一种简单实用的时滞控制器

在传统Smith预估结构的基础上,用p(0)代替了原来的p(s),从而提高整个控制系统的动态性能,形成一种改进的预估控制器.针对实际对象和预估模型的各个参数的失配情况,进行理论分析和实例仿真.从改进前后系统根轨迹的对比以及仿真实验可以看出,改进的Smith预估器结构简单、鲁棒性好、参数易整定,且控制品质优于传统的Smith预估器,易于在实际的数字控制器或DCS中实现,具有明显的应用价值.图8,表1,参7.

A simple and practical time delay controller

Based on the traditional Smith predictor, this article presents an improved predictor. It mainly revises part of the traditional predictor to static one and thus improves the dynamic performance of the whole control system. According to all kinds of mismatch between the practical model' parameters and predictive model' parameters, this paper respectively gives out theory analysis and example simulation, which prove that the improved Smith predictor has better control performance than the traditional Smith predictor. The improved Smith predictor has simple structure and high robustness, at the same time, its parameters are easily to adjust. So it is very easy to realize the improved Smith predictor in practical data controller or in DCS, which obviously show the applicability value.8figs.,1tab.,7refs.