Velocity compensation control for electric steering systems
First Claim
1. An electric power steering control system incorporating motor velocity compensation comprising:
- an electric motor disposed in a vehicle to apply torque to a steerable wheel;
a torque sensor disposed in said vehicle for detecting a steering wheel torque and generating a torque signal indicative thereof;
a controller coupled to said torque sensor, and said electric motor;
wherein said controller generates a command to said electric motor for torque control, which includes said motor velocity compensation and said command responsive to at least one of said torque signal, and a motor velocity.
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Accused Products
Abstract
Disclosed herein is a method as well as a system for controlling an electric power steering system. The method includes: receiving a torque signal from a torque sensor responsive to a torque applied to a steering wheel; obtaining a motor velocity signal, the motor velocity signal indicative of a speed of an electric motor which applies torque to a steerable wheel; and generating a command for said electric motor with a controller coupled to the torque sensor, and the electric motor. The command includes torque control and motor velocity compensation, responsive to at least one of the torque signal, and a motor velocity signal. Also disclosed herein is a storage medium encoded with a computer program code for controlling an electric power steering system, the storage medium includes instructions for causing controller to implement the disclosed method. Further disclosed is a computer data signal for controlling an electric power steering system, the data signal comprising code configured to cause a controller to implement the disclosed method. Additionally, a method for optimizing controlling torque in an electric power steering system is disclosed. The method including: receiving a torque signal responsive to a torque applied to a steering wheel; obtaining a motor velocity; generating a command with a controller for the electric motor, where the command includes a torque control and motor velocity compensation, responsive to the torque signal, and the motor velocity. The performance of the torque control is responsive to a torque compensator, a high pass low pass structure, and motor velocity compensation.
121 Citations
77 Claims
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1. An electric power steering control system incorporating motor velocity compensation comprising:
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an electric motor disposed in a vehicle to apply torque to a steerable wheel;
a torque sensor disposed in said vehicle for detecting a steering wheel torque and generating a torque signal indicative thereof;
a controller coupled to said torque sensor, and said electric motor;
wherein said controller generates a command to said electric motor for torque control, which includes said motor velocity compensation and said command responsive to at least one of said torque signal, and a motor velocity. - 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)
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24. A method of controlling an electric power steering system, the method comprising:
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receiving a torque signal responsive to a torque applied to a steering wheel;
obtaining a motor velocity signal, said motor velocity signal indicative of a speed of an electric motor; and
generating a command for said electric motor, said command including torque control and motor velocity compensation, responsive to at least one of said torque signal, and a motor velocity signal. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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48. A method for optimizing controlling torque in an electric power steering system, the method comprising:
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receiving a torque signal responsive to a torque applied to a steering wheel;
obtaining a motor velocity signal;
generating a command with a controller for said electric motor, said command including torque control and motor velocity compensation, responsive to at least one of said torque signal and said motor velocity signal; and
wherein performance of said torque control is responsive to at least one of a torque compensator, a high pass low pass structure, and said motor velocity compensation. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73)
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74. A storage medium comprising:
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said storage medium encoded with a machine readable computer program code;
said code including instructions for causing a computer to implement a method for controlling an electric power steering system, the method comprising;
receiving a torque signal responsive to a torque applied to a steering wheel;
obtaining a motor velocity signal, said motor velocity signal indicative of a speed of an electric motor; and
generating a command for said electric motor, said command including torque control and motor velocity compensation, responsive to at least one of said torque signal and a motor velocity signal.
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75. A computer data signal comprising:
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said computer data signal comprising code configured to cause a processor to implement a method for controlling an electric power steering system, the method comprising;
receiving a torque signal responsive to a torque applied to a steering wheel;
obtaining a motor velocity signal, said motor velocity signal indicative of a speed of an electric motor; and
generating a command for said electric motor, said command including torque control and motor velocity compensation, responsive to at least one of said torque signal and a motor velocity signal.
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76. A electric power steering control system incorporating motor velocity compensation comprising:
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an electric motor disposed in a vehicle to apply torque to a steerable wheel;
a torque sensor disposed in said vehicle for detecting a steering wheel torque and generating a torque signal indicative thereof;
a controller coupled to said torque sensor, and said electric motor; and
said controller including;
means for receiving a torque signal responsive to a torque applied to a steering wheel;
means for obtaining a motor velocity signal, said motor velocity signal indicative of a speed of an electric motor; and
means for generating a command for said electric motor, said command including torque control and motor velocity compensation, responsive to at least one of said torque signal, and a motor velocity signal.
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77. A controller for controlling an electric power steering system, the controller comprising:
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means for receiving a torque signal responsive to a torque applied to a steering wheel;
means for obtaining a motor velocity signal, said motor velocity signal indicative of a speed of an electric motor; and
means for generating a command for said electric motor, said command including torque control and motor velocity compensation, responsive to at least one of said torque signal and a motor velocity signal.
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Specification