Timeline for How to tune PID for a step response
Current License: CC BY-SA 4.0
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| Nov 28, 2023 at 13:06 | comment | added | Abel | You can make some assumptions based on the spec's data points, but it looks like you have the capability to measure. You can always get more and more detailed in a model. A key piece in your transfer function: what load? If you want to get really detailed, you may even involve your pwm base freq and rotor position as the interactions will have an impact. I suspect you should just change pwm output and look for steady state and time to reach it. | |
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| Apr 27, 2019 at 7:28 | comment | added | BhanuKiran | @VicenteCunha You are right. My set up consists of a motor,Gearbox and screw and nut mechanism to lift weights (More like a electric Jack for a car.). And the setup should be able to lift 0-125 kilos of weight. The above statistics are taken while lifting 85 kg weight at speed of 0.01 m/s (10 mm/sec). | |
| Apr 24, 2019 at 9:03 | comment | added | Vicente Cunha | As for the question regarding time constant: for a linear system the time constants does not depend on input amplitude. However, time constant for a motor will change according to mechanical load. And your current data does not indicate that load is constant. | |
| Apr 24, 2019 at 8:58 | comment | added | Vicente Cunha | The data you currently have is inadequate. If the PWM output was kept constant and speed fell, this indicates some form of structural or time varying issue. Make sure nothing disturbs the system while taking measurements. If the issue persists, then PWM frequency is possibly too low, or the motor does not handle well being run below nominal voltage. | |
| Apr 22, 2019 at 16:03 | answer | added | Tony Stewart EE75 | timeline score: 0 | |
| Apr 22, 2019 at 8:05 | review | First posts | |||
| Apr 22, 2019 at 16:31 | |||||
| Apr 22, 2019 at 8:00 | history | asked | BhanuKiran | CC BY-SA 4.0 |