US 2022/0404777 A1Published application

Design method for undisturbed switching of linear controllers

AssigneesDut Artificial Intelligence Institute, Dalian, Dalian Aerospace Power Control System Co., Ltd

InventorsSixin WEN, Ximing SUN, Yanhua MA, Xian DU, Jingwen DU, Zhuorui PAN, Guangchao HAO, Yuwen HAO

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Abstract

A design method for undisturbed switching of linear controllers is provided for solving the problem of sudden system response change or an unstable control circuit caused by switching of multiple linear controllers, in which the linear controllers include proportional-integral-derivative (PID), linear-quadratic-Gaussian (LQG), linear active disturbance rejection control (LADRC), H∞, model reference adaptive control (MRAC), and open-loop controllers. Firstly, differentials tbr outputs of the controllers are found, then through controller decision, a controller is selected to be connected to a closed-loop control circuit, and a differential term of the controller connected to the closed-loop control circuit is integrated through a common integrator, thereby ensuring smooth controller switching. The design method has a simple structure and good versatility, is operable, and can be easily applied to various actual control systems without requiring parameter adjustment.

Claims4

Dependent claims

A design method for undisturbed switching of linear controllers, comprising the following steps:

step 1:
establishing a numerical simulation program of a control system;
step 2:
configuring controllers to allow performance of a closed-loop control system to meet an expected design requirement, wherein the controllers comprise linear controllers and an open-loop controller;
and
step 3:
combining the open-loop controller and the linear controllers into a switching controller by:
differentiating outputs of the linear controllers, then based on a decision of the switching controller, selecting one of the linear controllers to be connected to form a closed-loop control circuit, and taking out a differential term of the linear controllers for integration;
wherein taking out the differential term of the linear controllers for integration comprises differentiating the linear controllers, and then using a common integrator to ensure smooth switching, resulting in eliminating adverse effects of sudden change or instability caused by controller switching.

6 more elements

Dependencies are inferred from the claim text.