Continuous time controller based on SMC and disturbance observer for piezoelectric actuators [PDF]
, 2007 – In this work, analog application for the Sliding Mode Control (SMC) to piezoelectric actuators (PEA) is presented. DSP application of the algorithm suffers from ADC and DAC conversions and mainly faces limitations in sampling time interval.
Sabanovic, Asif +2 more
core
Piezoelectric Layer Transfer Process for MEMS
ProceedingsPiezoelectric MEMS devices were fabricated on 200 mm Si wafers using both deposited and layer-transferred PZT films. In both cases, the PZT-based devices showed ferroelectric and piezoelectric properties at the level of current state-of-the-art devices ...
Gwenael Le Rhun +4 more
doaj +1 more source
Experimental Validation of Two Types of Force Actuators: A Performance Comparison
SensorsThis paper experimentally investigates the performance of piezoelectric force actuators. Using the same encapsulated piezoelectric stack, an inertial-type actuator and a frame-type actuator are constructed for performance comparison.
Xishan Jiang +3 more
doaj +1 more source
High Quality Factor Silicon Cantilever Driven by PZT Actuator for Resonant Based Mass Detection [PDF]
, 2008 A high quality factor (Q-factor) piezoelectric lead zirconat titanate (PZT) actuated single crystal silicon cantilever was proposed in this paper for resonant based ultra-sensitive mass detection.
Ikehara, T. +5 more
core +1 more source
Low-Frequency Piezoelectric Hydrophone with High Sensitivity Based on a Piston Structure
AcousticsLow-frequency hydrophones are used to detect underwater low-frequency acoustic signals and are widely applied in marine science, resource exploration, environmental monitoring, and military operations.
Zhenming Piao +6 more
doaj +1 more source
Electromechanical Simulation of Actively Controlled Rotordynamic Systems with Piezoelectric Actuators [PDF]
, 1991 Theories and tests for incorporating piezoelectric pushers as actuator devices for active vibration control are discussed. It started from a simple model with the assumption of ideal pusher characteristics and progressed to electromechanical models with ...
Kascak, A. F. +3 more
core +1 more source
Optical characterization of ultra-high diffraction efficiency gratings
, 2006 We report on the optical characterization of an ultra-high diffraction efficiency grating in 1st order Littrow configuration. The apparatus used was an optical cavity built from the grating under investigation and an additional high reflection mirror ...
Braginsky +9 more
core +2 more sources
Optimizing Piezoelectric Stack Preload Bolts in Ultrasonic Transducers
Physics Procedia, 2015 AbstractThe selection of the preload bolt is often an afterthought in the design of Langevin type “sandwich” transducers, but quite often it is the root cause of failure for power ultrasonic applications. The main role of the preload bolt is to provide a “prestress” in the piezo stack to prevent interface “gapping” or tension in glued joints which can ...
DeAngelis, D.A. +2 more
openaire +1 more source
Evaluation of error bound for a DT sliding mode control with disturbance observer [PDF]
, 2006 In this paper an estimate of the upper bound of control error for discrete-time implementation of a Sliding Mode Control (DTSMC) combined with disturbance observer is investigated. Having in mind application to PZT high bandwidth actuators and since high
Abidi, Khalid Seyed +3 more
core
Bond Graph Modeling and Simulation of Hybrid Piezo-Flexural-Hydraulic Actuator
Engineering ProceedingsIn this study, a hybrid piezo-flexural-hydraulic actuator is modeled and simulated using bond graph methodology. The hybrid actuator comprises piezoelectric stack actuator, mechanical flexural amplifier, and hydraulic piston actuator.
Rudraksha Kelkar +3 more
doaj +1 more source