System and method for characterizing vehicle body to road angle for vehicle roll stability control

A method of controlling a safety system of an automotive vehicle comprises:

• determining a wheel departure angle;
• determining a relative roll angle;
• determining a first body to road angle in response to the wheel departure angle and the relative roll angle;
• determining a reference bank angle;
• determining a global roll angle;
• determining a second body to road angle from the reference bank angle and the global roll angle;
• determining a final body to road angle from the first body to road angle and the second body to road angle;
• and
• controlling a safety system in response to the final body to road angle.

A method of controlling a safety system of an automotive vehicle comprising:

• determining a wheel departure angle;
• determining a relative roll angle;
• determining a first body to road angle in response to the wheel departure angle and the relative roll angle;
• determining a wheel lift status;
• when the wheel lift status is grounded, determining a second body to road angle based on a previous second body to road angle and a relative roll angle;
• when the wheel lift status is one wheel lifted, determining a second body to road angle based on a reference bank angle and a global roll angle;
• when the wheel lift status is two wheel lifted,
• determining a second body to road angle based on a reference bank angle based on a scaled first body to road bank angle and a global roll angle;
• determining a final body to road angle from the first body to road angle and the second body to road angle;
• and
• controlling a safety system in response to the final body to road angle.

A control system for an autorriotive vehicle having a safety system comprising:

• a controller programmed to perform the steps of:
• determining a first body to road angle from a wheel departure angle;
• determining a second body to road angle;
• determining a final body to road angle from the first body to road angle and the second body to road angle;
• and
• controlling the safety system in response to the final body to road angle.

A method of controlling a safety system of an automotive vehicle comprising:

• determining a relative roll angle and a wheel departure angle;
• determining a body to road angle in response to the wheel departure angle and the relative roll angle;
• and
• controlling a safety system in response to the body to road angle.