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US 9,102,209 B2Granted
Anti-causal vehicle suspension
AssigneeBose Corporation
InventorsMarco Giovanardi, David J. Warkentin
Life of this patent
Estimating the term…
Abstract
A vehicle suspension and wheel damper using anti-causal filtering. Information from in front of a wheel or information about an operating condition of a vehicle is used to anti-causally determine a response of an active suspension associated with the wheel.
Claims20
A method for operating a suspension system associated with a wheel of a vehicle, comprising:
- identifying a road disturbance prior to the wheel's encountering the road disturbance;
- determining, prior to the wheel's encountering the road disturbance, an estimated response of the suspension system to the road disturbance;
- reversing with respect to time the estimated response of the suspension system to provide an anti-causal response of the suspension system,
- determining a force for outputting by a controllable force source associated with the suspension system, where the determining is based on the time reversed anti-causal response of the suspension system, and
- outputting the determined force by the controllable force source to reduce vertical motion of the vehicle wheel.
2 more elements
A method for operating an active suspension system associated with the wheel of a vehicle, comprising:
- identifying a road disturbance prior to the wheel's encountering the road disturbance;
- determining, prior to the wheel's encountering the road disturbance, what at least two states of the vehicle would be when the wheel encounters the road disturbance to provide estimated state values;
- determining, prior to the wheel's encountering the road disturbance, a force to cause the at least two states of the vehicle to have the estimated state values to provide an anti-causally determined force;
- and
- causing a controllable force source, associated with the active suspension system, to apply the anti-causally determined force so that the values of the at least two states of the vehicle are the estimated state values when the wheel encounters the road disturbance.
2 more elements
A method for operating an active suspension for a vehicle, comprising:
- anti-causally calculating a force to be applied to a portion of the vehicle;
- calculating a predicted behavior of the portion of the vehicle resulting from the force being applied to the portion of the vehicle;
- comparing the predicted behavior with the actual behavior of the vehicle to provide an error signal;
- determining a correcting force to reduce the error signal;
- combining the correcting force with the anti-causally calculated force to provide a combined force;
- and
- applying the force to the vehicle portion.
4 more elements
Dependencies are inferred from the claim text.