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US 2001/0042655 A1Published application
Synchronized/variable force feedback power steering
AssigneeCrown Equipment Corporation
InventorNed E. Dammeyer
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AssigneeCrown Equipment Corporation
InventorNed E. Dammeyer
Estimating the term…
A steering tiller and a steered wheel(s) of a steer-by-wire steering system of a materials handling vehicle are synchronized with one another and a virtual coupling force is exerted on the steering tiller to maintain synchronization. A motor or brake is associated with the steering tiller and the positions of the tiller and the steered wheel(s) are monitored and used to control the motor or brake to apply the virtual coupling force to the tiller. Thus, an operator of the vehicle receives feedback corresponding approximately to that experienced in a mechanically coupled steering system so that synchronism is maintained between the tiller and the steered wheel(s). In this way, if the operator attempts to oversteer or outrun the steered wheel(s) by rapid rotation of the tiller, a force proportional to the operator's action is applied to oppose that action. Synchronization can be set up with the tiller set to a desired position selected by the operator, for example to selected a desired tiller spinner straight ahead position.
A method for operating a steer-by-wire power steering system for a materials handling vehicle comprising the steps of:
A method for operating a steer-by-wire power steering system for a materials handling vehicle comprising the steps of:
A method for operating a steer-by-wire power steering system for a materials handling vehicle comprising the steps of:
Dependencies are inferred from the claim text.