&lt;title&gt;Adaptronics applications in satellite mirrors&lt;/title&gt;

Duerr, Johannes K.; Herold-Schmidt, Ursula; Scheulen, Dietmar; Sippel, Rudolf; Zaglauer, Helmut W.

doi:10.1117/12.388165

Cited by 2 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With respect to error correction, quasi-static control is sufficient since all types of loading such as compensation for gravitational or temperature loads and forces at bearings occur either quasi-statically or as slow transients. As shown in a previous study [34,35] all requirements can only be met at once by active or adaptive systems.…”

Section: General Requirementsmentioning

confidence: 87%

“…The design of optical mirrors made from carbon fibre reinforced ceramics (C/SiC) differs significantly from a CFRP design, particularly due to processing of the material [34,35].…”

Section: Mirror Made Of Fibre-reinforced Ceramicsmentioning

confidence: 99%

“…Based on the experience gained from this research effort the development of a laboratory demonstrator optical mirror was started at DaimlerChrysler Research and Technology Dornier in 1998 [33] in order to be able to meet the tough requirements of optical satellite mirrors to be flown on future space missions as described above. Development and numerical evaluation of two different concepts employing structurally integrated piezoceramic actuators was carried out [34,35]. Based on the results a mirror made of CFRP was selected for mirror realization.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development and manufacture of an adaptive lightweight mirror for space application

Dürr

Honke

Alberti³

et al. 2003

Smart Mater. Struct.

Self Cite

View full text Add to dashboard Cite

Currently, scientific space missions based on interferometric optical and infrared astronomical instruments are under development in the United States as well as in Europe. These instruments require optical path length accuracy in the order of a few nanometres across structural dimensions of several metres. This puts extreme demands on static and dynamic structural stability. It is expected that actively controlled, adaptive structures will increasingly have to be used for these satellite applications to overcome the limits of passive structural accuracy. Based on the evaluation of different piezo-active concepts, analysis and design of an adaptive lightweight satellite mirror primarily made of carbon fibre reinforced plastic with embedded piezoceramic actuators for shape control is described. Simulation of global mirror performance takes different wavefront sensors and controls for several cases of loading into account. Extensive finite-element optimization of various structural details was performed while testing of active sub-components served as a basis for a final update of finite-element models. Local material properties of sub-assemblies or geometry effects at the edges of the structure were investigated with respect to their impact on mirror performance. The major result of the analysis was the lay-out of the adaptive mirror and the specific design of embedded piezoceramic actuators. Manufacture of structural components and successfully completed mirror integration is described. The paper concludes with an outline of testing, and space qualification of the demonstrator of an actively controllable lightweight satellite mirror currently under way.

show abstract

Section: General Requirementsmentioning

confidence: 87%

“…The design of optical mirrors made from carbon fibre reinforced ceramics (C/SiC) differs significantly from a CFRP design, particularly due to processing of the material [34,35].…”

Section: Mirror Made Of Fibre-reinforced Ceramicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development and manufacture of an adaptive lightweight mirror for space application

Dürr

Honke

Alberti³

et al. 2003

Smart Mater. Struct.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Possible applications encompass fields such as structural health monitoring of aircraft [38] and ships [39], deformable elements for flight control surfaces [40], deformable mirror and antennae surfaces on spacecraft [41], strain sensing for roads and bridges [42], machinery vibration control systems [43], and biomedical applications including micropumps [44] and targeted drug delivery [45]. …”

Section: Discussionmentioning

confidence: 99%

“…Even though carbon nanostructure/TEM composites only allow for one-time expansion/actuation, the innovative combination of filler materials in an elastomer matrix and resulting binary set of material properties presents a plethora of research and industrial applications. Possible applications encompass fields such as structural health monitoring of aircraft [38] and ships [39], deformable elements for flight control surfaces [40], deformable mirror and antennae surfaces on spacecraft [41], strain sensing for roads and bridges [42], machinery vibration control systems [43], and biomedical applications including micropumps [44] and targeted drug delivery [45]. Elastic to plastic-like transformation allows for incorporation of sensing and actuation into a single coherent functional material thereby minimizing complexity and maximizing reliability.…”

Section: Discussionmentioning

confidence: 99%

Stimuli-responsive transformation in carbon nanotube/expanding microsphere–polymer composites

Loomis¹,

Xu²,

Panchapakesan³

2013

Nanotechnology

View full text Add to dashboard Cite

Our work introduces a class of stimuli-responsive expanding polymer composites with ability to unidirectionally transform physical dimensions, elastic modulus, density, and electrical resistance. Carbon nanotubes and core-shell acrylic microspheres were dispersed in polydimethylsiloxane, resulting in composites that exhibit a binary set of material properties. Upon thermal or infrared stimuli, liquid cores encapsulated within the microspheres vaporize, expanding the surrounding shells and stretching the matrix. Microsphere expansion results in visible dimensional changes, regions of reduced polymeric chain mobility, nanotube tensioning, and overall elastic to plastic-like transformation of the composite. Here we show composite transformations including macroscopic volume expansion (>500%), density reduction (>80%), and elastic modulus increase (>675%). Additionally, conductive nanotubes allow for remote expansion monitoring and exhibit distinct loading-dependent electrical responses. With ability to pattern regions of tailorable expansion, strength, and electrical resistance into a single polymer skin, these composites present opportunities as structural and electrical building blocks in smart systems.

show abstract

<title>Adaptronics applications in satellite mirrors</title>

Cited by 2 publications

References 0 publications

Development and manufacture of an adaptive lightweight mirror for space application

Development and manufacture of an adaptive lightweight mirror for space application

Stimuli-responsive transformation in carbon nanotube/expanding microsphere–polymer composites

Contact Info

Product

Resources

About