Time variant disturbance control system performance evaluation method based on control of multi-model hybrid minimum variance

Abstract

Aiming at overcoming the disadvantages in the prior art, the invention provides a time variant disturbance control system performance evaluation method based on the control of multi-model hybrid minimum variance. The method comprises the following steps of: formulating a minimum variance criterion to form a multi-model hybrid minimum variance control criterion according to each disturbance model; and blending a multi-model minimum variance control criterion at each time point by adopting a blending method, and taking an output variance under the action of the multi-model minimum variance control criterion as a final performance evaluation criterion. After the method is used, the characteristics of each disturbance can be sufficiently considered, the influence on exactly evaluating the performance accuracy of a current control system caused by the intermittent switching and the higher transient error by adopting the conventional multi-model switching method when a plurality of interference signals appear at the same time can be effectively solved, and the performance evaluation of the time variant disturbance control system can be exactly and reliably realized.

Description

technical field [0001] The invention relates to a performance evaluation method of a time-varying disturbance control system, in particular to a performance evaluation method of a time-varying disturbance control system based on multi-model hybrid minimum variance control. Background technique [0002] With the continuous improvement of the actual industrial automation degree, the automatic control loop of the control system is also increasing. If the performance of the control system can be effectively evaluated by some methods, it can be judged whether the system is running in the best state through the evaluation results, and Strategies to improve the performance of the control system are proposed to keep the entire industrial process running in a good working condition. This not only reduces the workload of personnel maintenance, but also improves industrial efficiency. [0003] In 1989, Harris first proposed the idea of ​​control system performance evaluation, using th...

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Problems solved by technology

However, since multiple disturbances may appear at the same time, intermittent switching occurs during switching, and the system has a large transient error, so it is impossible to accurately evaluate the performance of the current control system

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