Active vibration control of a space truss using a lead zirconate titanate stack actuator

Song, Gangbing; Vlattas, John; Johnson, Scott E.; Agrawal, Brij N.

doi:10.1243/0954410011533356

Cited by 27 publications

(18 citation statements)

References 11 publications

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“…Next, piezoelectric flat patches for both PZT-5A and PZT-5H with various geometries are considered. In Equation (6), U is the actual voltage to be applied to the piezoelectric flat patch actuator (as shown in Figure 2), n is the number of wafers used within the flat patch actuator, and U Â n is the amount of the voltage that should be used in ANSYS FEA to obtain the same effect of U on the actual piezo flat patch. The reason for this modeling is that in reality the piezo wafers are stacked in series mechanically but in parallel electrically.…”

Section: Piezoelectric Verification Resultsmentioning

confidence: 99%

Finite Element Method for Active Vibration Suppression of Smart Composite Structures using Piezoelectric Materials

Ghasemi‐Nejhad

Pourjalali²,

Uyema³

et al. 2006

Journal of Thermoplastic Composite Materials

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Adaptive or intelligent structures which have the capability for sensing and responding to their environment promise a novel approach to satisfy the stringent performance requirements of future space missions. Analytical, numerical, and experimental results are employed to verify the performance of piezoelectric stacks and patches as well as to determine the natural frequencies of typical strut and panel structures. A strut model with a piezoelectric stack actuator for axial vibration suppression and a composite beam with surface-mounted piezoelectric patch actuator for lateral vibration suppression are considered to model an active composite strut (ACS) and an active composite panel (ACP), respectively. These ACS and ACP are employed to develop an actuator optimum voltage (OV) for active vibration suppression using modal, harmonic, and transient finite element analyses for a range of frequency encompassing a natural frequency. The ACP model demonstrates that the actuator vibration suppression capability depends on the modal shape and location of the actuator. The OV, in this work, is determined by increasing the level of actuator voltage gradually and generating a vibration with same frequencies as the external vibration but 180 out-of-phase, and observing the increasing level of active vibration suppression until an optimum/threshold actuator voltage is reached. agreements. This work also presents a systematic guideline for the use of piezoelectric stack and monolithic patch smart materials in intelligent structures using the finite element method.KEY WORDS: active vibration suppression, smart composite structures, piezoelectric stacks and patches, finite element analysis, actuator optimum voltage, active composite struts and panels, axial and lateral vibration, actuator location effects.

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Section: Piezoelectric Verification Resultsmentioning

confidence: 99%

Finite Element Method for Active Vibration Suppression of Smart Composite Structures using Piezoelectric Materials

Ghasemi‐Nejhad

Pourjalali²,

Uyema³

et al. 2006

Journal of Thermoplastic Composite Materials

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“…Truss structures are popularly used in various engineering fields [1][2][3][4], and among them, steel tubular trusses have been widely applied in large engineering structures, such as stadiums, bridges, concert halls, and offshore platforms, because of their architecturally attractive shapes and favorable structural properties [5]. Many investigations have been carried out related to steel tubular truss structures [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Static Behavior of Reinforced Warren Circular Hollow Section (CHS) Tubular Trusses

et al. 2018

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For truss structures, the question of whether to weld hidden welds or not has been controversial. In the actual construction process of truss structures, the members are usually spot welded in place on the assembly platform, and then welded as a whole, while the hidden welds of the truss are not welded, especially for small pipe diameter trusses. Furthermore, in this study, under hidden weld unwelded conditions, two kinds of reinforcing method (adding a half outer sleeve on each joint and filling concrete into the chord members) are adopted to achieve the purpose of strengthening the truss. Therefore, this paper presents an experimental study on the static behavior of four types of Warren tubular trusses made of CHS members. These four types are (1) T-HW: The truss with hidden welds welded; (2) T-HN: The truss with hidden welds unwelded; (3) TS-AS: The truss strengthened on the basis of T-HN by adding a half outer sleeve on each joint; (4) TS-FC: The truss strengthened on the basis of T-HN by filling concrete into the top and bottom chord members. The mechanical behavior, failure mode, bearing capacity, and load-displacement of all specimens were investigated. The surface plasticity of the bottom chord member, the weld fracture around tubular joints at the bottom chord member, and the bending deformation of the bottom chord member were observed in the tests. Compared with the T-HW specimen, the load carrying capacity of the T-HN specimen decreased by 18%. On the other hand, the T-HN specimen has better deformability than the T-HW specimen. The reinforcing method of adding a half outer sleeve on each joint and filling concrete into the chord members can effectively improve the load carrying capacity and stiffness of the truss, thus reducing the overall deformation of the truss, but the reinforcing method of filling concrete into the chord members is more efficient. of 22trusses under static loading. The failure modes, load carrying capacity, overall deflection, and strain intensity of all test specimens were discussed. Finite element analysis (FEA) software was used for numerical modelling of Warren CHS tubular trusses and the results obtained by numerical analysis were compared with those of the experimental results. Experimental Study Test SpecimensA total of four types of Warren CHS tubular trusses, including the truss with hidden welding welded (T-HW), the truss with hidden welding unwelded (T-HN), the truss strengthened on the basis of T-HN by adding a half outer sleeve on each joint (TS-AS), and the truss strengthened on the basis of T-HN by filling concrete in top and bottom chord members (TS-FC), were designed according to the design guidelines given in the Chinese Standard for Design of Steel Structures (GB50017-2017) [13]. The truss configuration of all specimens is Warren truss with symmetric geometry, loading application, and boundary conditions.The nominal dimensions of CHS members, including chord members, brace members, and lateral bracings of all types of multiplanar tubular trusses, are identical ...

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“…Furthermore than using piezoelectric, there are other kinds of active control algorithms. For example, Song and his coworkers presented the active control mechanism for space truss, using a Lead zirconate Titanate stack actuator [15]. The common active control algorithms have been listed in Table 1, followed by the main idea used in each method [16].…”

Section: Introductionmentioning

confidence: 99%

New Active Control Method Based on Using Multiactuators and Sensors Considering Uncertainty of Parameters

Karimpour

Keyhani

Alamatian

2014

Advances in Civil Engineering

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New approach is presented for controlling the structural vibrations. The proposed active control method is based on structural dynamics theories in which multiactuators and sensors are utilized. Each actuator force is modeled as an equivalent viscous damper so that several lower vibration modes are damped critically. This subject is achieved by simple mathematical formulation. The proposed method does not depend on the type of dynamic load and it could be applied to control structures with multidegrees of freedom. For numerical verification of proposed method, several criterions such as maximum displacement, maximum kinetic energy, maximum drift, and time history of controlled force and displacement are evaluated in two- , five- , and seven-story shear buildings, subjected to the harmonic load, impact force, and the Elcentro base excitation. This study shows that the proposed method has suitable efficiency for reducing structural vibrations. Moreover, the uncertainty effect of different parameters is investigated here.

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Active vibration control of a space truss using a lead zirconate titanate stack actuator

Cited by 27 publications

References 11 publications

Finite Element Method for Active Vibration Suppression of Smart Composite Structures using Piezoelectric Materials

Finite Element Method for Active Vibration Suppression of Smart Composite Structures using Piezoelectric Materials

Experimental Study on the Static Behavior of Reinforced Warren Circular Hollow Section (CHS) Tubular Trusses

New Active Control Method Based on Using Multiactuators and Sensors Considering Uncertainty of Parameters

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