无线网络化控制系统的功率感知事件触发策略及其闭环稳定性

Power-aware event triggering for wireless networked control systems and its closed-loop stability

中文关键词  无线网络化控制系统  误码  事件触发  功率优化

英文关键词  wireless networked control systems  symbol error  event trigger  power optimization

中文摘要

      本文研究了能量受限无线网络化控制系统的设计和分析问题. 首先建立了无线网络化控制系统中通信传 输时的数据误码率和丢包率间的定量关系, 从而在通信功率与系统性能之间建立了联系. 进而设计了基于事件触发 策略和功率优化机制的智能控制器, 该方法充分考虑了网络节能与控制系统性能表现两方面的要求, 通过添加事件 触发机制减少了系统的通信次数, 并在此基础上以优化算法优化单次发送功率. 随后, 在随机稳定框架下给出了相 应闭环系统稳定的充分性条件, 在理论上证明了在该充分条件下, 本文的设计能够在降低通信能耗的同时令系统维 持预期的性能表现. 最后数值例子证明了所提出方法的有效性.

英文摘要

      The design and analysis of energy-constrained wireless networked control systems are investigated in this paper. A quantitative relationship between symbol error rate and packet loss rate in communication transmission is ?rstly established for wireless networked control systems, and then the relationship between the communication power and the control system performance is established, following which an intelligent controller based on an event triggering strategy and a power optimization mechanism is designed. Considering both the requirements of communication energy saving and control system performance, this design reduces communication burden by the event triggering mechanism and the transmission power optimization. Then, the suf?cient conditions ensuring the closed-loop stability are derived within the stochastic stability framework, and the system analysis guarantees that the design of this paper can reduce the communication energy consumption while maintaining the expected performance of the control system. Finally, a numerical simulation examples illustrates the effectiveness of the proposed approach.