包含了控制理论的各种仿真程序

				% Fig. 6.46   Feedback Control of Dynamic Systems, 4e 
				%             Franklin, Powell, Emami
				%
				
				clear all;
				close all;
				
				num=1;
				den=[1 0 0];
				w=logspace(-2,2,100);
				[m,p]=bode(num,den,w);
				loglog(w,m);
				grid;
				xlabel('\omega (rad/sec)');
				ylabel('magnitude');
				title('Fig. 6.46 Spacecraft frequency-response magnitude');