基于广义预测控制的网络控制系统设计

Design of the Network Control System Based on GPC

摘要:

网络控制系统中,网络诱导时延和数据包丢失会导致系统控制性能的下降甚至不稳定。针对上述问题, 提出了一种基于广义预测控制的控制方法。该方法采用时间戳机制和模型的在线辨识,能够根据测量系统输出及时对预测值进行在线修正。在执行器端设计了网络延迟补偿器,可根据当前时刻的最新控制信号对网络系统实现有效控制。仿真结果验证了该方法的有效性。

Abstract:

There are induced delays and data packet dropouts in NCSs which deteriorate the control performance and stability of network control systems. A control method based on generalized predictive control was proposed for NCSs to cope with these problems. The data time-stamping mechanism and online identification method were introduced and applied to the presented strategy. The predictive values were modified promptly according to the measurement output of the system. The network delay compensator was set up to select the latest control signals to make the control method work efficiently. Finally, the effectiveness of the control strategy was demonstrated with a numeric simulation.