hi, I have a transfer function. I want to find the input waveform which will give me a step waveform at the output. If H is the transfer function, I try to find x(t) by taking the inverse laplace of 1/(s.H). But if I feed x(t) back to H, I do not get the output as a step. Instead I get something else totally different. Is my matlab code given below ok? The matlab code is below %define the transfer function H=tf([kp ki/T],[K kp ki/T]); %step_f = 1/s step_f = tf([1],[1 0]); %get the input waveform in the laplace domain inp_f = step_f/H; %using inp_f find the required input waveform in time domain. t = 0:0.0001:.9; inp_i=impulse(inp_f, t); %verify that the output "out" is a step waveform out=lsim(contr_out, inp_i, t); -> here if I plot out, it is not a step waveform

# generating step output : matlab issues

Started by ●November 3, 2010