Combined Nonlinear Feedback Control And Application In Input Saturation System With Output Adjustment Problem

The problem of output regulation is one of the important problems in modern control theory.With the application of output regulation problem in engineering practice,the complexity and diversity of controlled system become an inevitable problem.Because of the complex structure of the controlled system and the external system,how to design a good controller is not only a key point in the output regulation problem,but also a difficult point.Therefore,the study of output regulation has also become a challenging research field in modern control theory.In this paper,the design of several types of controllers is described by studying the output regulation of different controlled systems.We mainly study three kinds of output regulation problems: the first is a combination of non-linear feedback controller design with input saturation of linear system output;the second is a combination of output adjustment problem with multi-input multi-output system with input saturation Nonlinear feedback controller design;the third kind is a combination of non-linear feedback controller design with output saturation of discrete multi-input multi-output system with input saturation.The specific research work is as follows:The input saturation is the common problem of output regulation problem when applied to the actual system.This paper presents the input saturation based on CNF control.In this paper,we present a new method to calculate the output saturation problem.Controller design,the system also has good steady-state performance and transient performance.The complexity of the system often has the characteristics of high order multivariate,which will affect the design and performance of the tracking controller.In this paper,the linear part of the CNF control law guarantees the speed of the tracking,and the nonlinear part can eliminate the overshoot caused by the linear part,Realization of tracking control for input saturated high order multivariable systems.3.The existing combination of nonlinear feedback design methods are mainly for a given reference point and continuous signal trajectory tracking,discrete systems for tracking the signal has not been studied in depth,especially with high-order multi-input multi-output characteristics of the paper,the design method of the discrete CNF controller and the corresponding reduced order observer is presented,and the tracking and positioning of the system is realized in the discrete time domain.4.Application of input saturation high-order multivariable CNF control designmethod for the input saturation with the helicopter model controller design and output adjustment.In order to be able to track the reference signal,a state observer and a CNF controller are constructed.In order to study the performance of the controller,respectively,in the absence of external interference and external interference in two cases designed the controller.All the simulation results show that the composite nonlinear feedback controller is effective,which proves that CNF control method can obviously improve the transient performance of the model.