A new parabolic sliding mode filter augmented by linear low-pass filter and its application to position control

[+] Author and Article Information
Myo Thant Sin Aung

Department of Mechatronic Engineering, Yangon Technological University, Yangon, Myanmar

Zhan Shi

Department of Mechanical Engineering, Kyushu University, Fukuoka 819-0395, Japan

Ryo Kikuuwe

Department of Mechanical Engineering, Kyushu University, Fukuoka 819-0395, Japan

1Corresponding author.

ASME doi:10.1115/1.4037732 History: Received November 27, 2016; Revised June 21, 2017


This paper proposes a new sliding mode filter augmented by a linear low-pass filter for mitigating the effect of high frequency noise. It is based on the derivation of three new variants of Jin et al.'s (2012) parabolic sliding mode filter (J-PSMF) and investigation on their frequency-response characteristics. The new filter is developed by augmenting one of the variants of J-PSMF by a second order linear low-pass filter. It has better balance between the noise attenuation and signal preservation than both linear low-pass filters and J-PSMF. The effectiveness of the new filter is experimentally evaluated on a DC servo motor equipped with an optical encoder. This paper also shows the application of the proposed filter to a positioning system under PDD<sup>2</sup> (proportional, derivative, and second derivative) control, which successfully realizes the noise attenuation and the non-overshooting response simultaneously.

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