A Control Strategy for Electro-hydrostatic Actuator Considering Static Friction, Resonance, and Oil Leakage
A Control Strategy for Electro-hydrostatic Actuator Considering Static Friction, Resonance, and Oil Leakage
カテゴリ: 論文誌(論文単位)
グループ名: 【D】産業応用部門(英文)
発行日: 2019/03/01
タイトル(英語): A Control Strategy for Electro-hydrostatic Actuator Considering Static Friction, Resonance, and Oil Leakage
著者名: Sho Sakaino (JST, PRESTO/Graduate School of Science and Engineering, Saitama University), Tomoki Sakuma (Graduate School of Science and Engineering, Saitama University), Toshiaki Tsuji (Graduate School of Science and Engineering, Saitama University)
著者名(英語): Sho Sakaino (JST, PRESTO/Graduate School of Science and Engineering, Saitama University), Tomoki Sakuma (Graduate School of Science and Engineering, Saitama University), Toshiaki Tsuji (Graduate School of Science and Engineering, Saitama University)
キーワード: electro-hydrostatic actuator,hydraulic motor,two-mass resonant system,self resonance cancellation
要約(英語): Electro-hydrostatic actuators (EHAs) are hydraulic systems that operate without control valves, making them a compact, cheap, and highly energy efficient system. However, resonance, static friction, and oil leakage degrade their control performance. Three controllers are integrated to overcome these issues. First, static friction is suppressed by a feedback modulator (FM). Input torque is quantized to exceed the maximum static friction force, and quantization errors are suppressed by the FM. Second, resonance is canceled out by a self resonance cancellation (SRC) technique. In the SRC, both angle responses of a hydraulic pump and a hydraulic motor are measured, and the rigid body mode is extracted. Then, resonance becomes unobservable, changing the system as a second-order system. Third, modeling errors, including oil leakage, are suppressed by a self resonance cancellation disturbance observer (SRCDOB). As the SRCDOB is implemented in the rigid body mode, the cut-off frequency of the SRCDOB can be greater than that of most common disturbance observers. This combination of controllers drastically improves the control performance, and it enables control system design based on frequency.
本誌掲載ページ: 279-286 p
原稿種別: 論文/英語
電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejjia/8/2/8_279/_article/-char/ja/
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