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Understanding Driver Calibrations in s typical embedded system ?

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jani12

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Consider a typical Electronic Control Unit(ECU), let's say Powertrain ECU.

It's my understanding some drivers are calibrated, maybe current control output drivers. Another words, at end of manufacturing line, measurements are made and driver calibrations are stored in NVM for optimal performance.

At runtime, ECU software will fetch these calibrations to driver actuators.

Please provide comprehensive tutorial on driver calibration theory. There might be some slope and linear equations involved. How are typical driver calibrations scaled so only certain range of correction factors are stored?

What do these calibration values represent? Current?
 

jani12

Member
No, I need to test driver calibrations in our embedded system. Calibrations are not defined yet. I just wanted to know how typical drivers are calibrated so I can understand the calibrations in our system.
 

picbits

Well-Known Member
What systems are you using ?

In our systems, calibration is usually done by multi point cal then either a polynomial fit or linear fit is applied dependant on the level of accuracy required and the type of sensor being calibrated. Your company should have some kind of procedure for this.
 
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