Active Vibration Control of a Space Truss Using PZT Stack Actuator

1999 ◽  
Author(s):  
Gangbing Song ◽  
John Vlattas ◽  
Scott E. Johnson ◽  
Brij N. Agrawal
Keyword(s):  
Vibration Control ◽  
Piezoelectric Ceramic ◽  
Proof Mass ◽  
Active Vibration Control ◽  
Force Transducer ◽  
Experimental Results ◽  
Naval Postgraduate School ◽  
Double Integral ◽  
Space Truss ◽  
Active Vibration

Abstract This paper presents design, implementation and experimental results of active vibration control of Naval Postgraduate School (NPS) Space Truss using a piezoelectric ceramic stack actuator. The NPS space truss represents a flexible spacecraft structure which may support interferometer, antenna, and other vibration-sensitive instrumentation. To simulate the effects of a spacecraft disturbance on the truss, a proof mass actuator is incorporated on the structure to excite the truss. To reduce the vibrations caused by the proof mass actuator, an active strut member is installed along a diagonal of the base bay of the truss. The active strut element consists of a piezoelectric ceramic actuator stack, a force transducer, and mechanical interfaces. An integral plus double-integral force controller is designed to suppress vibration of the truss. Experimental results demonstrate that the active piezoceramic strut actuator can effective reduce truss vibration.

Two-Level Control Structure of Magnetic Bearings

1993 ◽  
Vol 5 (5) ◽  
pp. 438-442 ◽  
Author(s):  
Nobuyoshi Taguchi ◽  
◽  
Takakazu Ishimatsu ◽  
Takashi Shimomachi ◽  
◽  
...  
Keyword(s):  
Control System ◽  
Vibration Control ◽  
Control Structure ◽  
Active Vibration Control ◽  
Experimental Results ◽  
Magnetic Bearings ◽  
Active Magnetic Bearings ◽  
Level Control ◽  
Whirling Motion ◽  
Active Vibration

Active magnetic bearings have several advantages over conventional mechanical and fluid bearings. However, when the magnetic bearings are used at high rotational speeds, whirling motions and vibrations synchronized with the rotation of the rotor should be considered. In order to suppress these unfavorable vibrations of rotor which is supported by magnetic bearings, we have developed an active vibration control system with a two-level control structure. Experimental results show that our active bearings system effectively suppresses the whirling motion.

scholarly journals Simultaneous active vibration control and health monitoring of structures. Experimental results

2010 ◽  
Vol 2 (2) ◽  
pp. 118-127 ◽  
Author(s):  
URSU Ioan ◽  
◽  
TECUCEANU George ◽  
TOADER Adrian ◽  
BERAR Vladimir
Keyword(s):  
Vibration Control ◽  
Health Monitoring ◽  
Active Vibration Control ◽  
Experimental Results ◽  
Active Vibration

Active Vibration Control of a Hanged Rectangular Plate Partially Submerged Into Fluid by Using Piezoelectric Sensors and Actuators

2014 ◽  
Author(s):  
Moon K. Kwak ◽  
Dong-Ho Yang
Keyword(s):  
Vibration Control ◽  
Rectangular Plate ◽  
Natural Vibration ◽  
Active Vibration Control ◽  
Vibration Characteristics ◽  
Experimental Results ◽  
Piezoelectric Sensors ◽  
Sensors And Actuators ◽  
Piezoelectric Sensors And Actuators ◽  
Active Vibration

This paper is concerned with the active vibration control of a hanged rectangular plate partially submerged into a fluid by using piezoelectric sensors and actuators bonded to the plate. A dynamic model for the plate is derived by using the Rayleigh-Ritz method and the fluid effect is modeled by the virtual mass increase that is obtained by solving the Laplace equation. The natural vibration characteristics of the plate in air obtained theoretically are in good agreement with the experimental results. The changes in natural frequencies due to the presence of fluid were measured and compared to the theoretical predictions. Experimental results show that the theoretical predictions are in good agreement with the experimental results. The natural vibration characteristics of the plate both in air and in water are used for the active vibration control design. In this study, the multi-input and multi-output positive position feedback controller was designed based on the natural vibration characteristics and implemented by using a digital controller. Experimental results show that the vibration of the hanged rectangular plate both in air and partially submerged into a fluid can be successfully suppressed by using piezoelectric sensors and actuators.

Active Vibration Control of Smart Structure Based on Alternate Driving SMA Actuators

2010 ◽  
Vol 39 ◽  
pp. 61-66 ◽  
Author(s):  
En Yu Jiang ◽  
Xiao Jin Zhu ◽  
Yong Shao ◽  
Zheng Liang Wang
Keyword(s):  
Vibration Control ◽  
Control Method ◽  
Thermal Hysteresis ◽  
Active Vibration Control ◽  
Deformation Characteristic ◽  
Smart Structure ◽  
Experimental Results ◽  
Control Performance ◽  
Restoring Force ◽  
Active Vibration

Though with its big restoring force and large deformation characteristic, shape memory alloy (SMA) is commonly used in the research of active vibration control for smart structure, the presence of its thermal hysteresis often leads to bad control performance. A vibration control method based on alternate multichannel driving SMA is proposed to improve the SMA based smart structural vibration control performance by reducing the effect of thermal hysteresis of SMA. The technical methods, the design of the experimental structure, the construction of the experimental platform is illustrated, with the principle and operating process of the experiment and experimental results described. By embedding the SMA driving elements into the epoxy substrate and mounted epoxy plate into the framework of the aircraft prototype, experimental analysis and verification is done. The experimental results show that alternate multichannel driving of SMA for vibration suppression of smart structure is feasible, and the performance is improved to a certain extent.

Modification of Space Truss Vibration Using Piezoelectric Actuator

2015 ◽  
Vol 811 ◽  
pp. 246-252
Author(s):  
S.M. Nowruzpour Mehrian ◽  
S. Zamani Mehrian
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Natural Frequency ◽  
Piezoelectric Actuator ◽  
Piezoelectric Ceramic ◽  
Active Element ◽  
Force Transducer ◽  
Ansys Software ◽  
Double Integral ◽  
Space Truss

The aim of this paper is finite element presentation for vibration response of the intelligent structure (consisting peizoeectric members) and modification of the response. The active element consists of a piezoelectric ceramic actuator stack, a force transducer and mechanical interfaces. An integral plus double-integral force controller is designed to suppress vibration of the truss. In this paper, in order to find the best piezoelectric operator’s location in spatial truss and optimizing the performance of the member by changing the property of the members, an algorithm is presented to achieve desired natural frequency. Therefore, finite element method of spatial truss is extracted. The results are admitted by ANSYS software. At the end, an example to show the application of the relations is given.

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