I’m not talking about predicting the road, but reacting/prepare to driver inputs before car has had time to really do much. Then further adjustments can be done progressively when car has had time to act, and accelerometer can pick up changes.Pre-emptive active suspension is a very difficult thing to achieve, especially as a retrofit package so there is an inevitability that such a system will be reactive. If using the CAN signals and bus then the system will still be reactive. Tractive has designed a system to minimise lag when acting on inputs that can be fitted relatively easily to many vehicles.
As you’re probably aware, CAN signals are used by some OEMs to control their active dampers, and Tractive sell their aftermarket controllers as an upgrade for some of these vehicles (cars and motorbikes). Using CAN was considered and discussed with RaceShock.uk at the start of the project but as Simon has explained above, discounted because the bus is too slow to effectively control the dampers valving. We also discussed fitting individual accelerometers on each suspension leg, and this is something that Tractive may introduce later though it will push up costs, so perhaps more appropriate for a GT class racing team rather than me! I’m wondering if using two of the existing accelerometers might be the way forward (one at the front and one rear, rather than a single unit near the centre of gravity) to allow signals to be measured at he ends of the car.
Il post some installation details later to provide an idea of what’s involved
I think noticeable improvements can be made by simply looking at brake on/off and steering wheel angle, then prepare differently depending on if you are in comfort or race. This could even be hardwired to controller, eliminating delay in bus.
Edit: what’s the benefit of fitting individual accelerometers? If a gyro type accelerometer is used, I do not really see the use? Gyros are used for whole ships to calculate how different points are moving compared to bottom. You do not need one sensor for each point. Easier for programmer, but more expensive and more parts to fail...