qTo test the robust stability, we need to compute ||Gp11||¥ ,
•>> Gp11 = sel(Gp, 1:2, 1:2);
•>> norm_of_Gp11 = hinfnorm(Gp11,0.001);
• which gives ||Gp11||¥ =0.933<1. So
the system is robustly stable.
• To check
the robust performance, we shall compute the for each frequency with
•
•>> blk = [2,2;4,2];
•>> [bnds,dvec,sens,pvec] = mu(Gpf,blk);
•>> vplot(‘liv,m’,vnorm(Gpf),bnds)
•>> title(‘Maximum Singular Value and mu’)
•>> xlabel(‘frequency(rad/sec)’)
•>> text(0.01,1.7,’maximum singular value’)
•>> text(0.5,0.8,’mu bounds’)