实验二实验五 原来系统的幅值裕量以及相位裕量，对应的穿越频率： Warning: The closed-loop system is unstable. In warning at 26In lti.margin at 67In margin at 92In test2 at 11In run at 57h =-4.4370gam =-12.9919omig_g =1.4142omig_c =1.8020校正环节是：Transfer function: 20.34 s + 1 - 180.2 s + 1校正以后系统的幅值裕量以及相位裕量，对应的穿越频率：h =13.9226gam =44.8158omig_g =1.3671omig_c =0.4937实验四 原来系统的幅值裕量以及相位裕量，对应的穿越频率：原来系统的幅值裕量以及相位裕量，对应的穿越频率：h =Infgam =17.9642omig_g =Infomig_c =6.1685校正环节是：校正环节是：Transfer function: 0.2397 s + 1 - 0.04744 s + 1校正以后系统的幅值裕量以及相位裕量，对应的穿越频率：校正以后系统的幅值裕量以及相位裕量，对应的穿越频率：h =Infgam =54.0751omig_g =Infomig_c =9.3776