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TPIC8101 Integrator Details

Garrett Anderson
Prodigy 10 points

Other Parts Discussed in Thread: TPIC8101

I am in process of developing a control system for a dual fuel engine that runs on diesel and natural gas.  I am using a knock detection system that is based on the TPIC8101 and am having some trouble calibrating the system.  In an effort to reduce the time that I need the test cell and better understand how the system functions, I am trying to construct a simple Simulink Model to allow me to utilize some high speed data that I collected directly from the knock sensors. 

To verify my model I am trying to reproduce the simple example in the training pdf that I found here in the forum which I have attached.  I have not been able to do this, but I think that I do not fully understand how the integrator works.  The transfer function listed in the spec sheet mentions that you use the peak voltage of the knock signal.  Is this implying that the integrator has some sort of peak detection?  Are there details that are left out of the spec sheet that are implied?

 

Any information that you could provide me would be appreciated.  I hope that I am just missing something simple.

 

Thanks,

Garrett

  • 0
    TI__Mastermind 23810 points

    Garrett,

    The math for the system transfer equation is worked out on pages 13-14 of the training pdf, and the math model follows the example at the end of the pdf.  If you post your Simulink model, I'll take a quick look at it.  The integrator doesn't do any special peak extraction, but the transfer equation is assuming a sin wave input.

    -Clancy