Integrated vehicle control system using dynamically determined vehicle conditions
First Claim
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1. A system for controlling a system in a vehicle comprising:
- a pitch rate sensor generating a pitch rate signal;
a lateral acceleration sensor generating a lateral acceleration signal;
a longitudinal acceleration sensor generating a longitudinal acceleration signal;
a yaw rate sensor generating a yaw rate signal; and
a controller coupled to the sensors, said controller determining a roll characteristic in response to the pitch rate signal, the lateral acceleration signal, the longitudinal acceleration signal and the yaw rate signal, said controller generating a control signal in response to the roll characteristic.
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Abstract
A vehicle includes a control system that is used to control a vehicle system. The control system determines a roll condition in response to a yaw rate sensor and a pitch rate sensor without having to use a roll rate sensor. A relative roll angle, relative pitch angle, global roll angle, and global pitch angle may also be determined. A safety system may be controlled in response to the roll condition, roll angle, or the pitch angles individually or in combination.
231 Citations
39 Claims
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1. A system for controlling a system in a vehicle comprising:
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a pitch rate sensor generating a pitch rate signal;
a lateral acceleration sensor generating a lateral acceleration signal;
a longitudinal acceleration sensor generating a longitudinal acceleration signal;
a yaw rate sensor generating a yaw rate signal; and
a controller coupled to the sensors, said controller determining a roll characteristic in response to the pitch rate signal, the lateral acceleration signal, the longitudinal acceleration signal and the yaw rate signal, said controller generating a control signal in response to the roll characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of controlling a system in a vehicle comprising:
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generating a pitch rate signal;
generating a lateral acceleration signal;
generating a longitudinal acceleration signal;
generating a yaw rate signal;
determining a roll characteristic in response to the pitch rate signal, the lateral acceleration signal, the longitudinal acceleration signal and the yaw rate signal; and
controlling the system in response to the roll characteristic. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A method of controlling a system in a vehicle comprising:
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generating a pitch rate signal;
generating a lateral acceleration signal;
generating a longitudinal acceleration signal;
generating a yaw rate signal;
generating a roll rate signal;
determining a first global roll angle and a first global pitch angle in response to the roll rate signal, the lateral acceleration signal, the longitudinal acceleration signal and the yaw rate signal;
determining a second global roll angle and a second global pitch angle in response to the pitch rate signal, the lateral acceleration signal, the longitudinal acceleration signal and the yaw rate signal;
combining the first global roll angle and the second global roll angle to form a final global roll angle;
combining the first global pitch angle and the second global pitch angle to form a final global pitch angle;
controlling the system in response to the final global roll angle and the final global pitch angle. - View Dependent Claims (24, 25, 26, 27)
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28. A method of controlling a vehicle system comprising:
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determining a lateral acceleration;
determining a moment due to lateral tire forces in response to the lateral acceleration;
determining a first coefficient related to vehicle mass and spring roll rate;
determining a second coefficient related to vehicle spring rate and roll inertia;
determining a normalized vertical suspension force induced roll moment using the first coefficient, the second coefficient and the moment;
determining a relative roll angle in response to the normalized vertical suspension induced roll moment; and
controlling the system in response to the relative roll angle. - View Dependent Claims (29, 30, 31, 32)
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33. A method of controlling a vehicle system comprising:
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determining a longitudinal acceleration;
determining a moment due to longitudinal tire forces in response to the longitudinal acceleration;
determining a first coefficient related to vehicle mass and spring pitch rate;
determining a second coefficient related to vehicle spring rate and pitch inertia;
determining a normalized vertical suspension force induced pitch moment using the first coefficient, the second coefficient and the moment;
determining a relative pitch angle in response to the normalized vertical suspension induced pitch moment; and
controlling the system in response to the relative pitch angle. - View Dependent Claims (34, 35, 36, 37)
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38. A method comprising:
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determining a roll characteristic;
determining a yaw characteristic;
determining a side slip angle;
comparing the roll characteristic to a roll threshold;
comparing the yaw characteristic to a yaw threshold;
comparing the side slip angle to a side slip angle threshold;
in response to comparing the roll characteristic to the roll threshold, comparing the yaw characteristic to the yaw threshold, comparing the side slip angle characteristic to the side slip angle threshold, determining a dominant characteristic; and
operating a control system in response to the dominant characteristic. - View Dependent Claims (39)
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Specification