Context aware active suspension control system
First Claim
1. A method for reducing energy consumption in an active vehicle suspension system, comprising:
- calculating a desired control command for a vehicle maneuver;
applying an actual force command to the active vehicle suspension system, wherein the actual force command is equal to or less than the desired control command; and
reducing energy consumption by the active suspension system during the maneuver by decreasing the actual force command from a first value to a second value.
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Accused Products
Abstract
A method for reducing power consumption in an active suspension system through the selective use of high performance, associated with high power demand, only in situations instantaneously deemed to provide a high ratio of benefit to cost. Input events are classified ahead of time, and are identified during operation of the system, ahead of time if possible through the use of look-ahead sensing or statistical analysis, or at the beginning of the event through the use of motion sensing. Once an event is detected, an estimation of the cost and benefits for an intervention of the active suspension system is made, and the intervention is scaled in a way to provide a good compromise. Relying on the nonlinearity of the cost and benefit expressions, this leads to overall reduced power consumption with small loss in perceived benefit.
277 Citations
40 Claims
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1. A method for reducing energy consumption in an active vehicle suspension system, comprising:
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calculating a desired control command for a vehicle maneuver; applying an actual force command to the active vehicle suspension system, wherein the actual force command is equal to or less than the desired control command; and reducing energy consumption by the active suspension system during the maneuver by decreasing the actual force command from a first value to a second value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for adjusting an active vehicle suspension system control algorithm, comprising:
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identifying an event selected from a group consisting of a vehicle event and a wheel event; computing a performance factor as a function of a tradeoff between intervention benefit and intervention cost for the event; reducing energy consumption of an active vehicle suspension system by adjusting at least one parameter of a control algorithm based on the performance factor, wherein the control algorithm controls at least one aspect of the active vehicle suspension system; and applying the adjusted control algorithm to the active vehicle suspension system during the event. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method for controlling an active vehicle suspension system, the method comprising:
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detecting a vehicle event; analyzing the vehicle event to determine whether the active suspension system can be used to deliver a benefit to an occupant of the vehicle during at least one portion of the vehicle event; determining an amount of energy required for delivering the benefit to the occupant during the at least one portion of the vehicle event; comparing the required energy to the benefit to determine if the active vehicle suspension should be controlled to deliver the benefit; and intervening with the active vehicle suspension to deliver the benefit if it is determined that the benefit should be delivered. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A method for operating an active vehicle suspension system, the method comprising:
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determining an amount of energy required by the active suspension system to deliver a benefit to an occupant during at least one portion of a vehicle event; and controlling the active suspension system to intervene with the vehicle event during the at least one portion of the vehicle event when the resulting benefit due to the intervention is above a first threshold. - View Dependent Claims (33, 34, 35)
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36. A method for reducing energy consumption in an active vehicle suspension system, the method comprising:
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operating an active suspension system in a first mode during a first portion of at least one of a road event and a vehicle event at a first level of performance to produce a first level of benefit; and operating the active suspension system in a second mode during a second portion of the at least one of the road event and the vehicle event at a second level of performance to produce a second level of benefit. - View Dependent Claims (37, 38, 39, 40)
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Specification