网络控制系统多参最优性能研究

Research on Multi-parameter Optimal Performance of Network Control Systems

针对网络控制系统最优性能问题,对最优控制器进行设计和分析。首先建立了具有时延和数据丢包的系统模型,然后考虑控制对象具有非最小相位(NMP)零点、不稳定极点的情形,采用互质分解、Youla参数化等方法,求出最优跟踪性能的表达式并给出完整证明。最后分别研究最优跟踪性能与NMP零点、不稳定极点、时延、数据丢包这些参数间的相互关系。仿真结果表明,考虑不同的参数耦合,跟踪性能变化不同。

Aiming at the issue of optimal performance of network control system, the optimal controller is designed and analyzed. Firstly, the system model featuring time delay and data packet loss is established, then in consideration of the controlled object possesses non-minimum phase （NMP） zeros and unstable poles, by adopting eoprime factorization and Youla parameterization methods, the expression of optimal tracking performance is obtained and complete proof is given. Finally, the relationships between this performance and parameters including NMP zero, unstable pole, time delay and data packet loss are researched respectively. The results of simulation show that the diversification of tracking performance depends on considering different parameter coupling.