NDLI: Real-Time Disturbance Compensation with Accelerometers & Piezoelectric-Driven Mechanism

Content Provider	IEEE Xplore Digital Library
Author	Tan, U.X. Latt, W.T. Tanjaya, M. Wirawan, H.T. Shee, C.Y. Ang, W.T.
Copyright Year	2007
Description	Author affiliation: Nanyang Technol. Univ., Singapore (Tan, U.X.; Latt, W.T.; Tanjaya, M.; Wirawan, H.T.; Shee, C.Y.; Ang, W.T.)
Abstract	Disturbance / vibration reduction is critical in many applications. One example is disk drive industry. With the advance in optical disk drive technology, the off-track or off-focusing error caused by disturbance is limiting the performance. Instead of going with the more familiar approach like vibration absorber, a real-time disturbance compensation without much phase lag is proposed. In this paper, to illustrate the idea of real-time compensation, a one dof cancellation of tremor is performed. Instantaneous motion due to the disturbance is sensed by an accelerometer inertial measurement unit (IMU). Modeling of the accelerometer is done to provide better readings. The compensation motion is provided by manipulating a piezoelectric-driven flexure-based mechanism. Due to the existence of backslash in revolute joints, flexure-based mechanism is proposed to achieve better result. Piezoelectric actuator is proposed because of its high frequency and precision. The hysteretic non-linearity of the piezoelectric actuator is modeled using Prandtl-Ishlinskii operator. Based on this model, an open-loop inverse feed-forward controller is implemented to accurately provide the required motion.
Starting Page	410
Ending Page	415
File Size	447441
Page Count	6
File Format	PDF
ISBN	1424407893
DOI	10.1109/CIRA.2007.382879
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Accelerometers Disk drives Piezoelectric actuators Optical sensors Measurement units Frequency Hysteresis Inverse problems Feedforward systems Motion control Flexure-Based Mechanism Disturbance Piezoelectric
Content Type	Text
Resource Type	Article

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