Complementary force and position control for an automotive 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 road wheel unit is also responsive to said road wheel force signal.
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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 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 farther 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.
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Citations
110 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 road wheel unit is also responsive to said road wheel force 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, 28)
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29. 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 force compensated position command signal in a road wheel unit responsive to said road wheel force signal. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54)
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55. A position control system responsive to load comprising:
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a position control unit responsive to a master position command signal for controlling position, said position control unit includes a position sensor to produce and transmit a position signal and a force sensor to produce and transmit a force signal; and
wherein said position control unit comprises a control system responsive to said master position command signal, a position signal from said position sensor, and said force signal. - View Dependent Claims (56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80)
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81. A method for controlling position with a position control system responsive to load, the method comprising:
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receiving a force signal;
receiving a position signal from a position sensor;
receiving a master position command signal;
generating a force compensated position command signal in a position control unit responsive to said master position command signal, said force signal said position signal; and
wherein said force compensated position command signal, said position signal, and said force signal are employed in a position control unit forming a control system. - View Dependent Claims (82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106)
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107. 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 force compensated position command signal in a road wheel unit responsive to said road wheel force signal.
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108. 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 force compensated position command signal in a road wheel unit responsive to said tie rod force signal.
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109. 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 position with a position control system responsive to load, the method comprising;
receiving a force signal;
receiving a position signal from a position sensor;
receiving a master position command signal;
generating a force compensated position command signal in a position control unit responsive to said master position command signal, said force signal said position signal; and
wherein said force compensated position command signal, said position signal, and said force signal are employed in a position control unit forming a control system.
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110. A computer data signal, said computer data signal comprising:
instructions for causing a computer to implement a method for controlling position with a position control system responsive to load, the method comprising;
receiving a force signal;
receiving a position signal from a position sensor;
receiving a master position command signal;
generating a force compensated position command signal in a position control unit responsive to said master position command signal, said force signal said position signal; and
wherein said force compensated position command signal, said position signal, and said force signal are employed in a position control unit forming a control system.
Specification