An adaptive filtering technique for vibration reduction of a rotational LOS control system and frequency noise reduction of an imaging system

Byeong Hak Kim, Min Young Kim

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

In mechatronic systems using electric signals to drive control systems, driving signals including the frequency band of the unwanted signals, such as resonant frequencies and noise frequencies, can affect the accuracy of the controlled system and can cause serious damage to the system due to the resonance phenomenon of the mechatronic system. An LOS (Line of Sight) control unit is used to automatically rotate the gimbal system with a video imaging system generally mounted on modern aerial vehicles. However, it still suffers from natural frequency variation problems due to variations of operational temperature. To prevent degradation in performance, this paper proposes an adaptive filtering technique based on real-time noise analysis and adaptive notch-filtering for LOS control systems, and verifies how our proposed method maintains the LOS stabilization performance. Additionally, this filtering technique can be applied to the image noise filtering of the video imaging system. It is designed to reduce image noises generated by switching circuits or power sources. The details of design procedures of the proposed filtering technique and the experiments for the performance verification are described in this paper.

Original languageKorean
Pages (from-to)1014-1022
Number of pages9
JournalJournal of Institute of Control, Robotics and Systems
Volume20
Issue number10
DOIs
StatePublished - 1 Oct 2014

Keywords

  • Adaptive filtering
  • Image noise reduction
  • LOS control system

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