Simulation Research Of H_∞ Mixed Sensitivity Design Approache

The H∞control theory has reached a mature level after more than 20 years of development. H∞Control method is one of the robust control methods. Solving this issue requires very strict assumptions. Many objects do not meet the requirements of assumptions what affected the application. H∞mixed sensitivity design approaches as the example with the example of satellite attitude control to study and sum up the approaches to solve the problems appear in the control of a H∞control problem that does not meet the standard assumptions of the H∞control problem and the solutions to the cancellation of the plant pole by the controller.The H∞mixed sensitivity design approaches have simple and intuitive advantages, H∞mixed sensitivity design approaches include the three main approaches: S/T mixed sensitivity design approach, S/KS mixed sensitivity design approach and PS/T mixed sensitivity design approach. This thesis on the specific design methodology of the three main approaches and the S/T mixed sensitivity design and S/KS mixed sensitivity design problems may arise in the course of the zero-pole cancellation problem.This thesis is in the draw and the establishment of a satellite model to design and for MATLAB simulation. According to the three types of mixed sensitivity design problems` system architecture diagram, select the state variables, write out the state-space expression, and calculated the Generalized object, closed-loop system that is the transfer function of generalized matrix of the three types of mixed sensitivity design problems. Select the appropriate weighting function, call hinfsyne function simulation to study the approaches to solve the problems appear in the control of a H∞control problem that does not meet the standard assumptions of the H∞control problem and sum up the approaches to the solutions to the cancellation of the plant pole by the controller.