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Morrisman1

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  1. Like
    Morrisman1 got a reaction from dx4picco in Share your Math Channel List   
    Nice and simple ones:
    Smoothing of the fuel level sensor to prevent intermittant low fuel warnings and give am more stable reading:
    Parameter A: GP Input Fuel Level
    Equation: av(a,10)
     
    Calculating centre diff speed differential on AWD
    Parameter A: FL wheel speed
    Parameter B: FR wheel speed
    Parameter C: RL Wheel speed
    Parameter D: RR Wheel speed
    Equation: ((a+b)/2)-((c+d)/2)
    The output of that will be km/h, positive values for front wheel spin, negative for rear wheel spin (relative to each other)
     
    Calculating Error in GPS speed readout
    Parameter A: Driving wheel speed
    Parameter B: Driven wheel speed
    Parameter C: Longitudinal acceleration
    Parameter D:
    Equation: (a-b)/c
    The output of this hopefully should prove a theory that the error in GPS speed is directly proportional to the acceleration of the car. Just taking some data points from old logs makes this appear to be about 12.5km/h per G of longitudinal acceleration. If I can pin this down to be pretty consistent then I can trim my GPS speed input with the value and make a more accurate driven wheel speed value on my AWD. Basically acceleration supplemented GPS speed. Id like to see if there was a better way of doing this too.
     
    Im also looking at doing one to calculate rate of change of coolant pressure to feed into some engine protection for my head gasket, but I haven't yet worked out what I would use as a threshold for that protection to activate as I have never had a head gasket fail yet to collect data from. 
     
  2. Like
    Morrisman1 got a reaction from Calvin in Share your Math Channel List   
    Nice and simple ones:
    Smoothing of the fuel level sensor to prevent intermittant low fuel warnings and give am more stable reading:
    Parameter A: GP Input Fuel Level
    Equation: av(a,10)
     
    Calculating centre diff speed differential on AWD
    Parameter A: FL wheel speed
    Parameter B: FR wheel speed
    Parameter C: RL Wheel speed
    Parameter D: RR Wheel speed
    Equation: ((a+b)/2)-((c+d)/2)
    The output of that will be km/h, positive values for front wheel spin, negative for rear wheel spin (relative to each other)
     
    Calculating Error in GPS speed readout
    Parameter A: Driving wheel speed
    Parameter B: Driven wheel speed
    Parameter C: Longitudinal acceleration
    Parameter D:
    Equation: (a-b)/c
    The output of this hopefully should prove a theory that the error in GPS speed is directly proportional to the acceleration of the car. Just taking some data points from old logs makes this appear to be about 12.5km/h per G of longitudinal acceleration. If I can pin this down to be pretty consistent then I can trim my GPS speed input with the value and make a more accurate driven wheel speed value on my AWD. Basically acceleration supplemented GPS speed. Id like to see if there was a better way of doing this too.
     
    Im also looking at doing one to calculate rate of change of coolant pressure to feed into some engine protection for my head gasket, but I haven't yet worked out what I would use as a threshold for that protection to activate as I have never had a head gasket fail yet to collect data from. 
     
  3. Like
    Morrisman1 got a reaction from Vaughan in Share your Math Channel List   
    Nice and simple ones:
    Smoothing of the fuel level sensor to prevent intermittant low fuel warnings and give am more stable reading:
    Parameter A: GP Input Fuel Level
    Equation: av(a,10)
     
    Calculating centre diff speed differential on AWD
    Parameter A: FL wheel speed
    Parameter B: FR wheel speed
    Parameter C: RL Wheel speed
    Parameter D: RR Wheel speed
    Equation: ((a+b)/2)-((c+d)/2)
    The output of that will be km/h, positive values for front wheel spin, negative for rear wheel spin (relative to each other)
     
    Calculating Error in GPS speed readout
    Parameter A: Driving wheel speed
    Parameter B: Driven wheel speed
    Parameter C: Longitudinal acceleration
    Parameter D:
    Equation: (a-b)/c
    The output of this hopefully should prove a theory that the error in GPS speed is directly proportional to the acceleration of the car. Just taking some data points from old logs makes this appear to be about 12.5km/h per G of longitudinal acceleration. If I can pin this down to be pretty consistent then I can trim my GPS speed input with the value and make a more accurate driven wheel speed value on my AWD. Basically acceleration supplemented GPS speed. Id like to see if there was a better way of doing this too.
     
    Im also looking at doing one to calculate rate of change of coolant pressure to feed into some engine protection for my head gasket, but I haven't yet worked out what I would use as a threshold for that protection to activate as I have never had a head gasket fail yet to collect data from. 
     
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