System and method for dynamically determining vehicle loading and vertical loading distance for use in a vehicle dynamic control system
A control system ( 18 ) and method for an automotive vehicle ( 10 ) includes a roll rate sensor ( 34 ) for generating a roll rate signal, a lateral acceleration sensor ( 32 ) for generating a lateral acceleration signal, a longitudinal acceleration sensor ( 36 ) for generating a longitudinal acceleration signal, and a yaw rate sensor ( 28 ) for generating a yaw rate signal. A safety device or system ( 44 ) and the sensors are coupled to a controller. The controller ( 26 ) determines an added mass and the height of the added mass on the vehicle, or a roll gradient, a roll acceleration coefficient, and/or a roll rate parameter that take into account the added mass and height from the roll rate, the lateral acceleration, the longitudinal acceleration, and the yaw rate of the vehicle, and controls the safety system in response thereto.
1. A method of controlling a safety system for a vehicle comprising:
generating a roll rate signal indicative of a roll rate of the vehicle over time;
determining a height of each change in mass onboard said vehicle over time as a function of said roll rate signal; and
adaptively controlling said safety system in response to the height of each change in mass determined over said time.
2. A method as recited in claim 1 wherein said height of each change in mass comprises a height of the center of gravity of said vehicle including the change in mass.
3. A method as recited in claim 1 wherein adaptively controlling said safety system comprises controlling a roll stability control system.
4. A method as recited in claim 1 wherein adaptively controlling said safety system is at least partially accomplished by a roll angle determination that is iteratively adjusted according to said height of each change in mass.
5. A method as recited in claim 1 wherein adaptively controlling said safety system is at least partially accomplished by control gains that are adjusted according to said height of each change in mass.