摘要
为解决网络延时对网络化控制系统性能的影响,从控制的角度提出基于系统模型的补偿器设计方案以解决网络延时问题.通过对广义预测控制算法GPC状态空间形式的推导,设计具有多步预测功能的网络控制器,实现前向通道的延时补偿;构造具有延时补偿功能的状态观测器以补偿反馈通道延时.分析了使用上述延时补偿策略所构成的闭环网络控制系统的稳定性.通过对不同网络延时补偿的仿真实验,证实了该补偿算法能有效改善控制系统性能并保持系统的稳定.
Time delays in networked control systems degrade the performance of the controlled systems. A model-based compensation algorithm is proposed to alleviate the adverse effect of network-induced delay on the networked control systems. The multi-step predictive controller using generalized predictive control in a state space form is designed to compensate the delays in the forward channel. The state predictor with the ability to compensate for the time delay in feedback channel is also reconstructed to predict the plant states. In addition, the stability of closed-loop networked control system with the mentioned compensation strategy is analyzed. Finally, simulation results of different time delays demonstrate that the scheme with the designed compensator can effectively improve the control performance and keep the system stable.
出处
《控制理论与应用》
EI
CAS
CSCD
北大核心
2008年第2期217-222,共6页
Control Theory & Applications
基金
中国海洋石油总公司与中国科学院技术合作项目“海上平台优化设计与关键技术研究”资助项目(KJCX2-SW-L03-01)
