Why does the output time of my transfer function not change dependant on the input

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Daniel
Daniel 2025-7-4
评论： Sam Chak 2025-7-6
Hello,
I have modeled a system using a transfer function for a new and existing moving bogie system to evalue if the system can be improved for efficiency. When simulating in Matlab, the step response time remains the same irrepsective of the step input value, im not sure why this is happening. Can anyone explain?
the system transfer fucntion is
sys500000 = tf([6.1*10^-3], [1 0.02805 3.05*10^-3])
step((sys50000*0.5)*9025)
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Paul
Paul 2025-7-5
What exactly is the meaning of "output time" or "step response time"? Perhaps you can show a code snippet that generates some plots that illustrate the question.
Sam Chak
Sam Chak 2025-7-6
Ran in:
Hi @Daniel
The following step response info has been extracted from the given transfer function. Please describe the problem based on these values and findings.
sys500000 = tf([6.1*10^-3], [1 0.02805 3.05*10^-3])
sys500000 = 0.0061 ------------------------- s^2 + 0.02805 s + 0.00305 Continuous-time transfer function.
steadystate = dcgain(sys500000)
steadystate = 2
step((sys500000*0.5)*9025), grid on
●
stepinfo(sys500000*0.5)
ans = struct with fields:
RiseTime: 23.0506 TransientTime: 255.1193 SettlingTime: 255.1193 SettlingMin: 0.8080 SettlingMax: 1.4382 Overshoot: 43.8241 Undershoot: 0 Peak: 1.4382 PeakTime: 59.1038

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