Yaw rate sensor sensor mounting position

Hey!

I put the thread in this section as I'm not sure whereit fits exactly. Feel free to move it somewhere more appropriate if needed :)

I'm continuing to plan the build of my subaru GC8 and my goal will be to have the ecu be a part of the brain for the DCCD control.

The steering sensor has been acquired (not tested yet) and also a bosch 0 265 005 254 yaw rate sensor.

What I'll try to achieve is to sens understeer and oversteer with both combined and output a signal to the Map DCCD controler

This bosch sensor has both a yaw and G output. the G output is for longitudinal G measurement when the arrow is pointed forward.

My question is, if I put it 90° from the supposed correct position, will I be able to measure lateral G without having the sensor giving an erroneous data on the yaw sensor part? in other words is the yaw sensor position/direction sensitive as would a G sensor naturally be?

What do you guys think?

If you check the software, you may/should find there is a calibration setting that allows you to 'rotate' the sensor data as it's perceived by the device.

It actually bring to mind a question - is it possible for the device to compare the lateral acc'n and rotation (yaw) to indicate if the ratation is more driven from the rear - oversteer - or the front - understeer, if it's plan location in the vehicle is known? it would be 'relatively' simple if there was a lateral "G" sensor at the front and back, as they could be compared?

Might be something the smart folks here can answer?

Hi Gord,

I'm not sure what software you are refering to?

this bosch sensor is just one you find in many different vehicles (got it from breaker, I guess out of some mazda), and I have honestly no clue you could reprogram it?

Regarding your question for a combinaison of G's and yaw to determine under/oversteer, I guess I'm not smart enough to be able to answer that :D

My way of thinking was, a table of speed vs steering angle would give me some "target" yaw rates when I know the car is gripping normally, then I would compare that target with a current value and if yaw is high it means oversteer, if its lower it would mean understeer.

I'd just would like to benefit the integrated G meter to provide the latteral G info as I would find it more interesting to have as the longitudinal one at my basic level of data anlysis

If you have any better idea, for sure feel free to share :)

Sorry, I completely mis-understood what you were getting at.

You've got the sensor, what are you using to read it and/or log it? I was assuming you were using it with some sort of after-market ECU, or similar?

It depends on the construction of the sensing elements. It probably easiest to temporarily mount it in the car, datalog the outputs to confirm in each orientation unless you can find a data sheet for that part number.

Yes Gord that is correct, it is plugged onto 2 ANVolts inputs from a link ECU.

I just want to use it as a standalone sensor and integrate it in my DCCD control loop.

And for me the lateral G sensing would be more usefull than longitudinal, but the sensor was designed for longitudinal.

Hence my question if the yaw sensing would be affected from rotating the sensor 90°