Vehicle parking assist system
A parking assist system for a vehicle is provided that includes a brake system having at least one wheel count encoder configured to output a wheel count signal and a controller configured to limit a velocity of the vehicle in a first mode. The controller is also configured to stop the vehicle at a target location in a second mode, and prevent overshoot of the target location by the vehicle in a third mode.
1. A parking assist system for a vehicle, comprising:
a brake system having at least one wheel count encoder configured to output a wheel count signal; and
a controller configured to limit a velocity of the vehicle in a first mode, configured to stop the vehicle at a target location in a second mode, and configured to prevent overshoot of the target location by the vehicle in a third mode by outputting a brake torque inversely proportional to a calculated distance to the target stop location of the vehicle.
2. The parking assist system of claim 1 , further comprising a scheduler configured to convert the wheel count signal into a linear distance traveled by the vehicle.
3. The parking assist system of claim 2 , wherein the second mode of the controller is operated in a proportional-derivative control based on a distance error signal.
4. The parking assist system of claim 1 , wherein the controller is configured to transition from the first mode to the second mode at a predetermined distance threshold from the target location.
5. The parking assist system of claim 4 , wherein the third mode of the controller is configured to stop the vehicle at the target location with essentially no overshoot.
6. A parking assist system for a vehicle, comprising:
a scheduler in electrical communication with a parking aid controller and a vehicle communication bus and configured to output feedback signals to a control module configured to operate in a first, a second and a third mode, wherein the control module in the third mode is configured to output a brake torque inversely proportional to a calculated distance to a target stop location of the vehicle.
7. The parking assist system of claim 6 , wherein the first mode is operated in a proportional-integral control based on a velocity error signal.
8. The parking assist system of claim 7 , wherein the second mode of the control module is configured to be operated in a proportional-derivative control based on a distance error signal.
9. The parking assist system of claim 8 , wherein the second mode of the control module is configured to stop the vehicle at the target location.
10. The parking assist system of claim 6 , wherein the feedback signals include at least a distance error signal and a velocity error signal.