Compensation using position for improved feel and stability in a steering system
First Claim
1. A steer-by-wire control system comprising:
- a road wheel unit responsive to a road wheel command signal for steering a vehicle, said road wheel unit includes a road wheel position sensor to produce and transmit a road wheel position signal and a road wheel force sensor to produce and transmit a road wheel force signal;
a steering wheel unit responsive to a steering wheel torque command signal, said steering wheel unit includes a steering wheel position sensor to produce and transmit a steering wheel position signal and a torque sensor to produce and transmit a feedback torque sensor signal;
a vehicle speed sensor to produce and transmit a vehicle speed signal;
a master control unit operatively connected to said vehicle speed sensor, said steering wheel unit, and said road wheel unit; and
wherein said steering wheel unit is also responsive to said steering wheel position signal.
12 Assignments
0 Petitions
Accused Products
Abstract
Disclosed herein are two exemplary steer-by-wire control systems comprising: a road wheel unit responsive to a road wheel command signal including a road wheel position sensor and a road wheel force sensor. The steer-by-wire control system also includes a steering wheel unit responsive to a steering wheel torque command signal, including a steering wheel position sensor and a torque sensor. The steer-by-wire control system further includes a vehicle speed sensor, and a master control unit operatively connected to the vehicle speed sensor, the steering wheel unit, and the road wheel unit. The road wheel unit is also responsive to the road wheel force signal and/or the steering wheel unit is also responsive to the steering wheel position signal. Further disclosed are two methods for steering a vehicle with a steer-by-wire system comprising: receiving a road wheel force signal, a road wheel position signal, a vehicle speed signal, a steering wheel position signal, and a feedback torque sensor signal, and generating a steering wheel torque command signal. The method for steering a vehicle further includes generating a road wheel command signal responsive to the road wheel position signal, the vehicle speed signal, the feedback torque sensor signal, and the steering wheel position signal. The method for steering a vehicle further includes generating a force compensated position command signal in a road wheel unit responsive to the road wheel force signal and/or generating a position compensated torque command signal in a steering wheel unit responsive to the steering wheel position signal.
48 Citations
107 Claims
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1. A steer-by-wire control system comprising:
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a road wheel unit responsive to a road wheel command signal for steering a vehicle, said road wheel unit includes a road wheel position sensor to produce and transmit a road wheel position signal and a road wheel force sensor to produce and transmit a road wheel force signal;
a steering wheel unit responsive to a steering wheel torque command signal, said steering wheel unit includes a steering wheel position sensor to produce and transmit a steering wheel position signal and a torque sensor to produce and transmit a feedback torque sensor signal;
a vehicle speed sensor to produce and transmit a vehicle speed signal;
a master control unit operatively connected to said vehicle speed sensor, said steering wheel unit, and said road wheel unit; and
wherein said steering wheel unit is also responsive to said steering wheel position signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method for steering a vehicle with a steer-by-wire system comprising:
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receiving a road wheel force signal;
receiving a road wheel position signal;
receiving a vehicle speed signal;
receiving a steering wheel position signal;
receiving a feedback torque sensor signal;
generating a steering wheel torque command signal responsive to said road wheel force signal, said vehicle speed signal, and said feedback torque sensor signal;
generating a road wheel command signal responsive to said road wheel position signal, said vehicle speed signal, said feedback torque sensor signal, and said steering wheel position signal; and
generating a position compensated torque command signal in a steering wheel unit responsive to said steering wheel position signal. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 58, 59, 60)
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54. A torque control system responsive to position comprising:
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a torque control unit responsive to a torque command signal for controlling torque, said torque control unit includes a position sensor to produce and transmit a position signal and a torque sensor to produce and transmit a torque sensor signal;
wherein said torque control unit comprises a control system responsive to said torque command signal, said torque sensor signal, and said position signal. - View Dependent Claims (55, 56, 57, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103)
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79. A method for controlling torque with a torque control system responsive to position, the method comprising:
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receiving a position signal from a position sensor;
receiving a torque sensor signal;
receiving a master torque command signal;
generating a position compensated torque command signal in a torque control unit responsive to said master torque command signal, said torque sensor signal, and said position signal; and
wherein said position compensated torque command signal, said position signal, and said torque sensor signal are employed in a torque control unit forming a control system. - View Dependent Claims (80, 81, 82, 83, 84, 85)
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104. A storage medium:
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encoded with a machine readable computer program code;
said code including instructions for causing a computer to implement a method for steering a vehicle with a steer-by-wire system, the method comprising;
receiving a road wheel force signal;
receiving a road wheel position signal;
receiving a vehicle speed signal;
receiving a steering wheel position signal;
receiving a feedback torque sensor signal;
generating a steering wheel torque command signal responsive to said road wheel force signal, said vehicle speed signal, and said feedback torque sensor signal;
generating a road wheel command signal responsive to said road wheel position signal, said vehicle speed signal, said feedback torque sensor signal, and said steering wheel position signal; and
generating a position compensated torque command signal in a steering wheel unit responsive to said steering wheel position signal.
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105. A computer data signal, said computer data signal comprising:
instructions for causing a computer to implement A method for steering a vehicle with a steer-by-wire system, the method comprising;
receiving a road wheel force signal;
receiving a road wheel position signal;
receiving a vehicle speed signal;
receiving a steering wheel position signal;
receiving a feedback torque sensor signal;
generating a steering wheel torque command signal responsive to said road wheel force signal, said vehicle speed signal, and said feedback torque sensor signal;
generating a road wheel command signal responsive to said road wheel position signal, said vehicle speed signal, said feedback torque sensor signal, and said steering wheel position signal; and
generating a position compensated torque command signal in a steering wheel unit responsive to said steering wheel position signal.
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106. A storage medium:
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encoded with a machine readable computer program code;
said code including instructions for causing a computer to implement a method for controlling torque with a torque control system responsive to position, the method comprising;
receiving a position signal from a position sensor;
receiving a torque sensor signal;
receiving a master torque command signal;
generating a position compensated torque command signal in a torque control unit responsive to said master torque command signal, said torque sensor signal, and said position signal; and
wherein said position compensated torque command signal, said position signal, and said torque signal are employed in a torque control unit forming a control system.
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107. A computer data signal, said computer data signal comprising:
instructions for causing a computer to implement a method for controlling torque with a torque control system responsive to position, the method comprising;
receiving a position signal from a position sensor;
receiving a torque sensor signal;
receiving a master torque command signal;
generating a position compensated torque command signal in a torque control unit responsive to said master torque command signal, said torque sensor signal, and said position signal; and
wherein said position compensated torque command signal, said position signal, and said torque signal are employed in a torque control unit forming a control system.
Specification