scholarly journals Modeling Hysteresis with Inertial-Dependent Prandtl-Ishlinskii Model in Wide-Band Frequency-Operated Piezoelectric Actuator

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Vahid Hassani ◽  
Tegoeh Tjahjowidodo ◽  
Albert D. Soetarto
Keyword(s):  
Piezoelectric Actuator ◽  
Piezoelectric Materials ◽  
Wide Band ◽  
Hysteretic Behavior ◽  
Nonlinear Phenomenon ◽  
Sensors And Actuators ◽  
Band Frequency ◽  
Control Framework ◽  
Stop Operator ◽  
Feed Forward Controller

One of the major problems occurring in many technical applications is the presence of the hysteretic behavior in sensors and actuators, which causes a nonlinear relationship between input and output variables in such devices. Since the nonlinear phenomenon of hysteresis degrades the performance of the piezoelectric materials and piezoelectric drive mechanisms, for example, in positioning control framework, it has to be characterized in order to mitigate the effect of the nonlinearity in the devices. This paper is aimed to characterize and model the hysteresis in typical piezoelectric actuators under load-free and preloaded circumstances incorporating the inertial effect of the system. For this purpose, the piezoelectric actuator is modeled as a mass-spring-damper system, which is expressed in terms of a stop operator as one of the essential yet efficient hysteresis operators in the Prandtl-Ishlinskii (PI) model. The reason of utilizing the stop operator in this study is for the sake of control purposes, as the stop operator plays as the inverse of the play operator in the PI model and can be used in a feed-forward controller scheme to suppress the effect of hysteresis in general control framework. The results reveal that this model exhibits better correspondence to the measurement output compared to that of the classical PI model.

A Generalized Inertial-Dependent Prandtl-Ishlinskii Model for Wide-Band Frequency Piezoelectric Actuator

2012 ◽  
Vol 622-623 ◽  
pp. 1357-1361
Author(s):  
Vahid Hassani ◽  
Tegoeh Tjahjowidodo
Keyword(s):  
Smart Materials ◽  
Hysteresis Loops ◽  
Wide Band ◽  
Industrial Applications ◽  
Nonlinear Phenomenon ◽  
Frequency Range ◽  
Band Frequency ◽  
Model Response ◽  
Stop Operator ◽  
Measured Response

Smart materials such as piezoceramics used in industrial applications, are subjected to nonlinear phenomenon of hysteresis which degrades the tracking performance of the actuator in operation. Depending on the operating frequency and input magnitude applied to the piezoelectric actuators (PA), the symmetric and asymmetric hysteresis loops can be observed. A generalized inertial-dependent Prandtl-Ishlinskii (PI) model is proposed in term of the stop operator to compensate the effects of nonlinearity in asymmetric hysteresis loops for PA. A nonlinear envelope function is assigned for the threshold of the stop operator to minimize the error between the model response and the measured response obtained through the experiments at frequency range from 200 Hz to 500 Hz.

Breath air measurement using wide-band frequency tuning IR laser photo-acoustic spectroscopy

2016 ◽  
Author(s):  
Yury V. Kistenev ◽  
Alexey V. Borisov ◽  
Dmitry A. Kuzmin ◽  
Anna A. Bulanova ◽  
Andrey A. Boyko ◽  
...  
Keyword(s):  
Frequency Tuning ◽  
Wide Band ◽  
Band Frequency ◽  
Ir Laser ◽  
Acoustic Spectroscopy ◽  
Photo Acoustic Spectroscopy

Compact Drive Electronics for Solid-State Actuators

2000 ◽  
Author(s):  
Jeffrey S. N. Paine ◽  
David S. Bennett ◽  
Carlos E. Cuadros
Keyword(s):  
Solid State ◽  
Power Electronics ◽  
Piezoelectric Material ◽  
Piezoelectric Actuator ◽  
Power Dissipation ◽  
Piezoelectric Materials ◽  
Piezoelectric Actuators ◽  
Linear Amplifier ◽  
Overall Efficiency ◽  
Electronics Packages

Abstract As piezoelectric actuators are developed for high strokes and/or high force applications, the amount of piezoelectric material used in the actuator must also increase. Reducing the size of drive electronics becomes difficult using traditional linear power electronics packages when applications require as much as 40 μF of piezoelectric load. In order to efficiently drive piezoelectric actuator systems, bi-directional systems (drivers that recover the energy put into the piezoelectric capacitor) must be used. Since less than 10% of the power going into the piezoelectric actuator is real versus the large reactive load used to power the piezoelectric materials, bidirectional systems have a much higher efficiency. A comparison is made between traditional linear and PWM amplifier systems and tailored piezoelectric bi-directional driver systems. Bi-directional systems have power dissipation levels up to 1/8th those of traditional linear amplifier systems. In the course of the research both linear and PWM concepts were investigated. A rationale for comparing the overall efficiency of drive electronics systems is presented. Some innovative efficient concepts for piezoelectric system drivers are presented and discussed.

Optimum Active Vehicle Suspensions With Actuator Time Delay

2000 ◽  
Vol 123 (1) ◽  
pp. 54-61 ◽  
Author(s):  
Nader Jalili ◽  
Ebrahim Esmailzadeh
Keyword(s):  
Optimal Control ◽  
Time Delay ◽  
Wide Band ◽  
Fixed Time ◽  
Realistic Model ◽  
Vertical Acceleration ◽  
Band Frequency ◽  
The Road ◽  
Stability Chart ◽  
The Stability

A new approach to optimal control of vehicle suspension systems, incorporating actuator time delay, is presented. The inclusion of time delay provides a more realistic model for the actuators, and the problem is viewed from a different perspective rather than the conventional optimal control techniques. The objective here is to select a set of feedback gains such that the maximum vertical acceleration of the sprung mass is minimized, over a wide band frequency range and when subjected to certain constraints. The constraints are dictated by the vehicle stability characteristics and the physical bounds placed on the feedback gains. Utilizing a Simple Quarter Car model, the constrained optimization is then carried out in the frequency domain with the road irregularities described as random processes. Due to the presence of the actuator time delay, the characteristic equation is found to be transcendental rather than algebraic, which makes the stability analysis relatively complex. A new scheme for the stability chart strategy with fixed time delay is introduced in order to address the stability issue. The stability characteristics are also verified utilizing other conventional methods such as the Michailov technique. Results demonstrate that the suspension system, when considering the effect of the actuator time delay, exhibits a completely different behavior.

Wide band frequency and in situ characterisation of high permittivity insulators (High-K) for H.F. integrated passives

2006 ◽  
Vol 83 (11-12) ◽  
pp. 2184-2188 ◽  
Author(s):  
T. Lacrevaz ◽  
B. Fléchet ◽  
A. Farcy ◽  
J. Torres ◽  
M. Gros-Jean ◽  
...  
Keyword(s):  
Wide Band ◽  
High Permittivity ◽  
Band Frequency ◽  
Integrated Passives ◽  
High K

scholarly journals Compact UWB microstrip antenna with quadruple band-notched characteristics for short distance wireless tele-communication applications

2018 ◽  
Vol 7 (1) ◽  
pp. 57 ◽  
Author(s):  
Kalyan Rayavaram ◽  
K.T.V Reddy ◽  
Padma Priya Kesari
Keyword(s):  
Short Distance ◽  
Microstrip Antenna ◽  
Wide Band ◽  
Antenna Gain ◽  
Outer Length ◽  
Band Frequency ◽  
X Band ◽  
Wireless Telecommunication ◽  
Bottom Side ◽  
Good Range

In this paper, the design and simulation of a compact ultra-wide band (UWB) microstrip antenna with quadruple band-notched characteristics for short-distance wireless telecommunication applications were explored. The design process of the antenna is carried on FR4 substrate with dielectric constant 4.4, loss tangent 0.02, thickness of 0. 8mm and the size of the proposed antenna are 30×20 mm2. The rectangular monopole antenna endures a rectangular radiating patch with chamfered bevel slots on the top side, and a defective ground planed on the bottom side of the substrate. To realize single, dual, triple and quadruple band notch characteristics, slot-1 is created on the patch to achieve first notch at 3.5 GHz, which eliminates WIMAX signal, slot-2 is created on the patch to achieve second notch at 4.6 GHz, which eliminates INSAT signal, slot-3 is created on the patch to achieve third notch at 5.5 GHz, which eliminates WLAN signal and also fourth notch is created at 9.5GHz which eliminates X-band frequency with slot-1 outer length. The proposed antenna is well miniaturized and can be easily integrated with any compact devices. The simulated result shows that proposed antenna gain a good range of UWB from (2.6 GHz to 13.4 GHz).

Sign in / Sign up

Export Citation Format

Share Document