Active suspension system
AssigneeBose Corporation
InventorsBrian Selden, Antonio Sangermano
Life of this patent
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Abstract
An active suspension system for a suspended device. The system has an electromagnetic actuator that produces force on the suspended device and that is powered by a power source, and a control system that provides control signals that cause the electromagnetic actuator to exert force on the suspended device. The control system is adapted to receive a turn-off signal that results in disabling the electromagnetic actuator from producing force on the suspended device. When the control system receives a turn-off signal it provides actuator turn-off control signals that cause the force exerted by the electromagnetic actuator to progressively transition to zero over a transition time period.
Claims19
An active suspension system for a suspended device, comprising:
- an electromagnetic actuator that produces force on the suspended device and that is powered by a power source;
- and
- a control system that provides control signals that cause the electromagnetic actuator to exert force on the suspended device, wherein the control system is adapted to receive a turn-off signal that results in disabling the electromagnetic actuator from producing force on the suspended device;
- wherein when the control system receives a turn-off signal it provides actuator turn-off control signals that cause the force exerted by the electromagnetic actuator to progressively transition to zero over a transition time period.
An active suspension system for a suspended device, comprising:
- an electromagnetic actuator that produces force on the suspended device and that is powered by a power source;
- a control system that provides control signals that cause the electromagnetic actuator to exert force on the suspended device, wherein the control system is adapted to receive a turn-off signal that results in disabling the electromagnetic actuator from producing force on the suspended device;
- wherein the turn-off signal is derived from suspension system sensors that comprise one or more of a power source voltage sensor, a current sensor, a vibration sensor, and a suspended device position sensor;
- and
- wherein a turn-off signal is generated upon one or more of the following conditions:
- (i) when the power source voltage is below a threshold voltage;
- (ii) when the vibration sensor senses an average vibration at or near zero;
- and
- (iii) when the position sensor senses a suspension velocity below a minimum velocity limit.
Dependencies are inferred from the claim text.