Somehow missed the last 6 responses before i posted this... but here it is anyway:
-------------------------------
i am a quad guy and i also don't see this working...
the biggest problem is not the PID as i believe you could make something capable of handling break/acceleration to maintain the pitch of the car...
the biggest problem is that the car doesn't know when it is in the air and therefore when to apply these corrections... every time you drive up a hill the car will think it is pitched up and will apply the brakes to try to correct that pitch. when the car doesn't pitch forward (because it is going up a hill) it will add more and more brake as the PID winds up until it comes to a complete stop (might even go backwards violently). And forget trying to do wheelies or backflips...
This works on a racing quad because you command the angle with the sticks and the PID just maintains the last commanded angle. On a car, you just tell it to go forwards and backwards and the angle is incidental to other external factors (terrain/ramps etc...).
There are other problems, but the above are showstoppers...
-------------------------------
i am a quad guy and i also don't see this working...
the biggest problem is not the PID as i believe you could make something capable of handling break/acceleration to maintain the pitch of the car...
the biggest problem is that the car doesn't know when it is in the air and therefore when to apply these corrections... every time you drive up a hill the car will think it is pitched up and will apply the brakes to try to correct that pitch. when the car doesn't pitch forward (because it is going up a hill) it will add more and more brake as the PID winds up until it comes to a complete stop (might even go backwards violently). And forget trying to do wheelies or backflips...
This works on a racing quad because you command the angle with the sticks and the PID just maintains the last commanded angle. On a car, you just tell it to go forwards and backwards and the angle is incidental to other external factors (terrain/ramps etc...).
There are other problems, but the above are showstoppers...
Last edited: