- Patent Title: Characterization of stiction condition in a manual steering gear
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Application No.: US14718465Application Date: 2015-05-21
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Publication No.: US09604665B2Publication Date: 2017-03-28
- Inventor: Ian Y. Hwa , Roderick L. Lemmer , Gregory K. Peterson , William K. Adams
- Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Agency: Quinn Law Group, PLLC
- Main IPC: B62D5/04
- IPC: B62D5/04 ; B62D3/12 ; B62D6/08 ; G01L5/22 ; G01M17/06

Abstract:
A method for characterizing a stiction condition in a manual steering gear includes transmitting a steering input control signal to a rotary actuator, and rotating a steering shaft with constant acceleration, via the rotary actuator, in response to the steering input control signal. A steering output torque is determined while rotating the steering shaft with the constant acceleration, receiving the steering output torque via the controller, and executing a control action when a rate of the received steering output torque exceeds a threshold rate indicative of the stiction condition. A system includes a rotary actuator, a manual steering gear having a steering shaft connected to the rotary actuator, a torque transducer for measuring a steering output torque imparted to the steering shaft by the actuator, and a controller programmed as set forth above.
Public/Granted literature
- US20160339943A1 CHARACTERIZATION OF STICTION CONDITION IN A MANUAL STEERING GEAR Public/Granted day:2016-11-24
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