, and model based identification and adaptive control technology was suggested to deal with the control problems caused by model uncertainty and disturbance, and an integrated avionics system based on high speed communication was put forward for module integration and distributed control, and FBG based real time flight control was also discussed. Moreover, other key technologies, such as wireless interconnection, wireless power transfer, and temporal and spatial partitioning operating system, are both briefly introduced for the application in control systems. These studies will lead to breakthroughs in autonomous flight control in LV, and provide technical support for more long-term deep space explorations. 展开更多
关键词 Dynamic trajectory planning on-line identification MPC integrated avionics system heavy-lift launchvehicle technical margin
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Performability analysis of avionics system with multilayer HM/FM using stochastic Petri nets 被引量:4
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作者 Wan Jianxiong Xiang Xudong +3 位作者 Bai Xiaoying Lin Chuang Kong Xiangzhen Li Jianxiang 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2013年第2期363-377,共15页
The integrated modular avionics (IMA) architecture is an open standard in avionics industry, in which the number of functionalities implemented by software is greater than ever before. In the IMA architecture, the r... The integrated modular avionics (IMA) architecture is an open standard in avionics industry, in which the number of functionalities implemented by software is greater than ever before. In the IMA architecture, the reliability of the avionics system is highly affected by the software applications. In order to enhance the fault tolerance feature with regard to software application failures, many industrial standards propose a layered health monitoring/fault management (HM/FM) scheme to periodically check the health status of software application processes and recover the malfunctioning software process whenever an error is located. In this paper, we make an analytical study of the HM/FM system for avionics application software. We use the stochastic Petri nets (SPN) to build a formal model of each component and present a method to combine the components together to form a complete system model with respect to three interlayer query strategies. We further investigate the effectiveness of these strategies in an illustrative system. 展开更多
关键词 Health monitoring/fault management system integrated modular avionics MULTILAYER Performability analysis Stochastic Petri nets
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