死区非线性系统特性分析及补偿控制

Analysis and Compensation for Nonlinear Systems with Dead-zone

针对含有非线性“死区”环节的热工控制对象,用线性系统理论和描述函数方法分析了系统的动态特性,给出了可选择的控制器的类型和参数的极限值;为了克服“死区”对闭环系统性能的影响,建立了偏差信息与死区参数之间的关系,构造了一个动态“死区逆模型”来修正控制器的输出,试验结果表明,所设计的动态逆模型可以完全补偿死区特性的影响,这种方法简单、可行。

The dynamic performance of a thermal plant with dead-zone is analyzed based on the describing function method. To eliminate the deadzone effect a Dead-zone inverse model is established. The result of simulation shows that this compensation method is feasible and effective.