The vibration suppression of solar panel based on smart structure

2020 ◽  
Vol 125 (1283) ◽  
pp. 244-255
Author(s):  
G. Ma ◽  
M. Xu ◽  
J. Tian ◽  
X. Kan
Keyword(s):  
Finite Element ◽  
Vibration Control ◽  
Vibration Suppression ◽  
Fibre Composite ◽  
Smart Structure ◽  
Control Voltage ◽  
Control Force ◽  
Solar Panels ◽  
Flexible Bodies ◽  
Loop Control

ABSTRACTThis paper provides a solution to the active vibration control of a microsatellite with two solar panels. At first, the microsatellite is processed as a finite element model containing a rigid body and two flexible bodies, according to the principles of mechanics, and that the dynamic characteristics are solved by modal analysis. Secondly, the equation involving vibration control is established according to the finite element calculation results. There are several actuators composed of macro fibre composite on the two solar panels for outputting control force. Furthermore, the control voltage for driving actuator is calculated by using fuzzy algorithm. It is clear that the smart structure consists of the flexible bodies and actuators. Finally, the closed-loop control simulation for suppressing harmful vibration is established. The simulation results illustrate that the responses to the external excitation are decreased significantly after adopting fuzzy control.

Optimal Vibration Control of Membrane Structures with In-Plane Polyvinylidene Fluoride Actuators

2020 ◽  
Vol 20 (08) ◽  
pp. 2050095
Author(s):  
Yifan Lu ◽  
Qi Shao ◽  
Fei Yang ◽  
Honghao Yue ◽  
Rongqiang Liu
Keyword(s):  
Vibration Control ◽  
Polyvinylidene Fluoride ◽  
Vibration Suppression ◽  
Flexible Structures ◽  
Control Force ◽  
Membrane Structures ◽  
Optimization Criteria ◽  
High Flexibility ◽  
And Control ◽  
Actuator Placement

Different kinds of membrane structures have been proposed for future space exploration and earth observation. However, due to the low stiffness, high flexibility, and low damping properties, membrane structures are likely to generate large-amplitude (compared to the thickness) vibrations, which may lead to the degradation of their working performance. In this work, the governing equations are established at first, taking into account the modal control force induced by the polyvinylidene fluoride (PVDF) actuator. The optimal vibration control of the membrane structure is explored subsequently. A square PVDF actuator is attached on the membrane to achieve the vibration suppression. The influence of actuator position and control gains on the vibration control performance are studied. The optimal criteria for actuator placement and energy allocation are developed. Several case studies are numerically simulated to demonstrate the validity of the proposed optimization criteria. The analytical results in this study can serve as guidelines for optimal vibration control of membrane structures. Additionally, the proposed optimization criteria can be applied to active control of different flexible structures.

Finite Element Modeling of a Highly Flexible Rotating Beam for Active Vibration Suppression With Piezoelectric Actuators

2007 ◽  
Author(s):  
Gabriele Gilardi ◽  
Bradley J. Buckham ◽  
Edward J. Park
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Vibration Suppression ◽  
Piezoelectric Actuators ◽  
Element Model ◽  
Flexible Beam ◽  
Lumped Mass ◽  
Time Step ◽  
Loop Control ◽  
Weighted Residuals

In this paper a new finite element model (FEM) is introduced for the analysis of a highly flexible beam undergoing large deformations due to fast slewing. The finite element model uses a novel absolute nodal coordinate formulation (ANCF) that employs a third order twisted cubic spline geometry. Galerkin’s method of weighted residuals is applied to discretize equations of motion derived for the beam continuum. The model exploits a synergy between the twisted spline geometry and the lumped mass approximation to halve the size of the matrix equations that must be solved on each time step. In the simulation of fast slewing maneuvers, a very slender beam is considered and the elastic deformations experienced are an order of magnitude larger than cases considered to date. Closed-loop control simulation results, using PD feedback for both hub and piezoelectric actuator control, show that the proposed schemes are effective in suppressing very large vibrations. These results show the potential of the proposed FEM as an effective design and simulation tool for analyzing a highly flexible beam undergoing fast slewing, and for synthesizing vibration controllers for piezoelectric actuators.

scholarly journals Numerical and Experimental Study on Integration of Control Actions into the Finite Element Solutions in Smart Structures

2009 ◽  
Vol 16 (4) ◽  
pp. 401-415 ◽  
Author(s):  
L. Malgaca ◽  
H. Karagülle
Keyword(s):  
Finite Element ◽  
Vibration Control ◽  
Lead Zirconate Titanate ◽  
Smart Structures ◽  
Harmonic Excitation ◽  
Smart Structure ◽  
Displacement Sensor ◽  
Control Actions ◽  
First Case ◽  
Simulation Results

Piezoelectric smart structures can be modeled using commercial finite element packages. Integration of control actions into the finite element model solutions (ICFES) can be done in ANSYS by using parametric design language. Simulation results can be obtained easily in smart structures by this method. In this work, cantilever smart structures consisting of aluminum beams and lead-zirconate-titanate (PZT) patches are considered. Two cases are studied numerically and experimentally in parallel. In the first case, a smart structure with a single PZT patch is used for the free vibration control under an initial tip displacement. In the second case, a smart structure with two PZT patches is used for the forced vibration control under harmonic excitation, where one of the PZT patches is used as vibration generating shaker while the other is used as vibration controlling actuator. For the two cases, modal analyses are done using chirp signals; Control OFF and Control ON responses in the time domain are obtained for various controller gains. A non-contact laser displacement sensor and strain gauges are utilized for the feedback signals. It is observed that all the simulation results agree with the experimental results.

Three Simple and Efficient Methods for Vibration Control of Slewing Flexible Structures

1993 ◽  
Vol 115 (4) ◽  
pp. 725-730 ◽  
Author(s):  
Y. C. Liu ◽  
S. M. Yang
Keyword(s):  
Vibration Control ◽  
Vibration Suppression ◽  
Flexible Structures ◽  
Terminal State ◽  
Active Damping ◽  
Torque Control ◽  
Control Voltage ◽  
Constrained Motion ◽  
Damping Control ◽  
Motion Method

Three simple and efficient methods are presented for the vibration control of slewing flexible structures. These methods are developed based on the constrained motion method in which the rotational maneuver is formulated as prescribed trajectory constraint. The constrained motion method in two stage, CMM-TS, accomplishes the first stage rigid-body slewing motion and minimizes the flexible body vibration at terminal state by an optimal control law. The constrained motion method with active damping, CMM-AD, employs piezoelectric actuator with velocity feedback for active damping control. The required slewing time and settling time is governed by the control torque and control voltage, respectively. The third method, CMM-CO, combines the active damping and optimal torque control for vibration suppression during and after the slewing motion. All methods are shown to be efficient in computation, concise in formulation, and effective in hardware realizable application.

scholarly journals Simulating Displacement and Velocity Signals by Piezoelectric Sensor in Vibration Control Applications

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
G. J. Sheu ◽  
S. M. Yang ◽  
W. L. Huang
Keyword(s):  
Vibration Control ◽  
Vibration Suppression ◽  
Piezoelectric Sensor ◽  
Smart Structure ◽  
Velocity Signal ◽  
Active Mass ◽  
Mass Damper ◽  
Active Mass Damper ◽  
Physical Geometry ◽  
Neural Sensor

Intelligent structures with built-in piezoelectric sensor and actuator that can actively change their physical geometry and/or properties have been known preferable in vibration control. However, it is often arguable to determine if measurement of piezoelectric sensor is strain rate, displacement, or velocity signal. This paper presents a neural sensor design to simulate the sensor dynamics. An artificial neural network with error backpropagation algorithm is developed such that the embedded and attached piezoelectric sensor can faithfully measure the displacement and velocity without any signal conditioning circuitry. Experimental verification shows that the neural sensor is effective to vibration suppression of a smart structure by embedded sensor/actuator and a building structure by surface-attached piezoelectric sensor and active mass damper.

Vibration Control of Smart Structures by Using Neural Networks

1997 ◽  
Vol 119 (1) ◽  
pp. 34-39 ◽  
Author(s):  
S. M. Yang ◽  
G. S. Lee
Keyword(s):  
Neural Networks ◽  
System Identification ◽  
Vibration Control ◽  
Vibration Suppression ◽  
Piezoelectric Sensor ◽  
Smart Structure ◽  
The Third ◽  
Parameter Variations ◽  
Physical Geometry ◽  
On Line

Smart structure with build-in sensor(s) and actuator(s) that can actively and adoptively change its physical geometry and properties has been considered one of the best candidates in vibration control applications. Implementation of neural networks to system identification and vibration suppression of a smart structure is conducted in this paper. Three neural networks are developed, one for system identification, the second for on-line state estimation, and the third for vibration suppression. It is shown both in analysis and in experiment that these neural networks can identify, estimate, and suppress the vibration of a composite structure by the embedded piezoelectric sensor and actuator. The controller is also shown to be robust to system parameter variations.

scholarly journals Vibration Control of an Aero Pipeline System with Active Constraint Layer Damping Treatment

2019 ◽  
Vol 9 (10) ◽  
pp. 2094 ◽  
Author(s):  
Jingyu Zhai ◽  
Jiwu Li ◽  
Daitong Wei ◽  
Peixin Gao ◽  
Yangyang Yan ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Vibration Control ◽  
Element Model ◽  
Control Voltage ◽  
Pipeline System ◽  
Constrained Layer Damping ◽  
Active Constraint ◽  
Active Constrained Layer Damping ◽  
Active Constrained Layer

In this paper, vibration control of an aero pipeline system using active constrained layer damping treatment has been investigated in terms of the vibration and stress distribution. A three-dimensional finite element model of such a pipeline with active constrained layer damping (ACLD) patches is developed. The transfer of the driving force under harmonic voltage is analyzed based on the finite element model. The vibration control of the pipeline with active constrained layer damping treatment under different voltages is computed to analyze the influence of control parameters and structural parameters on the control effect. An experiment platform is developed to validate the above relations. Results show that the performance of the active constrained layer damping treatment is affected by the elastic modulus and thickness of the viscoelastic layer, control voltage and structure size. The performance increases significantly with the rising of the control voltage and cover area of ACLD patches among these parameters.

MIMO-FEA for Design and Active Vibration Suppression of an Adaptive Circular Composite Plate

Aerospace ◽  
2006 ◽  
Author(s):  
Mehrdad N. Ghasemi-Nejhad ◽  
Randy Sakagawa
Keyword(s):  
Finite Element ◽  
Composite Plate ◽  
Vibration Suppression ◽  
Complex Geometry ◽  
Fiber Composite ◽  
External Disturbance ◽  
Control Voltage ◽  
Space Applications ◽  
Active Vibration Suppression ◽  
Active Vibration

Adaptive structures combine sensors, actuators, and control systems for intelligent responses to their environment and promise a novel approach to satisfying the stringent performance requirements of future aerospace and space applications. This study focuses on a multi-input-multi-output finite element analysis for the design and active vibration suppression of an adaptive circular composite plate used here as the top device-plate for an intelligent composite platform that is designed for thrust vector control of a satellite thruster. The adaptive circular composite plate has three pairs of back-to-back embedded piezoelectric active fiber composite actuator patches. A finite element harmonic analysis is employed to develop a vibration suppression scheme, which is then used to study the vibration suppression of the circular composite plate using the piezoelectric patches embedded in the plate. In this approach, the responses of the structure to an arbitrary external force as well as an arbitrary internal piezoelectric control voltage are first determined, individually. Using the linearity of the system, the responses are then assembled in a system of equation as a coupled system and then solved simultaneously to determine the control voltages and their respective phases for the system actuators for a given external disturbance. This approach is an effective technique for the design of smart structures with complex geometry and multi-input-multi-output sensor and actuator systems to study their active vibration suppression capabilities and effectiveness. The design and active vibration suppression of the adaptive circular composite plate are explained and discussed.

scholarly journals Influence of Hysteresis on the Vibration Control of a Smart Beam with a Piezoelectric Actuator by the Bouc–Wen Model

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Ting Zhang
Keyword(s):  
Control System ◽  
Vibration Control ◽  
Vibration Suppression ◽  
Numerical Range ◽  
Reference Model ◽  
Smart Structure ◽  
Hysteresis Model ◽  
Control Effect ◽  
Smart Beam ◽  
The Stability

The hysteresis property in a smart structure has attracted much attention from researchers for several decades. Hysteresis not only affects the response precision of the smart structure but also threatens the stability of the system. This paper focuses on how the hysteresis property influences the control effect of vibration suppression for a smart beam. Furthermore, the Bouc–Wen model is adopted to describe the hysteresis property of a smart beam and the hysteresis parameters of the hysteresis model are identified with a genetic algorithm. Based on the identification results, the hysteresis model is validated to represent the hysteresis property of the smart beam. Based on the hysteresis model, model reference adaptive control is designed to explore the influence of hysteresis on the vibration control of the smart beam. With some simulations and experiments, it is found that the vibration control effect is influenced when the hysteresis item changes. The vibration control effect will be improved when the hysteresis coefficient in the Bouc–Wen model, as the expected objective model of the adaptive reference model, is within a proper numerical range where the control system is stable. Furthermore, when the time delay is considered in the closed-loop control system, the principle of the hysteresis influence is different. The results indicate that the hysteresis property affects not only the control effect but also the stability of the control system for a smart cantilever beam.

scholarly journals Vibration Control and Dynamical Model of a Thermal-Electrical-Mechanical Coupled Smart Cantilevered Beam

2011 ◽  
Vol 2-3 ◽  
pp. 535-540 ◽  
Author(s):  
Ting Zhang ◽  
H.G. Li ◽  
J.J. Zhao
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Vibration Control ◽  
Harmonic Analysis ◽  
Position Control ◽  
Vibration Suppression ◽  
Thermal Environment ◽  
Element Model ◽  
Pole Placement ◽  
Thermal Influence

Piezoelectric actuators used in vibration control and high precision control have been known widely in recent years. Especially in aeronautics and MEMS systems, their use is spread from vibration suppression to position control. In this paper, a finite element model (FEM) of a piezoelectric actuator and cantilever in thermal environment is presented to suppress vibration effectively. In other words, the finite element model is namely thermal-electrical-mechanical coupled FEM. Based on a 8-node plane finite element, the modal analysis, the harmonic analysis and the transient analysis have been obtained in the current work. Therefore a transfer function model will be attained through the harmonic analysis by identification method in order to control vibration by control law. In addition, the controller will be designed with the adaptive pole placement control (APPC). Finally, through simulation, the thermal influence is considerable for natural frequencies, harmonic response and free vibration. Moreover, the APPC is a significant plan to vibration control in the paper.

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