Experiments on active precision isolation with a smart conical adapter

Li, H.; Chen, Z.B.; Tzou, H. S.

doi:10.1016/j.jsv.2016.03.039

Cited by 12 publications

(5 citation statements)

References 27 publications

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“…The payload attach fitting is limited by the constrained viscoelastic layer on the outer surface, thus its damping is enhanced obviously. Li et al (2016) designed and tested an active vibration isolator, which includes flexible piezoelectric sensors and actuators. The thin shell hypothesis and the converse piezoelectric effect are considered to obtain the modal control force during the design of the isolator.…”

Section: Multi-dimensional Vibration Mitigation/isolation Devices Appmentioning

confidence: 99%

Recent Advances in Multi-Dimensional Vibration Mitigation Materials and Devices

Chen

Zhou

et al. 2019

Front. Mater.

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Harmful vibrations can cause many engineering problems, such as disasters of civil engineering structures, failure of precision equipment, and the disruption of some spacecraft components. In most situations, the vibrations are usually three-dimensional excitations. Therefore, research on multi-dimensional vibration control has become a worldwide hotspot in engineering. This article presents a comprehensive assessment of recent developments of multi-dimensional vibration mitigation devices and the material applied in such devices. The vibration mitigation materials mainly include the passive vibration mitigation materials and smart vibration mitigation materials. Subsequently, the vibration mitigation devices in civil engineering, mechanical engineering, and aerospace engineering are reviewed and commented, respectively. Above all, the multi-dimensional vibration mitigation devices and materials are found to be effective for reducing multi-dimensional vibrations. However, enhancing the mitigation performance of the devices in each direction, including improving the mitigation capability of materials, is still a challenging issue.

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Section: Multi-dimensional Vibration Mitigation/isolation Devices Appmentioning

confidence: 99%

Recent Advances in Multi-Dimensional Vibration Mitigation Materials and Devices

Chen

Zhou

et al. 2019

Front. Mater.

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“…So, they are more suitable than PVDFs for using as the actuators in the vibration control of the shell structure. So far, MFCs had been used as actuators in various shell structures [8,[21][22][23]. In MFCs, the piezoelectric constant d 33 is usually taken as 400 pC/N.…”

Section: Introductionmentioning

confidence: 99%

“…In MFCs, the piezoelectric constant d 33 is usually taken as 400 pC/N. However, that will lead to a large error [22]. This is because d 33 is the strain constant of piezoelectric ceramic fiber along the length direction, and it cannot be considered as the whole strain constant of MFC [24].…”

Section: Introductionmentioning

confidence: 99%

Multi-mode Vibration Averagely Control for Cylindrical Shells by Optimally Distributed Piezoelectric Sensors and Actuators

Guo

et al. 2022

J. Vib. Eng. Technol.

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Purpose Multi-modal vibration control often causes modal peaks' reductions unevenly, which makes the active vibration suppression system less effective to the broadband disturbance. To this end, a multi-mode vibration average suppression method for cylindrical shells with optimally distributed piezoelectric sensors and actuators (S/As) is proposed in this paper. Methods Based on the equivalent homogenized parameters of the macro-fiber composite (MFC), the modal control force of MFC with a tilt angle is derived. Its form is similar to that of the modal sensing signal with a tilt angle. A modified S/As placement optimization criterion of maximum observability and controllability for average distribution of the control efficiencies of multi-mode is also proposed. Thus, an optimization model of considering the positions and orientations of orthotropic piezoelectric S/As for the cylindrical shell multi-mode vibration control is established. Result The proposed method is applied to optimize the S/As distribution of a cantilever cylindrical shell. The results of optimization placement show that the S/As are placed near the free ends, their tilt angles tend to π/2 rad. To valid the effectiveness of optimized S/As distribution, a linear quadratic Gaussian (LQG) controller with Kalman filter is applied to control the response of cylindrical shell under the harmonic and transient excitations. Conclusion The vibration control system with S/As distribution optimized by the modified criterion could suppress all the response peaks more averagely than that under the original criterion, and achieve better vibration control performance. In addition, including the tilt angle in the optimization problem, the efficiency and the uniformity of the multi-mode vibration suppression system could be improved.

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“…The finite element method is widely adopted to build a vibration isolation system model for more complex infrastructure forms [14]. Experimental research occupies an important part in the research and design of vibration isolators [15][16][17][18][19]. There are many evaluation methods for the vibration effectiveness of elastic foundation isolation system, which include power flow transfer spectrum [20], the maximum and minimum singular values of the effective ratio matrix of force and velocity [21], the transfer rate matrix of force and velocity [22] and the force transmission rate [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Verification of Vibration Isolation Effectiveness of the Underwater Vehicle Power Plant

Yang

Pan

Yin

et al. 2021

JMSE

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In order to enhance the vibration isolation effectiveness of an underwater vehicle power plant, and alleviate the mechanical vibration of the outer housing, initially discrete vibration isolators were improved, and three new types of ring vibration isolators designed, i.e., ring metal rubber isolators, magnesium alloy isolators and modified ultra-high polyethylene isolators (MUHP). A vibrator excitation test was carried out, and the isolation effectiveness of the three types of vibration isolators was evaluated, adopting insertion loss and vibration energy level drop. The results showed that compared with the initial isolators and the other two new types of isolators, MUHP showed the most significant vibration isolation effectiveness. Furthermore, its effectiveness was verified by a power vibration test of the power plant. To improve the vibration isolation effectiveness, in addition to vibration isolators, it is essential to carry out investigations on high-impedance housings.

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Experiments on active precision isolation with a smart conical adapter

Cited by 12 publications

References 27 publications

Recent Advances in Multi-Dimensional Vibration Mitigation Materials and Devices

Recent Advances in Multi-Dimensional Vibration Mitigation Materials and Devices

Multi-mode Vibration Averagely Control for Cylindrical Shells by Optimally Distributed Piezoelectric Sensors and Actuators

Verification of Vibration Isolation Effectiveness of the Underwater Vehicle Power Plant

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