The analysis of performance comparison of different fixed-step discretization method in continuous control system
ZHAO Guanghui;GAO Xin;FANG Jinfu;ZHANG Qingqing;YU Weimin;YAO Bing;School of Mechanical Engineering & Automation,University of Science and Technology Liaoning;Department of Mechanical and Power Engineering,Yingkou Institute of Technology;Dept.of Flight Control,Shenyang Aircraft Design & Research Institute;
Discrete methods are used in more and more continuous control systems,in which there are many fixed-step discretization methods.After analyzing and comparing the time performance and computational accuracy among different methods,we screened out three methods including Euler Method,Heun Method and Bogacki-Shampine Method,all of which behaved poorly and were not suitable for real systems.Tustin Method suits systems using 32-bit floating-point calculation,while RK4 Method suits those using 64-bit one. Both methods work well with relatively high precision.
【CateGory Index】： TP273