School of Automation;
Northwestern Polytechnical University;
Xi’an 710129;
China;
School of Electrical and Control Engineering;
Shaanxi University of Science and Technology;
Xi’an 710021;
China;
College of Electronics and Information;
Hangzhou Dianzi University;
Hangzhou 310018;
China;
multi-agent system; fractional-order; consensus control; iterative learning control; virtual leader; state-delay;