Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Analysis of Vibration Noise Spectrum in Motor-Driven Power Steering System

Motor-Driven Power Steering 시스템의 진동 소음 스펙트럼 분석

  • Received : 2018.03.14
  • Accepted : 2018.03.23
  • Published : 2018.03.31
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Abstract

Unlike the hydraulic power steering (HPS) system, which operates by the high pressure of a fluid obtained from the engine power, the motor-driven power steering (MDPS) system uses an electric motor to steer the wheel without consuming engine power. To steer the wheel with an electric motor, a worm wheel and a worm gear rotating between the steering shaft and motor are required. Any imperfection during the construction of an MDPS system or in a composing part creates noise and vibration, which can be sensed by a driver. To solve the noise and vibration problems, each part must be designed to not resonate with other parts. In this work, we developed the measurement and analysis systems to obtain the noise and the vibration of an automobile MDPS system. A signal analyzer was equipped with a 96 kHz, 24-bit ADC and a 150 MHz digital signal processor. The predetermined threshold value of the vibration in the MDPS system was used to determine the pass/fail, and the results were displayed on the screen. Our system can be used in the fabrication line to swiftly determine any imperfections in the MDPS system construction.

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References

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