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Author Topic: Lift Light  (Read 2118 times)

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Offline n49racer

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Re: Lift Light
« Reply #30 on: February 26, 2020, 05:07:46 PM »
Here's a screen shot showing our front and rear TPS suspension sensors. At first we were worried because it looks like is rising throughout the run. When we investigated we found we had the sensors set up wrong. They were reading backwards. So with smoothing we found that the front and rear were settling. The max on the rear was actually just over 1/4 inch, the front even less.

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Offline manta22

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Re: Lift Light
« Reply #31 on: February 26, 2020, 05:18:23 PM »
Does that software allow you to apply some low-pass filtering to your data?
Regards, Neil  Tucson, AZ

Offline n49racer

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Re: Lift Light
« Reply #32 on: February 26, 2020, 06:56:05 PM »
We found the filters need to be put on prior to the record. We are investigating now. If the data guy can do it, I repost

Ted
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Offline manta22

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Re: Lift Light
« Reply #33 on: February 26, 2020, 09:50:42 PM »
You might try DSP (digital signal processing).
Regards, Neil  Tucson, AZ

Offline datadoc

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Re: Lift Light
« Reply #34 on: February 27, 2020, 02:58:19 PM »
  Hi I've attached a new file only this time it is shown with a moving averaging filter applied to the two shock travel sensors output (front and rear) along with zeroing the data points at the start of the run. This time I hope the screen print will show up right side up.

Offline n49racer

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Re: Lift Light
« Reply #35 on: February 27, 2020, 03:43:54 PM »
Here is some shots with smoothing.
In the upper left x-y graph, Front reading increases by 20 ADC steps @ 0.0033?/step = 0.066? lift (upward is lift on front reading)
In upper right x-y graph, Rear reading increases by about 100 ADC steps @0.0042?/step = 0.42? drop (upward is drop for rear reading)

Something we did notice is that the front lifts at the end of the run at throttle cut and chute deployment. I was thinking...what if the front was just at the limit of lift and the chute was deployed., which is what most people would probably do.


« Last Edit: February 27, 2020, 03:56:06 PM by n49racer »
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