1987
DOI: 10.2514/3.9715
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Control of flexible structures by applied thermal gradients

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Cited by 48 publications
(22 citation statements)
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“…As detailed in [3], the characteristic curved shape of THUNDER actuators is due primarily to differing thermal coefficients in the constituent materials, which produce thermal stresses in the combined actuator during cooling, and secondarily to the reorientation of dipoles during repoling. We note that the quantification of strains due to ' thermal gradients has been investigated for a variety of applications (e.g., see [2,4,5,6]) with certain aspects having been considered for THUNDER actuators [3,7]. The quantification of stresses and strains due to repoling is based on domain theory for general ferroelectric materials [8,9,12,13].…”
Section: The Nasa Sti Program Office In Profilementioning
confidence: 99%
“…As detailed in [3], the characteristic curved shape of THUNDER actuators is due primarily to differing thermal coefficients in the constituent materials, which produce thermal stresses in the combined actuator during cooling, and secondarily to the reorientation of dipoles during repoling. We note that the quantification of strains due to ' thermal gradients has been investigated for a variety of applications (e.g., see [2,4,5,6]) with certain aspects having been considered for THUNDER actuators [3,7]. The quantification of stresses and strains due to repoling is based on domain theory for general ferroelectric materials [8,9,12,13].…”
Section: The Nasa Sti Program Office In Profilementioning
confidence: 99%
“…The drawbacks of this method are its inability to do pointing maneuvers and the very small strains provided by the piezoelectric forces. Another relatively new method of active damping is applying thermal gradients to the structure to enhance the structures own internal damping capabilities (17). This method also has the drawback of not being able to point the structure through large motions, but it does show promise of being effective in damping vibrations.…”
Section: Literature Reviewmentioning
confidence: 99%
“…Therefore, to achieve the designed shape, the nodal positions need to be adjusted after the structural members are assembled together. The adjustment of the nodal positions is usually realized by altering the length of the structural components [1].…”
Section: Introductionmentioning
confidence: 99%