טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentIryna Gornostaev
SubjectInvestigation of Switched Control Performance Benefits
DepartmentDepartment of Electrical Engineering
Supervisor Professor Emeritus Feuer Arie


Abstract

It is known that linear feedback control systems have inherent frequency and time domain limitations. Hence, achievement of satisfactory transient response and admissible steady state error by means of linear feedback control is restricted by these limitations.

The switched control represents a new approach to the control of dynamical systems. The idea is that one has a finite set of controllers and, according to system behavior, the preferable controller is switched on at every instance.

One of the problems arising in switched systems is the problem of stability. It is well known that switching between stable systems may lead to instability. On the other hand, the switched system can be stabilized by the proper choice of switching sequence even if its individual subsystems are unstable. Studying this issue in literature has resulted in a number of sufficient conditions for asymptotic stability of the resulting switched system.

For some systems the selective use of linear controllers overcomes the constraints, inherent to linear feedback systems, and improves their performance. Moreover, the switched control applied to the systems with large -scale uncertainty allows us to guarantee stability of the closed loop system even when a single linear controller cannot ensure it .

Typically, design of switched systems is faced with problems related to the candidate controllers' design, choosing switching logic for achieving robust system yielding high performance, etc .

This paper presents a survey on these and other problems studied recently in literature.