Active suspending
First Claim
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1. An apparatus comprising:
- a vehicle having a plant, the plant having a plant position;
an active suspension including an electromagnetic actuator coupled to the plant; and
a force bias eliminator having the dynamic characteristic of a variable stiffness spring coupled to the plant;
a source of at least one motion signal indicative of motion of the plant;
wherein the active suspension further comprises a control module responsive to the at least one motion signal to provide a bias control signal to the force bias eliminator to cause the force bias eliminator to output a bias force for causing the actuator to experience a zero mean load;
the active suspension being configured to have a plurality of operation modes, including an active mode and a passive mode.
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Abstract
A method for actively suspending a real plant in a vehicle includes modifying a control signal on the basis of a difference between a property of the real plant, as indicated by the response of the real plant to the control signal, and a property of a nominal plant.
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Citations
12 Claims
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1. An apparatus comprising:
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a vehicle having a plant, the plant having a plant position; an active suspension including an electromagnetic actuator coupled to the plant; and a force bias eliminator having the dynamic characteristic of a variable stiffness spring coupled to the plant; a source of at least one motion signal indicative of motion of the plant; wherein the active suspension further comprises a control module responsive to the at least one motion signal to provide a bias control signal to the force bias eliminator to cause the force bias eliminator to output a bias force for causing the actuator to experience a zero mean load; the active suspension being configured to have a plurality of operation modes, including an active mode and a passive mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for suspending a seat using an active suspension system including an electromagnetic actuator, a source of at least one motion signal indicative of motion of the seat and a force bias eliminator having the dynamic characteristic of a variable stiffness spring;
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wherein the force bias eliminator further comprises a control module responsive to the at least one motion signal to provide a bias control signal to the force bias eliminator, the method comprising; selectively switching between operating the active suspension in an active mode and in a passive mode; controlling the seat position in the active mode with the actuator and the force bias eliminator and controlling the seat position in the passive mode with the force bias eliminator. - View Dependent Claims (10, 11, 12)
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Specification