单回路负反馈控制系统的设计.doc

单回路负反馈系统校正前系统的单位阶跃响应曲线程序num=20;den=0.0125 0.525 1 20;step(num,den);grid on;xlabel(t);ylabel(c(t);title(Unit-Step Response of G(s)=20/(0.0125*s3+0.525s2+s+1)图2.1.2校正前系统的单位阶跃响应曲线2.1.3校正前系统的波特图校正前波特图程序num=20;den=0.0125 0.525 1;w=logspace(-2,3,100);bode(num,den,w);grid on;title(Bode Diagram of G(s)=20/s*(0.5s+1)*(0.025s+1)图2.1.3校正前的波特图校正前根轨迹图程序K=20;Z=;P=0 -2 -40;num,den=zp2tf(Z,P,K);rlocus(num,den);V=-45 2 -25 25;axis(V);TITLE(Root-locus plot of G(s)=4.08(0.432s+1)/s(0.088s+1)(0.5s+1)(0.025s+1);xlabel(Re);ylabel(Im);图2.1.1校正前 根轨迹图图2.1.4校正前的仿真图图2.1.5校正前的仿真阶跃响应曲线校正后系统的单位阶跃响应曲线num=0 1.7626 4.0800;den=0.0011 0.0587 0.6130 2.7626 4.08;step(num,den);grid on;xlabel(t);ylabel(c(t);title(jlyC(s)/R(s)=20*0.204*(0.432*s+1)/(0.088*s+1)*(0.0125*s3+0.525s2+s+1)+20*0.204*(0.432*s+1);图2.3.3校正后系统的单位阶跃响应曲线2.3.4校正后的波特图校正后波特图程序num=1.7626 4.0800;den=0.0011 0.0587 0.6130 1.0000 0;bode(num,den);grid on;title(jlyC(s)/R(s)=20*0.204*(0.432*s+1)/(0.088*s+1)*(0.0125*s3+0.525s2+s+1)+20*0.204*(0.432*s+1);)图2.3.4校正后波特图图2.3.5校正后的仿真图图2.3.6校正后的仿真图校正后根轨迹图程序K=4.08;Z=-1/0.432 ;P=0 -1/0.088 -2 -40;num,den=zp2tf(Z,P,K);rlocus(num,den);V=-45 2 -25 25;axis(V);TITLE(Root-locus plot of G(s)=4.08(0.432s+1)/s(0.088s+1)(0.5s+1)(0.025s+1);xlabel(Re);ylabel(Im);图2.3.2校正后的根轨迹图图3.1.3校正装置的仿真