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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, control system, etc., can solve problems such as operator discomfort

Active Publication Date: 2020-04-21
STEERING SOLUTIONS IP HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Jitter noise causes discomfort to the operator of the EPS system

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

[0015] Referring now to the drawings, in which the present disclosure will be described with reference to specific embodiments but not limited thereto, it should 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.

[0016] 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 group) and memory, combinational logic, and / or other suitable components that provide the described functionali...

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Abstract

Technical solutions are described for attenuating dither noise in a steering system. An example method includes computing a torque command based on an input torque, and generating a current command corresponding to the torque command. Further, the method includes determining an adjustment parameter based on a plurality of steering system signals. Further, the method includes reducing dither noiseof the steering system by dynamically modifying a controller parameter value using the adjustment parameter. Further, the method includes generating a voltage command using the current command and themodified controller parameter value, the voltage command used to generate torque by a motor.

Description

Background technique [0001] As specified herein, judder noise refers to low frequency noise typically present in electric motor systems such as electric power steering (EPS) systems. Existing 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, among other reasons. Since the hand-held steering wheel torque signal is used for the purpose of providing assistance to the driver, noise in the sensed signal propagates through software as well as hardware (inverter, motor, etc.). The chattering noise causes discomfort to the operator of the EPS system. Therefore, it is desirable to reduce, if not completely eliminate, jitter noise in systems such as EPS systems. Contents of the invention [0002] A technical solution for reducing judder noise in a steering system i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04B60R16/037B60R16/023
CPCB62D5/04B60R16/0373B60R16/023B62D5/046B62D5/0463H02P6/10H02P21/14
Inventor M·艾克霍尔特P·普拉莫德
Owner STEERING SOLUTIONS IP HLDG