ts=0 te=10 dt=0.01 sys=tf([1 6 4],[1 7 10]) t=ts:dt:te f=4*sin(t) y=lsim(sys,f,t) plot(t,y) xlabel( t(sec) ) ylabel( y(t) ) grid on 三 ts=0 te=5 dt=0.01 sys=tf([1 6 4],[1 7 10]) t=ts:dt:te y1=impulse(sys,t) y2=step(sys,

很好的资料，关于西门子200,300系列的PLC例程，给予STEP 7 MicroWIN 4.0 SP3版本的，经过验证可以编译通过，入门级的可以参考下-Very good information on the Siemens PLC family routines 200,300, giving STEP 7 MicroWIN 4.0 SP3 version, proven to compile, you can refer to the entry-level

单片机向LM629给初值，LM629根据所给参数开始调节直流电机转速，编码器反馈值送回LM629，重新修改参数，控制电机转速。-Microcontroller to the initial value to the LM629, LM629 began to adjust parameters according to the DC motor speed encoder feedback value back to the LM629, re-modify the parameters to