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为了有效地解决工业现场中常见的饱和现象,提出了一种基于Bessel滤波器最优状态反馈与改进内模控制相结合的抗饱和控制方法。采用基于Bessel滤波器原理的优化设计方法,充分利用Bessel滤波器所具有的低通滤波特性及鲁棒性较高的优势,改进系统的动态特性。简要地介绍了饱和问题研究的现状,阐述了产生饱和问题的根本原因。进行了系统的分析并给出了改进内模控制器设计方法。给出了运用该方法的一个仿真实例。通过对化工过程中常见的装置进行实验仿真研究表明,当饱和现象严重的时候,系统也能达到理想的控制效果;当模型严重失配或存在干扰时,系统具有很强的鲁棒性能和抗干扰能力。该方法是一种很有实际价值的工程控制方法。
In order to solve the common saturation phenomenon in industrial field effectively, an anti-saturation control method based on Bessel filter’s optimal state feedback and improved internal model control is proposed. The optimal design method based on Bessel filter principle is used to make full use of the low-pass filter characteristics and high robustness advantages of Bessel filter to improve the dynamic characteristics of the system. The status quo of the research on saturation is briefly introduced, and the root cause of the problem of saturation is expounded. The system analysis is given and the design method of the improved internal model controller is given. A simulation example using this method is given. The experimental simulation of common devices in the chemical process shows that the system can achieve the ideal control effect when the saturation phenomenon is serious. When the model is seriously mismatched or there is interference, the system has strong robustness and resistance Interference ability. This method is a very practical engineering control method.