Page 178 - MATLAB an introduction with applications
P. 178
Control Systems ——— 163
>> title(‘Unit-step response’)
>> xlabel(‘t Sec’)
>> ylabel(‘Output y(t)’)
Unit-step response
1.6
1.4
1.2
y(t) 1
Output 0.8
0.6
0.4
0.2
0
0 5 10 15 20
t Sec
Fig. E3.16 Unit-step response
>> %Response to rise from 10% to 90% of its final value
>> r1=1;while y(r1)<0.1,r1= r1+1;end
>> r2=1;while y(r2)<0.9,r2= r2+1;end
>> rise_time=(r2–r1)*0.02
rise_time =
0.5400
>> [ymax,tp]=max(y);
>> peak_time=(tp–1)*0.02
F:\Final Book\Sanjay\IIIrd Printout\Dt. 10-03-09
