STUDY ON VIBRATION CHARACTERISTICS OF PZT ACTUATED MILDSTEEL AND ALUMINIUM CANTILEVER BEAMS (original) (raw)
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Performance Analysis of Active Vibration Control in Cantilever Beam using PZT
2017
JCHPS Special Issue 11: July 2017 www.jchps.com Page 78 Performance Analysis of Active Vibration Control in Cantilever Beam using PZT F. Fredrick Gnanaraj*, K.R. Vijaya Kumar Department of ECE, St. Peter's University, Chennai Department of ECE, Dr. M.G.R. Educational and Research Institute University, Chennai *Corresponding author: E-Mail: fredraj1@gmail.com ABSTRACT Vibrations are significant in engineering problems. The vibrations that occur in any type of applications may be desirable or undesirable vibrations and control of undesirable vibrations is very vital. The controlling methods applied practically to control vibrations may be either active or passive method. This experimental work proves that the piezoelectric actuators when placed, along the beam length and very near to the Cantilever beam end which is fixed, controls the vibrations caused by the step input on a Cantilever beam rapidly and efficiently.
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Composite Structures, 2015
Traditionally, the vibrations of bituminous beam are damped by inherent damping properties. In this research, smart materials are used to control and reduce the vibration of such beams. The study focused on the passive piezoelectric vibration shunt control technique. Firstly, the finite element method was used in order to determine optimal design and location of piezoelectric transducers. Based on the results obtained from a simple Euler Bernoulli beam evaluation, up to 42% of bending vibration reduction was gained by using smart beam. Secondly, the analytical study of passive piezoelectric vibration shunt control of cantilever beam was undertaken. The equation of motion of a composite beam (cantilever beam bonded with a PZT patch) using Hamilton's principle and Galerkin's method has been derived.
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Vibration control is an essential problem in different structure. Smart material can make a structure smart, adaptive and self-controlling so they are effective in active vibration control. Piezoelectric elements can be used as sensors and actuators in flexible structures for sensing and actuating purposes. In this paper we use PZT elements as sensors and actuator to control the vibration of a cantilever beam. Also we study the effect of different types of controller on vibration.
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This paper deals with the Active Vibration control of beam like structures with distributed piezoelectric actuator and sensor layers bonded on top and bottom surfaces of the beam. The patches are located at the different positions to determine the better control effect. The piezoelectric patches are placed on the free end, middle end and fixed end. The study is demonstrated through simulation in MATLAB for various controllers like Proportional Controller by Output Feedback, Proportional Integral Derivative controller (PID) and Pole Placement technique. A smart cantilever beam is modeled with SISO system. The entire structure is modeled using the concept of piezoelectric theory, Euler-Bernoulli beam theory, Finite Element Method (FEM) and the State Space techniques. The numerical simulation shows that the sufficient vibration control can be achieved by the proposed method.
Active Vibration Control of A Cantilever Beam Using PZT PATCH (SP-5H)
— Research on Active Vibration Control System (AVCS) is being carried out to reduce structural vibrations caused by unwanted vibrations in many application areas such as in space, aircraft structures, satellites, automobiles and civil structures (bridges), particularly at low frequencies. In this paper; we have discussed Active Vibration Control technique by using piezoelectric patch (SP-5H) as an actuator. Result from ANSYS and experimental results were compared. We also studied effectiveness of AVC technique, particularly an open loop control system. The experimental results are presented for the cantilever beam excited at one of its natural frequency using active vibration control system. For open loop control system, less reduction were observed and the reasons were discussed for it.
Active Vibration Control of Smart Structure Using PZT Patches
Procedia Computer Science, 2016
The assembly that serves an engineering function is called as structure and structure that exhibits intelligence, efficiency, adaptability, accurate response and optimum performance is termed as a smart structure. Though, due to these advantages smart structures are used in many high end applications like aerospace engineering, microelectronics productions, precise positioning and automation industries, active vibration control of these structures is extremely important. This is because; mechanical vibrations in the structure can have detrimental effects as they can damage sensitive components of the structure or even the whole structure. Vibration control basically suppresses the effect of external disturbances and keeps the structure in its equilibrium position. In this paper, vibration control analysis of the structure for forced vibrations is carried out. The smart structure considered here, is a finite and flat beam-like fiber cantilever structure with PZT patches attached to its surface. Along with vibration control analysis effect of changing positions of PZT patches on this analysis is also discussed in this paper.
ACTIVE VIBRATION CONTROL OF SMART PIEZO CANTILEVER BEAM USING PID CONTROLLER
In this paper the modelling and Design of a Beam on which two Piezoelectric Ceramic Lead Zirconate Titanate ( PZT) patches are bonded on the top and bottom surface as Sensor/Actuator collocated pair is presented. The work considers the Active Vibration Control (AVC) using Proportional Integral Derivative (PID) Controller. The beam is assumed as Euler-Bernoulli beam. The two PZT patches are also treated as Euler-Bernoulli beam elements. The contribution of mass and stiffness of two PZT patches in the design of entire structure are also considered. The beam is modelled using three Finite Elements. The patches can be bonded near the fixed end, at middle or near the free end of the beam as collocated pair. The design uses first two dominant vibratory modes. The effect of PZT sensor/actuator pair is investigated at different locations of beam in vibration control. It can be concluded from the work that best result is obtained when the PZT patches are bonded near the fixed end.
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2011
In active vibration control the vibration of a structure is reduced by using opposite directional force to the structure. Now a day"s active vibration control is frequently being used in aircraft, submarine, automobile, helicopter blade, naval vessel. In this project a smart plate (aluminum plate) with one pair of piezoelectric lamination is used to study the active vibration control. The smart plate consists of rectangular aluminum beam modeled in cantilever configuration with surface bonded piezoelectric patches. The study uses ANSYS-12 software to derive the finite element model of the smart plate. Based on this model, the optimal sensor locations are found and actual smart beam is produced. In this experiment we find a suitable control methodology by which we optimize the controller gain to get more effective vibration control with minimum control input.
The aim of this study is to design a Linear Quadratic Regulator (LQR) controller for the active vibration control of a smart flexible cantilever beam. The mathematical model of the smart beam was created on the basis of the Euler-Bernoulli beam theory and the piezoelectric theory. State-space and finite element models used in the LQR controller design were developed. In the finite element model of the smart beam containing piezoelectric sensors and actuators, the beam was divided into ten finite elements. Each element had two nodes and two degrees of freedom were defined for each node, transverse displacement, and rotation. Two Piezoelectric ceramic lead Zirconate Titanate (PZT) patches were affixed to the upper and lower surfaces of the beam element as pairs of sensors and actuators. The location of the piezoelectric sensor and actuator pair changed and they were consecutively placed on the fixed part, the middle part, and the free end of the beam. In each case, the design of the LQR controller was made considering the first three dominant vibratory modes of the beam. The effect of the position of the sensor-actuator pair on the beam on the vibration damping capability of the controller was investigated. The best damping performance was found when the sensor-actuator pair was placed at the fixed end.
Active Vibration Control of a Fixed Beam using PZT Patches
2016
Piezoelectric materials have the ability to produce a contraction or extension when an electrical charge is applied to them. By integrating piezoelectric elements into slender structures, structural vibration and oscillations can be reduced by measuring them and actuating in real time. In this paper, two pairs of PZT patches are used to study the Active vibration control. The position of the PZT sensors and actuators is found out by using software ANSYS. The Active Vibration control of fixed beam is done by using PZT patches as sensor and actuator. The vibrations induced in the beam due to wind are suppressed by the actuators.