chap7\chap7_1ctrl.m .....\chap7_1plant.m .....\chap7_1plot.m .....\chap7_1sim.mdl .....\chap7_1sim.mdl.r2011a .....\chap7_2ctrl.m .....\chap7_2plant.m .....\chap7_2plot.m .....\chap7_2sim.mdl .....\chap7_2sim.mdl.r2011a chap7