包含了控制理论的各种仿真程序

				%  Figure 7.16      Feedback Control of Dynamic Systems, 4e
				%                        Franklin, Powell, Emami
				%
				% Script to generate fig. 7.16.
				clf;
				num=1;
				den=[1 0 0 0 0];
				rlocus(num,den);
				title('Fig. 7.16 Symmetric root locus for satellite system')
				grid;