Electric power steering mode determination and transitioning
First Claim
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1. An electric power steering system comprising:
- an advance driver assist module configured to;
determine an operation mode that indicates a level of autonomous driving, the operation mode being a first operation mode from a plurality of levels of autonomous driving comprising at least a fully automated operation mode, a semi-automated operation mode, and a non-automated operation mode;
detect a change from the first operation mode to a second operation mode; and
transition performance of the electric power steering system from the first operation mode to the second operation mode, the transitioning comprising;
determining a blend factor for adjusting the performance of the electric power steering system that is operating using a first calibration factor of the first operation mode to a second calibration factor of the second operation mode, the blend factor based on a vehicle speed;
scaling the second calibration factor using the blend factor; and
generating a steering system command using the scaled second calibration factor.
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Abstract
Technical solutions are described for facilitating an electric power steering (EPS) system to determine an operating mode of a vehicle that is equipped with the EPS, where the operating mode is indicative of a level of autonomous driving being used by the vehicle. The technical solutions further facilitate detecting a change in the operating mode of the vehicle, and facilitating a transition in computing an assist signal for the EPS system during the transition between the operating modes.
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Citations
18 Claims
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1. An electric power steering system comprising:
an advance driver assist module configured to; determine an operation mode that indicates a level of autonomous driving, the operation mode being a first operation mode from a plurality of levels of autonomous driving comprising at least a fully automated operation mode, a semi-automated operation mode, and a non-automated operation mode; detect a change from the first operation mode to a second operation mode; and transition performance of the electric power steering system from the first operation mode to the second operation mode, the transitioning comprising; determining a blend factor for adjusting the performance of the electric power steering system that is operating using a first calibration factor of the first operation mode to a second calibration factor of the second operation mode, the blend factor based on a vehicle speed; scaling the second calibration factor using the blend factor; and generating a steering system command using the scaled second calibration factor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An advance driver assist module for an electric power steering system, which is configured to:
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determine an operation mode that indicates a level of autonomous driving, the operation mode being a first operation mode from a plurality of levels of autonomous driving comprising at least a fully automated operation mode, a semi-automated operation mode, and a non-automated operation mode; detect a change from the first operation mode to a second operation mode; and transition performance of the electric power steering system from the first operation mode to the second operation mode, the transitioning comprising; determining a blend factor for adjusting the performance of the electric power steering system that is operating using a first calibration factor of the first operation mode to a second calibration factor of the second operation mode, the blend factor based on a vehicle speed; scaling the second calibration factor using the blend factor; and generating a steering system command using the scaled second calibration factor. - View Dependent Claims (11, 12, 13, 14)
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15. A method for providing assist signal to an electric power steering system, the method comprising:
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determining an operation mode of the electric power steering system, the operation mode indicates a level of autonomous driving of a vehicle equipped with the electric power steering system, the operation mode being a first operation mode from a plurality of levels of autonomous driving comprising at least a fully automated operation mode, a semi-automated operation mode, and a non-automated operation mode; detecting a change from the first operation mode to a second operation mode; and transitioning performance of the electric power steering system from the first operation mode to the second operation mode, the transitioning comprising; determining a blend factor for adjusting the performance of the electric power steering system that is operating using a first calibration factor of the first operation mode to a second calibration factor of the second operation mode, the blend factor based on a vehicle speed; scaling the second calibration factor using the blend factor; and generating a steering system command using the scaled second calibration factor. - View Dependent Claims (16, 17, 18)
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Specification