Stabilized directional control systems and methods
First Claim
1. A system comprising:
- a logic device configured to receive one or more sensor signals and generate one or more controller signals to provide directional control for a vehicle, wherein the logic device is configured to;
receive a steering angle and a yaw rate of the vehicle, wherein the steering angle is based, at least in part, on a steering demand;
determine a nominal vehicle steering rate by processing the steering angle with a nominal vehicle predictor to produce the nominal vehicle steering rate, wherein the nominal vehicle predictor is implemented as a transfer function modeling dynamics of a nominal vehicle derived, at least in part, from a selection of vehicles; and
determine a nominal vehicle feedback signal based, at least in part, on a combination of the nominal vehicle steering rate and the yaw rate, wherein the nominal vehicle feedback signal is provided to adjust the steering demand, and wherein the processing the steering angle with the nominal vehicle predictor comprises processing the steering angle, adjusted by the nominal vehicle feedback signal, with the nominal vehicle predictor and receiving the nominal vehicle steering rate from the nominal vehicle predictor.
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Accused Products
Abstract
Techniques are disclosed for systems and methods to provide stabilized directional control for a vehicle. A directional control system for an embodiment may include a logic device adapted to receive directional data about a vehicle and determine nominal vehicle feedback from the directional data. The nominal vehicle feedback may be used to adjust a directional control signal provided to an actuator of a vehicle. The directional control signal may be limited to a value below an actuator rate limit before a directional control signal is adjusted by the nominal vehicle feedback. A directional control system may include a logic device, a memory, one or more sensors, one or more actuators/controllers, and modules to interface with users, sensors, actuators, and/or other modules of a vehicle.
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Citations
22 Claims
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1. A system comprising:
a logic device configured to receive one or more sensor signals and generate one or more controller signals to provide directional control for a vehicle, wherein the logic device is configured to; receive a steering angle and a yaw rate of the vehicle, wherein the steering angle is based, at least in part, on a steering demand; determine a nominal vehicle steering rate by processing the steering angle with a nominal vehicle predictor to produce the nominal vehicle steering rate, wherein the nominal vehicle predictor is implemented as a transfer function modeling dynamics of a nominal vehicle derived, at least in part, from a selection of vehicles; and determine a nominal vehicle feedback signal based, at least in part, on a combination of the nominal vehicle steering rate and the yaw rate, wherein the nominal vehicle feedback signal is provided to adjust the steering demand, and wherein the processing the steering angle with the nominal vehicle predictor comprises processing the steering angle, adjusted by the nominal vehicle feedback signal, with the nominal vehicle predictor and receiving the nominal vehicle steering rate from the nominal vehicle predictor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method comprising:
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receiving a steering angle and a yaw rate of a vehicle, wherein the steering angle is based, at least in part, on a steering demand for the vehicle; determining a nominal vehicle steering rate by processing the steering angle with a nominal vehicle predictor to produce the nominal vehicle steering rate, wherein the nominal vehicle predictor is implemented as a transfer function modeling dynamics of a nominal vehicle derived, at least in part, from a selection of vehicles; and determining a nominal vehicle feedback signal based, at least in part, on a combination of the nominal vehicle steering rate and the yaw rate, wherein the nominal vehicle feedback signal is provided to adjust the steering demand, and wherein the processing the steering angle with the nominal vehicle predictor comprises processing the steering angle, adjusted by the nominal vehicle feedback signal, with the nominal vehicle predictor and receiving the nominal vehicle steering rate from the nominal vehicle predictor. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A non-transitory machine-readable medium comprising a plurality of machine-readable instructions which when executed by one or more logic devices of a system are configured to cause the system to perform a method comprising:
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receiving a steering angle and a yaw rate of a vehicle, wherein the steering angle is based, at least in part, on a steering demand; determining a nominal vehicle steering rate by processing the steering angle with a nominal vehicle predictor to produce the nominal vehicle steering rate, wherein the nominal vehicle predictor is implemented as a transfer function modeling dynamics of a nominal vehicle derived, at least in part, from a selection of vehicles; and determining a nominal vehicle feedback signal based, at least in part, on a combination of the nominal vehicle steering rate and the yaw rate, wherein the nominal vehicle feedback signal is provided to adjust the steering demand, and wherein the processing the steering angle with the nominal vehicle predictor comprises processing the steering angle, adjusted by the nominal vehicle feedback signal, with the nominal vehicle predictor and receiving the nominal vehicle steering rate from the nominal vehicle predictor.
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Specification