in System identification, if input is PWM signal....

Hello ! i'm using System identification toolbox.

i already got step response from RC servo motor.

the problem is input signal type is PWM.

i gave step siganl throught PWM (1 ms to 2ms ).

how i can identify this 1ms to 2ms PWM signal for using system identification toolbox ?

[Bianka Moreno]

How you solved it?

Answer 1

[MULI]

Hi Minjae,

To know about how to use PWM signal as an input in the System Identification Toolbox you may follow these steps:

• Convert PWM to a Usable: Transform the PWM signal into a duty cycle. For example, if your PWM pulse width varies between 1 ms and 2 ms within a 20 ms period, convert these to duty cycle percentages (e.g., 5% for 1 ms and 10% for 2 ms).
• Import Data: Load your input (duty cycle) and output (step response) data into the toolbox.
• Select a Model: Choose a model type that fits your data, such as a transfer function or state-space model.
• Estimate the Model: Use the toolbox to estimate the model parameters based on your data.

By converting the PWM signal to a duty cycle, you can effectively use it as an input for system identification.

You may refer to this link for more information and examples related to “System Identification Toolbox”

https://www.mathworks.com/help/ident/index.html