网络控制系统诱导时延的自适应补偿研究

Self-adapting compensation study to the network-induced delay of networked control system

在网络控制系统中,网络诱导时延是造成系统性能下降甚至不稳定的基本因素.为了有效地抑制网络时延对网络控制系统性能的影响,提出了一种基于BP神经网络补偿的自适应PID控制方法,在不改变已有PID控制器控制参数的情况下,实现了对网络时延的在线自适应补偿.仿真结果表明,与传统的PID控制器比较,该方法能有效补偿网络时延的影响.

The network-induced delay is the most important factor to performance degradation including destabilization in networked control system （NCS）. In order to restrict the influence of the network-induced delay, an adaptive PID controller based on the compensation of BP neural network was introduced. The controller could achieve the on-line adaptive compensation for network time delay without changing the parameters of PID controller. The result of simulation shows that the proposed new PID controller is better than the traditional ones.