一类热工不稳定对象的抗重复扰动控制

Repetitive disturbances rejection control for a class of thermal unstable process

本文针对不稳定的热工非自衡对象提出了一种控制方法,该方法对重复性扰动具有较突出的抑制能力。通过反馈补偿可以将含有积分环节的不稳定滞后过程IPDT模型补偿为二阶非最小相位对象。然后通过设计二阶系统的动力学通用控制器实现对IPDT模型的控制。同时,充分利用IPDT模型自身特性使系统对周期性重复扰动具有一定的抑制能力。仿真实验证明了该方法具有良好的控制特性和鲁棒性能。本文提出的方法结构简单,设计简便,容易在工程实践中推广应用。

A control method for unstable thermal non-self-balancing objects is proposed, which has remarkable ability to restrain repetitive disturbances. In this method, the IPDT model of unstable hysteresis process with integral link can be equivalent to a two-order non-minimum phase system through feedback compensation. Then, by designing a dynamics general controller, the IPDT model can be controlled. At the same time, by making full use of the self-characteristics of the IPDT model, the system has a certain ability to inhibit the periodic repetitive disturbances. Simulation test results show this method has good control performance and robustness, it is simple in structure and design, and easy to be popularized and applied in engineering practice.