A double-mechanism strategy of control systems for improving the accuracy of output regulation

For the purpose of rejecting uncertainty and/or disturbance and regulating the system with high accuracy, we propose a double-mechanism method. The method can be summarized as follows: Firstly, for the system which contains uncertainties and/or disturbances, we design the integral feedback mechanism with a variable gain so that the disturbances and uncertainties can be rejected. Secondly, for the remaining part of the system, we choose the proper state feedback mechanism to ensure the required performance. Theoretical analysis is provided to guarantee the stability or even optimization of the relevant control system. Comparative analysis is also provided to show the advantages of the method. And simulation results for certain kinds of industrial systems indicate the effectiveness of the method.