摘要
针对CAN网下的网络控制系统(NCS),提出了一种基于网络运行状态的动态调度策略,通过在线调整控制系统的采样周期以适应网络中信息流的变化。采用动态调度策略的NCS为一变采样周期系统,将存在时延和数据包丢失的变采样周期NCS建模为一类具有参数不确定性的离散切换系统,利用Lyapunov方法研究了系统的鲁棒稳定性和控制器的设计方法。仿真结果表明所提出的综合设计方法对改善网络的运行能力和保证系统稳定性是有效的。
A dynamic scheduling strategy based on network running state was proposed for a networked control system （NCS） operating in CAN. NCS is adapted to the change of information flow in the network by adjusting its sampling periods. NCS of using the dynamic scheduling strategy is a sampiing period-variable system, and is modeled as a discrete switching system when network-induced delay and data-package dropout appear in a sampling-variable period. Robust stability and controller design method for NCS were studied by Lyapunov method. The simulated results show that the control and scheduling co-design method is available to improve the running capability of network and assure the operational stability of the system.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2009年第4期491-496,共6页
Acta Armamentarii
基金
国家自然科学基金资助项目(60174019
60474034)
关键词
控制理论
网络控制系统
动态调度
不确定系统
鲁棒控制
control theory
networked control system
dynamic scheduling
uncertain system
robust control
