Inflatable shape changing colonies assembling versatile smart space structures

Various plants have the ability to follow the sun with their flowers or leaves during the course of a day via a mechanism known as heliotropism. This mechanism is characterised by the introduction of pressure gradients between neighbouring motor cells in the plant׳s stem, enabling the stem to bend. By adapting this bio-inspired mechanism to mechanical systems, a new class of smart structures can be created. The developed overall structure is made up of a number of cellular colonies, each consisting of a central pressure source surrounded by multiple cells. After launch, the cellular arrays are deployed in space and are either preassembled or alternatively are attached together during their release or afterwards. A central pressure source is provided by a high-pressure storage unit with an integrated valve, which provides ingress gas flow to the system; the gas is then routed through the system via a sequence of valve operations and cellular actuations, allowing for any desired shape to be achieved within the constraints of the deployed array geometry. This smart structure consists of a three dimensional adaptable cellular array with fluid controlling Micro Electromechanical Systems (MEMS) components enabling the structure to change its global shape. The proposed MEMS components include microvalves, pressure sensors, mechanical interconnect structures, and electrical routing. This paper will also give an overview of the system architecture and shows the feasibility and shape changing capabilities of the proposed design with multibody dynamic simulations. Example applications of this lightweight shape changing structure include concentrators, mirrors, and communications antennas that are able to dynamically change their focal point, as well as substructures for solar sails that are capable of steering through solar winds by altering the sails׳ subjected area.

[1]  Bonnie L. Gray,et al.  Enclosed SU-8 and PDMS microchannels with integrated interconnects for chip-to-chip and world-to-chip connections , 2008 .

[2]  Robert Bogue,et al.  MEMS sensors: past, present and future , 2007 .

[3]  James H. Smith,et al.  Micromachined pressure sensors: review and recent developments , 1997 .

[4]  Dario Izzo,et al.  Design Considerations and Deployment Simulations of Spinning Space Webs , 2007 .

[5]  S. Westwood,et al.  Design of Electrical Interconnect for SU-8 Microfluidic Systems , 2007, 2007 Canadian Conference on Electrical and Computer Engineering.

[6]  M. Vasile,et al.  Experimental analysis of laser ablated plumes for asteroid deflection and exploitation , 2013 .

[7]  Thomas Sinn,et al.  iSEDE DEMONSTRATOR ON HIGH ALTITUDE BALLOON BEXUS: INFLATABLE SATELLITE ENCOMPASSING DISAGGREGATED ELECTRONICS , 2013 .

[8]  Massimiliano Vasile,et al.  Results of REXUS12's Suaineadh Experiment , 2012 .

[9]  Fei Su,et al.  Test planning and test resource optimization for droplet-based microfluidic systems , 2004, ETS.

[10]  Chong H. Ahn,et al.  Institute of Physics Publishing Journal of Micromechanics and Microengineering a Review of Microvalves , 2022 .

[11]  C. Liu,et al.  Recent Developments in Polymer MEMS , 2007 .

[12]  Inderjit Chopra,et al.  Review of State of Art of Smart Structures and Integrated Systems , 2002 .

[13]  Nikolaos G. Tsagarakis,et al.  Improved modelling and assessment of pneumatic muscle actuators , 2000, Proceedings 2000 ICRA. Millennium Conference. IEEE International Conference on Robotics and Automation. Symposia Proceedings (Cat. No.00CH37065).

[14]  Hanspeter Schaub,et al.  Electron Flux Deflection Experiments with Coulomb Gossamer Structures , 2012 .

[15]  Thomas Sinn,et al.  Bio-inspired programmable matter for space applications , 2012 .

[16]  Robert Langer,et al.  A BioMEMS review: MEMS technology for physiologically integrated devices , 2004, Proceedings of the IEEE.

[17]  James R. Wertz,et al.  Space mission engineering : the new SMAD , 2011 .

[18]  Fei Su,et al.  Test Planning and Test Resource Optimization for Droplet-Based Microfluidic Systems , 2004, Proceedings. Ninth IEEE European Test Symposium, 2004. ETS 2004..

[19]  Ajit Khosla,et al.  Large scale micropatterning of multi-walled carbon nanotube/polydimethylsiloxane nanocomposite polymer on highly flexible 12×24 inch substrates , 2011, MOEMS-MEMS.

[20]  Ron Barrett,et al.  Pressure adaptive honeycomb: a new adaptive structure for aerospace applications , 2010, Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[21]  Ang Li,et al.  Fabrication and testing of thermally responsive hydrogel-based actuators using polymer heater elements for flexible microvalves , 2011, MOEMS-MEMS.

[22]  M. M. Mikulas,et al.  Inflatable Deployable Space Structures Technology Summary , 1998 .

[23]  Thomas Sinn,et al.  Design and development of a deployable self-inflating adaptive membrane , 2012 .

[24]  Bruce K. Gale,et al.  Determining the optimal PDMS–PDMS bonding technique for microfluidic devices , 2008 .

[25]  Bonnie L. Gray,et al.  Mechanically assembled polymer interconnects with dead volume analysis for microfluidic systems , 2007, SPIE MOEMS-MEMS.

[26]  Scott D. Collins,et al.  Interlocking mechanical and fluidic interconnections for microfluidic circuit boards , 2004 .

[27]  E. Wilson,et al.  The Heliotropism of Hydra , 1891, The American Naturalist.

[28]  Norman M. Wereley,et al.  Design and Testing of a Biologically Inspired Pneumatic Trailing Edge Flap System , 2008 .