基于移位继电反馈的模型辨识与控制研究  

Research on Model Identification and Control Based on Shifting Relay Feedback

作　　者：吴学斌 任正云[1] WU Xue-bin;REN Zheng-yun(School of Information Science and Technology,Donghua University,Shanghai 201620 China)

机构地区：[1]东华大学信息科学与技术学院,上海201620

出　　处：《自动化技术与应用》2023年第4期41-44,63,共5页Techniques of Automation and Applications

摘　　要：针对传统继电反馈模型辨识精度较低的问题,介绍了一种新型的移位继电反馈方法,并根据辨识结果设计了基于模型的预测PI控制器。移位继电法采用带滞环的偏置继电器,能够从单次继电反馈测试实验得到模型的三个频率响应点,移位继电法不需要任何模型先验知识,并且辨识精度较高。预测PI控制对于时滞环节具有良好的控制性能,根据移位法与ATV法的辨识结果分别设计了预测PI控制器进行仿真比较,仿真结果验证了移位继电法的实用性。Aiming at the problem of low identification accuracy of traditional relay feedback model,a new shifting relay feedback method is introduced.And a model-based predictive PI controller is designed according to the identification results.The shifting relay method uses bias relay with hysteresis loop,which can get three frequency response points of the model from a single relay feedback test experiment.The shifting relay method does not need any prior knowledge of the model and has high identification accuracy.Predictive PI control has good control performance for time-delay link.According to the identification results of shift method and ATV method,predictive PI controllers are designed respectively for simulation comparison.The simulation results verify the practicability of shift relay method.

关 键 词：模型辨识 继电反馈控制 偏移法 预测PI控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]