Lecture Notes Fundamentals of Control Systems Instructor: Assoc. Prof. Dr. Huynh Thai Hoang Department of Automatic Control Faculty of Electrical & Electronics Engineering Ho Chi Minh City University of Technology Email: hthoang@hcmut.edu.vn huynhthaihoang@yahoo.com Homepage: www4.hcmut.edu.vn/~hthoang/ 6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 1 Chapter 8 ANALYSIS OF DISCRETE CONTROL SYSTEMS 6 December 2013 © H. T. Hoàng - www4.hcmut.edu.vn/~hthoang/ 2 Content Stability conditions for discrete systems Extension of Routh-Hurwitz criteria Jury criterion Root locus Steady state error Performance of discrete systems 6 December 2013 © H. T. Hoàng - www4.hcmut.edu.vn/~hthoang/ 3 Stability conditions for discrete systems 6 December 2013 © H. T. Hoàng - www4.hcmut.edu.vn/~hthoang/ 4 Stability conditions for discrete systems A system is defined to be BIBO stable if every bounded input to the system results in a bounded output. Im s Im z Stable Re s Stable Re z Re s< 0 | z|<1 1 z = eTs The region of stability for a continuous system is the left-half s-plane The region of stability for a discrete system is the interior of the unit circle 6 December 2013 © H. T. Hoàng - www4.hcmut.edu.vn/~hthoang/ 5 ... - tailieumienphi.vn