Analytical analysis of a beam flexural-mode piezoelectric actuator for deformable mirrors

Wang, Hairen

doi:10.1117/1.jatis.1.4.049001

Cited by 11 publications

(17 citation statements)

References 18 publications

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“…These rods are equipped with piezoelectric stack transducers APA100M from Cedrat Technologies (similar to flexuralmode piezoelectric actuators). 22 The stack is further divided into two parts. One stack is used as an actuator while the other is used as a force sensor.…”

Section: Talc Conceptmentioning

confidence: 99%

Dynamic stabilization of thin aperture light collector space telescope using active rods

Verma

Pece

Hellegouarch

et al. 2020

J. Astron. Telesc. Instrum. Syst.

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Thin aperture light collector (TALC) is the next generation of telescopes for space exploration. TALC consists of deployable annular segmented mirrors supported on a central mast with the help of cables. The dynamic stability of the telescope is of immense importance in order to make sure that the telescope is pointing in the right direction during the observation period. We present a control strategy for the dynamic stabilization of the segmented TALC structure using active rods. The active rods consist of collocated pairs of piezoelectric stack actuators and sensors. Decentralized integral force feedback is proposed to enhance the dynamic stability of the TALC. The effectiveness of the strategy is demonstrated on a 1/10th scaled mock-up model of the TALC. For numerical investigation, finite element analysis of the TALC is carried out and a reduced order model is extracted using the Craig-Bampton method. This reduced order model is then used for the design and numerical validation of the controller. Experiments are conducted on the mock-up model of the TALC to evaluate the performance of the proposed strategy. It is found that the proposed strategy is quite effective for dynamic stabilization of TALC. It is found to reduce both steady state and transient responses of the TALC.

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Section: Talc Conceptmentioning

confidence: 99%

Dynamic stabilization of thin aperture light collector space telescope using active rods

Verma

Pece

Hellegouarch

et al. 2020

J. Astron. Telesc. Instrum. Syst.

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show abstract

“…The z direction is normal to the layers' surface, and the r direction and the θ direction are the radial direction and the circumferential direction, respectively. Here, ðr; θ; zÞ corresponds to (1,2,3). According to the electrode configurations, the electric field in the actuator has the following components:…”

Section: (A)]mentioning

confidence: 99%

“…The bandwidth of the adaptive optics system is mainly limited by the resonance frequency of the deformable mirror. 3 Recently, the adaptive optics telescopes have become larger and larger, and much more expensive, such as TMT 4 and LOT. 5 These adaptive optics telescopes require a deformable mirror with large stroke, high resonance frequency but low cost.…”

Section: Introductionmentioning

confidence: 99%

“…The piezoelectric bimorph-beam-bending actuator and the circular flexural-mode piezoelectric actuator (CFPA), of different bimorph piezoelectric compound structures, have been analyzed in our previous works, and the results show that the bending actuators have larger strokes, higher resonance frequencies, and lower cost owing to the simplicity of the structure. 3,[10][11][12] In our previous work, 2 the piezoelectric bimorph-beam-bending actuator was applied in a discrete-layout bimorph piezoelectric deformable mirror (DBPDM). Compared with the two kinds of conventional deformable mirrors mentioned above, the stroke of the DBPDM is larger than that of CDPDM and CBPDM; the resonant frequency of the DBPDM is higher than that of CBPDM and almost equal to that of CDPDM.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of a discrete-layout bimorph disk elements piezoelectric deformable mirror

Wang

Chen

Yang

et al. 2018

J. Astron. Telesc. Instrum. Syst.

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We introduce a discrete-layout bimorph disk elements piezoelectric deformable mirror (DBDEPDM), driven by the circular flexural-mode piezoelectric actuators. We formulated an electromechanical model for analyzing the performance of the new deformable mirror. As a numerical example, a 21-actuators DBDEPDM with an aperture of 165 mm was modeled. The presented results demonstrate that the DBDEPDM has a stroke larger than 10 μm and the resonance frequency is 4.456 kHz. Compared with the conventional piezoelectric deformable mirrors, the DBDEPDM has a larger stroke, higher resonance frequency, and provides higher spatial resolution due to the circular shape of its actuators. Moreover, numerical simulations of influence functions on the model are provided.

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“…In the last 30 years, the piezoelectric actuators, which have a high accuracy and fast response due to their strong electromechanical coupling, have been widely applied to many engineering areas (Crawley and De Luis, 1987; Freeman and Garcia, 1982; Hom, 1999; Hom et al, 1999; Kamada et al, 1997; Marth, 2004; Richter, 2009; Yu and Wang, 2016; Zhu et al, 2015). In our previous works (Wang, 2015), a beam piezoelectric bending actuator (BPBA) has been proposed. Some comparative studies of the BPBA for different metallic layers have already been presented in the previous works.…”

Section: Introductionmentioning

confidence: 99%

Linear and nonlinear analysis of the thermal effects of beam piezoelectric bending actuator on adaptive optics

Wang

Hu²

2017

Journal of Intelligent Material Systems and Structures

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The beam piezoelectric bending actuator, of a simple structure and at a low cost, can be a good match for the large adaptive optics telescopes, for it has a large stroke and a high resonance frequency. In this article, the thermal effects of a beam piezoelectric bending actuator are analyzed in the aspects of the statics, dynamics, and nonlinear dynamics. The results of the linear statics and dynamics have shown that the thermal effects will produce the zero offsets to the static strokes of the beam piezoelectric bending actuator and have little influence on the resonant frequency. Besides, finite element analysis methods are applied to validate the analytic methods. The conclusions have shown that the analytic results and the finite element analysis results are reasonably consistent with each other. Furthermore, the nonlinear behaviors of the beam piezoelectric bending actuator in dynamics are studied, and through the changeable curves of the frequency, it can be observed that the results of the strokes imposed on the actuator have exhibited multiple values and jumps near the resonance.

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Analytical analysis of a beam flexural-mode piezoelectric actuator for deformable mirrors

Cited by 11 publications

References 18 publications

Dynamic stabilization of thin aperture light collector space telescope using active rods

Dynamic stabilization of thin aperture light collector space telescope using active rods

Analysis of a discrete-layout bimorph disk elements piezoelectric deformable mirror

Linear and nonlinear analysis of the thermal effects of beam piezoelectric bending actuator on adaptive optics

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