Results 201 to 210 of about 1,517 (234)

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
openaire   +1 more source

Performance dependence of a stick-slip piezoelectric actuator on the angle between the piezoelectric stack and mover

Review of Scientific Instruments, 2021
The angle between the piezoelectric stack (PES) and the mover would significantly affect the output performances of stick-slip piezoelectric actuators in theory; however, this issue has not been explored. Accordingly, in this paper, to investigate the effects of the angle, a stick-slip piezoelectric actuator with a changeable angle between the PES and ...
Kuifeng Wang, Zhi Xu, Xuan Li, Wuxiang Sun, Zhixin Yang, Hu Huang   +5 more
openaire   +2 more sources

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
openaire   +1 more source

Actuators using piezoelectric stacks and displacement enhancers

SPIE Proceedings, 2015
Actuators are used to drive all active mechanisms including machines, robots, and manipulators to name a few. The actuators are responsible for moving, manipulating, displacing, pushing and executing any action that is needed by the mechanism. There are many types and principles of actuation that are responsible for these movements ranging from ...
Yoseph Bar-Cohen, Stewart Sherrit, Xiaoqi Bao, Mircea Badescu, Hyeong Jae Lee, Phillip Walkemeyer, Shyh-Shiuh Lih   +6 more
openaire   +1 more source

Hysteresis independent on-line capacitance measurement for piezoelectric stack actuators

2011 24th Canadian Conference on Electrical and Computer Engineering(CCECE), 2011
Piezoelectric actuators are typically modeled as capacitive elements for control purposes. An important model parameter, clamped capacitance, is traditionally considered constant and obtained through offline measurements. However, the capacitance value changes with operating conditions such as electric fields, environmental temperatures, and aging.
Mohammad Islam, Rudolf J. Seethaler, David Mumford   +2 more
openaire   +1 more source

A High Authority Piezoelectric Stack Actuator for Structurally Flexible Mechanisms

Proceedings of the 2005 IEEE International Conference on Robotics and Automation, 2006
In this paper, the application of high control authority piezoelectric stack actuators, in short piezostack actuators, for active vibration control of long-reach robotic manipulators is studied. The idea is to include piezostack actuators in the base structure in order to strengthen its stiffness characteristics.
Mehrdad R. Kermani, Rajnikant V. Patel, Mehrdad Moallem   +2 more
openaire   +1 more source

Real time temperature measurement for multilayered piezoelectric stack actuators

2011 24th Canadian Conference on Electrical and Computer Engineering(CCECE), 2011
Self-heat generation is a common phenomenon in piezoelectric actuators used in high speed applications. Driving frequency and applied voltage are the two primary contributors to self-heat generation, which eventually rise the actuator temperature. Material properties such as dielectric properties, piezoelectric constants etc.
Mohammad Islam, Rudolf J. Seethaler, David Mumford   +2 more
openaire   +1 more source

Modal Active Vibration Control of a Rotor Using Piezoelectric Stack Actuators

Journal of Vibration and Control, 2007
This work deals with active vibration control of a rotating machine in both steady state and transient motion. Two stacks of piezoelectric ceramic orthogonally arranged in a plane localized at one of the bearings were used as the control actuators, using a modal control strategy.
Simoes, Ricardo, Der Hagopian, Johan, Mahfoudh, Jarir, Steffen Jr, Valden   +3 more
openaire   +2 more sources

An approach to modeling and on-line identification for piezoelectric stack actuator

SPIE Proceedings, 2007
The piezoelectric stack actuator used in Scanning Probe Microscopes (SPMs) always exhibits significant hysteresis and creep. The hysteresis and creep will reduce the positioning precision and produce the distortion in scanning images. Therefore it is necessary to develop a model with sufficient accuracy and stability to characterize the ...
Yueyu Wang, Xuezeng Zhao, Wei Chu
openaire   +1 more source

Study on the precise stepper actuator with piezoelectric stack pump

2010 IEEE 5th International Conference on Nano/Micro Engineered and Molecular Systems, 2010
This paper presents a piezoelectric stack pump for precise actuator. The piezoelectric pump is characterized by long travel range, precise flow, large driving force, etc. Simulations and experiments showed that the piezoelectric pump has high efficiency and good performance.
null Zunqiang Fan, null Jianfang Liu, null Jianqiao Li, null Zhigang Yang, null Lin He   +4 more
openaire   +1 more source