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Dither noise management in electric power steering systems

A steering system, noise technology, applied in the direction of electric steering mechanism, power steering mechanism, automatic steering control components, etc., can solve the EPS operator discomfort and other problems

Active Publication Date: 2019-09-17
STEERING SOLUTIONS IP HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Jitter noise causing discomfort to EPS operators

Method used

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  • Dither noise management in electric power steering systems
  • Dither noise management in electric power steering systems
  • Dither noise management in electric power steering systems

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Embodiment Construction

[0020] Referring now to the drawings, in which the present disclosure will be described with reference to particular embodiments without limitation, it is to be understood that the disclosed embodiments are merely illustrative of the disclosure, which may be embodied in various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present disclosure.

[0021] As used herein, the terms module and sub-module refer to one or more processing circuits (such as application-specific integrated circuits (ASICs), electronic circuits), processors (shared, dedicated or group) and memory, combinational logic, and / or other suitable components that provide the described functionality. It i...

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Abstract

Technical solutions are described for attenuating dither noise in a steering system. An example method includes computing multiple filter parameters, each filter parameter based on a corresponding signal in the steering system. The method further includes determining at least one final filter parameter from the plurality of filter parameters by arbitrating the plurality of filter parameters. The method further includes dynamically configuring a filter using the at least one final filter parameter. Further, the method includes filtering a motor torque command using the filter, a filtered motor torque command being applied to a motor to generate a corresponding amount of torque.

Description

technical field [0001] The present application relates generally to judder noise management in electric power steering systems. Background technique [0002] Jitter noise refers to low-frequency noise typically present in electric power steering (EPS) systems. Available evidence indicates that the main source of judder noise is the hand-held steering wheel torque sensor used in the EPS system. The sensed torque signal is noisy due to inherent noise in the sensed analog signal, quantization noise in the digital sensor and A / D converter. Chattering noise causes discomfort to the EPS operator. Therefore, it is desirable to reduce, if not completely eliminate, the dither noise in the EPS. Contents of the invention [0003] According to one or more embodiments, a method of attenuating judder noise in a steering system includes calculating a plurality of filter parameters, each filter parameter based on a corresponding signal in the steering system. The method also includes ...

Claims

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Application Information

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IPC IPC(8): B62D5/04
CPCB62D5/0457B62D5/046B62D5/0463B62D5/0481B62D6/08B62D6/02B62D6/008
Inventor P·普拉莫德M·艾克霍尔特K·纳姆布利M·A·汤姆金斯
Owner STEERING SOLUTIONS IP HLDG