Results 221 to 230 of about 7,615 (258)

Active control of structural vibration by piezoelectric stack actuators

Journal of Zhejiang University-SCIENCE A, 2005
Summary: This paper presents a general analytical model of flexible isolation system for application to the installation of high-speed machines and lightweight structures. Piezoelectric stack actuators are employed in the model to achieve vibration control of flexible structures, and dynamic characteristics are also investigated.
Niu, Junchuan, Zhao, Guoqun, Hu, Xiaxia
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A hysteresis model for a stacked-type piezoelectric actuator

Mechanics of Advanced Materials and Structures, 2016
ABSTRACTThe hysteresis nonlinearity in piezoelectric materials brings difficulties in controlling the systems. In order to mitigate the effect of hysteresis, such nonlinearity needs to be characterized and modeled under different load circumstances. For this purpose, the actuator is modeled in terms of a mass-spring-damper system utilizing the stop ...
Vahid Hassani, Tegoeh Tjahjowidodo
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Whole-spacecraft active vibration isolation using piezoelectric stack actuators

2010 3rd International Symposium on Systems and Control in Aeronautics and Astronautics, 2010
The problem of active vibration isolation for a new type of whole-spacecraft vibration isolation system (WSVIS) is studied in order to improve the whole-spacecraft vibration isolation performance. Piezoelectric stack is selected as the actuator, and its dynamical equations are formulated.
Ming-ming Li, Bo Fang, Li-guo Wang, Wen-hu Huang   +3 more
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Tracking control of a distributed-parameter piezoelectric stack actuator

2009 European Control Conference (ECC), 2009
The combination of flatness-based trajectory planning and feedforward control with asymptotically stabilizing dynamic feedback control is considered for the tracking control of a distributed-parameter model of a piezoelectric stack actuator.
Thomas Meurer, Thorsten Muller, Andreas Kugi   +2 more
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An electro-mechanically coupled SDOF piezoelectric stack actuator model

SPIE Proceedings, 2008
Piezoelectric actuators used in nano-positioning devices exhibit highly non-linear behavior and strong hysteresis, which limits the efficiency of conventional non-model-based controllers. This paper presents the first results of a free energy model based on the theory of thermal activation for single crystal piezoceramics that couples mechanical stress
Alexander York, Stefan Seelecke
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Ultrafast Displacement Actuation of Piezoelectric Stacks With Time-Sequence

IEEE Transactions on Industrial Electronics, 2017
Driving a piezoelectric stack with fast response and high output force is critical for its application. A novel ultrafast time-sequence driving method for piezoelectric stacks that could be used in fuel injectors is described and demonstrated. This technique is shown capable of reducing the response time of a piezoelectric stack by considering the ...
Xuejie Ba, Qiaosheng Pan, Bin Ju, Zhihua Feng   +3 more
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Properties and performance of RAINBOW piezoelectric actuator stacks

SPIE Proceedings, 1997
Stacks of RAINBOW high-displacement actuators are currently under consideration for use in scanning mechanisms capable of providing controlled travels on the order of 1 cm. In this work, actuator stacks were produced by stacking PZT-5A and PZT-5H RAINBOWs in a clamshell configuration.
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State estimation of nonlinear piezoelectric stack actuator hysteresis model

SPIE Proceedings, 2006
The state estimation of a non-linear model of a piezoelectric stack actuator showing hysteresis is proposed. Model uncertainties related to hysteresis effect in piezoelectric stack actuators, most prominently in higher frequency zone; can make the closed-loop control system unstable.
Jayesh L. Minase, Tien-Fu Lu, Frank Wornle   +2 more
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Self-moving cell linear motor using piezoelectric stack actuators

Smart Materials and Structures, 2005
In this paper, a self-moving cell linear motor (SCLM) using a piezoelectric stack actuator is designed, manufactured, and evaluated. The self-moving cell consists of an oval-shaped shell structure and piezoelectric stack actuator. The self-moving cell concept is different from a conventional inchworm linear motor because the SCLM has unified clamping ...
Jaehwan Kim, Jin-Ho Lee
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Modeling and Control of Piezoelectric Stack Actuators with Hysteresis

2013
Piezoelectric actuators are popularly applied as actuators in high precision systems due to their small displacement resolution, fast response and simple construction. However, the hysteresis nonlinear behavior limits the dynamic modeling and tracking control of piezoelectric actuators.
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