Attitude sensing system for an automotive vehicle relative to the road
First Claim
1. A system for controlling a safety system of an automotive vehicle comprising:
- a longitudinal acceleration sensor generating a longitudinal acceleration signal;
a vehicle speed sensor generating a vehicle speed signal;
a lateral acceleration sensor generating a lateral acceleration signal;
a yaw rate signal generating a yaw rate signal; and
a controller coupled to the longitudinal acceleration sensor, the vehicle speed sensor, the lateral acceleration sensor and the yaw rate sensor, said controller determining a reference pitch in response to the longitudinal acceleration signal and the vehicle speed signal and a reference roll angle in response to said yaw rate signal, the wheel speed signal and said lateral acceleration signal, said controller determining a roll stability index and a pitch stability index, said controller determining an adjusted pitch angle in response to the reference pitch angle and the pitch stability index and an adjusted roll angle in response to the reference roll angle and the roll stability index, said controller controlling the safety system in response to the adjusted roll angle and the adjusted pitch angle.
2 Assignments
0 Petitions
Accused Products
Abstract
A system (18) for controlling a safety system (44) of an automotive vehicle (10) includes a longitudinal acceleration sensor (36), a vehicle speed sensor (20), a lateral acceleration sensor (32), a yaw rate sensor, and a controller (26). The controller (26) determines a reference pitch in response to the longitudinal acceleration signal and the vehicle speed signal and a reference roll angle in response to the yaw rate signal, the wheel speed signal and the lateral acceleration signal. The controller (26) determines a roll stability index and a pitch stability index. The controller (26) determines an adjusted pitch angle in response to the reference pitch angle and the pitch stability index and an adjusted roll angle in response to the reference roll angle and the roll stability index. The controller (26) controls the safety system (44) in response to the adjusted roll angle and the adjusted pitch angle.
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Citations
33 Claims
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1. A system for controlling a safety system of an automotive vehicle comprising:
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a longitudinal acceleration sensor generating a longitudinal acceleration signal; a vehicle speed sensor generating a vehicle speed signal; a lateral acceleration sensor generating a lateral acceleration signal; a yaw rate signal generating a yaw rate signal; and a controller coupled to the longitudinal acceleration sensor, the vehicle speed sensor, the lateral acceleration sensor and the yaw rate sensor, said controller determining a reference pitch in response to the longitudinal acceleration signal and the vehicle speed signal and a reference roll angle in response to said yaw rate signal, the wheel speed signal and said lateral acceleration signal, said controller determining a roll stability index and a pitch stability index, said controller determining an adjusted pitch angle in response to the reference pitch angle and the pitch stability index and an adjusted roll angle in response to the reference roll angle and the roll stability index, said controller controlling the safety system in response to the adjusted roll angle and the adjusted pitch angle. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for controlling a safety system of an automotive vehicle comprising:
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a longitudinal acceleration sensor generating a longitudinal acceleration signal; a vehicle speed sensor generating a vehicle speed signal; and a controller coupled to the longitudinal acceleration sensor and the vehicle speed sensor, said controller determining a reference pitch in response to the longitudinal acceleration signal and the vehicle speed signal, said controller determining a pitch stability index, said controller determining an adjusted pitch angle in response to the reference pitch angle and the pitch stability index, said controller controlling the safety system in response to the adjusted pitch angle. - View Dependent Claims (9, 10, 11, 12)
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13. A system for controlling a safety system of an automotive vehicle comprising:
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a vehicle speed sensor generating a vehicle speed signal; a lateral acceleration sensor generating a lateral acceleration signal; a yaw rate signal generating a yaw rate signal; and a controller coupled to the vehicle speed sensor, the lateral acceleration sensor and the yaw rate sensor, said controller determining a reference roll angle in response to said yaw rate signal, said lateral acceleration signal and the wheel speed signal, said controller determining a roll stability index, said controller determining an adjusted roll angle in response to the reference roll angle and the roll stability index, said controller controlling the safety system in response to the adjusted roll angle. - View Dependent Claims (14, 15, 16, 17)
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18. A method of controlling a safety system comprising:
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determining a reference roll angle or a reference pitch angle, determining a roll stability index or a pitch stability index; providing a roll observer having a roll observer gain or a pitch observer having a pitch observer gain, said roll observer gain being a function of the reference roll angle and roll stability index and said pitch observer gain being a function of the reference pitch angle and the pitch stability index; integrating the roll observer to obtain a roll angle or the pitch observer to obtain a pitch angle; and controlling a safety system in response to the roll angle or the pitch angle. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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27. A method of controlling a safety system comprising:
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determining a reference roll angle or a reference pitch angle, determining a roll stability index or a pitch stability index; providing a roll observer having a roll observer adjustment or a pitch observer adjustment, said roll observer adjustment determined in response to a roll observer gain and the reference roll angle, said pitch observer determined in response to the reference pitch angle and a pitch observer gain; integrating the roll observer to obtain a roll angle or the pitch observer to obtain a pitch angle; and controlling a safety system in response to the roll angle or the pitch angle. - View Dependent Claims (28, 29, 30, 31, 32, 33)
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Specification