纯滞后串级控制系统的新型控制算法

详细信息

A New Control Method for the Cascade Control System with Pure Time-delay

College of Automation and Electronic Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

摘要: 针对含有纯滞后的串级控制系统，基于模型参考辨识的设计思想，提出一种改进控制算法．将副控对象看作一个被辨识过程，用广义误差e经过自适应辨识器来在线调整Smith预估器，使Smith预估器的动态与副控对象的动态尽可能一致．同时，根据所期望的性能指标，为主控对象设置了一个参考模型；当主控对象发生变化时，系统依然具有良好的输出．仿真结果表明了该方法的有效性．
- 串级控制系统 /
- 滞后 /
- Smith预估器 /
- 参考模型
Abstract: According to the design principle of model reference identification,an improved method is presented for the cascade control system with pure time-delay.The secondary control object is regarded as an identification process,the Smithpredictor is tuned online by the adaptive identifier with the help of generalized error e,and the coherence of dynamicity is maintained between the Smith-predictor and the secondary control object.At the same time,a reference model is set for the master control object based on the expected performance index,and the system has a satisfactory output even when the master control object changes.The simulation examples are given to illustrate the effectiveness of the proposed approach.
- cascade control system /
- time-delay /
- Smith-predictor /
- reference model

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