9218

8520

كارشناسي ارشد

كنترل

اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر

1393

دوازده،66ص.: نمودار

ص.ع.به فارسي و انگليسي

فريد شيخ الاسلام، جواد عسگري

علي خاكي صديق

7/8/93

مهندسي برق و كامپيوتر

ID8520

Stability analysis and asynchronous control of time dependent switched systems Mahdi Siavash Mahdi siavash@yahoo com Date of Submision August 9 2014 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisors Farid Sheikholeslam sheikh@cc iut ac ir Javad askari j askari@cc iut ac ir Abstract Switched systems are a class of hybrid systems with a finite number of subsystems andthe switching rule that orchestrates switching between them As an important application switching control is used to control a system that a single controller cannot control it Thismay be due to actuator limitation or multiple objectives Switched systems can be used tomodel many realworld systems that have intrinsic properties of multi model such as flightdynamic intelligent cars switching electrical networks and networked control systems Switched systems are categorized based on switching signals Switching signals areclassified into arbitrary signals state dependent signals and time dependent signals Thisthesis investigates the stability analysis of time dependent switched systems with stableand unstabilizable subsystems in asynchronous mode The so called asynchronousswitching is used to describe the switching of a controller which has a lag to the switchingof system modes By allowing the Lyapunov like function to increase during theasynchronous period and the running time of unstable subsystems the stability problem issolved The stability results are based on minimum activation period of stable subsystemand the average time between two consecutive switching instants for stable and unstablemodes Then state feedback controllers are designed to stabilize the switched closed loopsystem while desinging the minimum activation period of stable subsystem Thedesingned procedures are presented in the form of linear matrix inequalities LMIs whichare solvable by using exsiting LMI solvers such as YALMIP Finally the numericalexamples are given to illustrate the effectiveness of obtained theoretical results Keywords Switched systems average dwell time unstabilizable subsystem exponential stability asynchronous switching

فريد شيخ الاسلام، جواد عسگري

علي خاكي صديق