Variable emissivity through MEMS technology

  title={Variable emissivity through MEMS technology},
  author={Ann Garrison Darrin and Robert Osiander and John L. Champion and Theodore D. Swanson and Donya Douglas and Lisa M. Grob},
  journal={ITHERM 2000. The Seventh Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (Cat. No.00CH37069)},
  • A. Garrison Darrin, R. Osiander, +3 authors L. Grob
  • Published 23 May 2000
  • Computer Science
  • ITHERM 2000. The Seventh Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (Cat. No.00CH37069)
This paper discusses a new technology for variable emissivity (vari-e) radiator surfaces, which has significant advantages over traditional radiators and promises an alternative design technique for future spacecraft thermal control systems. All spacecraft rely on radiative surfaces to dissipate waste heat. These radiators have special coatings, typically with a low solar absorptivity and a high infrared-red emissivity, that are intended to optimize performance under the expected heat load and… Expand

Figures and Tables from this paper

Preliminary design and comparative study of thermal control in a nanosatellite through smart variable emissivity surfaces
The thermal radiation that is rejected or absorbed into deep space is highly variable. Ultralight smart surfaces with arrays of unit cells can be designed to change their effective emissivity andExpand
Variable Emissivity Surfaces for Micro and Nano-satellites
Abstract Micro and Nano-satellites with their low thermal capacitance are vulnerable to rapid temperature fluctuations. Therefore, thermal control becomes more important, but the limitations on massExpand
Thermal Analysis of Micro-Column Arrays for Tailored Temperature Control in Space
Lightweight yet precise, temperature control protocols are critical in a variety of applications. This is especially true in space where weight and volume are at a premium and reliability isExpand
A Novel Method for Measurement of Total Hemispherical Emissivity
Abstract : This report was developed under a SBIR contract. This paper describes a heat flux-based method for measuring emissivity of a surface. In this method the emissivity of a surface isExpand
Controlling Variable Emittance (MEMS) Coatings for space applications
  • D. Farrar, W. Schneider, +4 authors T. Swanson
  • Engineering
  • ITherm 2002. Eighth Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (Cat. No.02CH37258)
  • 2002
Small spacecraft, including micro and nanosats, as they are envisioned for future missions, will require an alternative means to achieve thermal control due to their small power and mass budgets. OneExpand
Development of the Variable Emittance Thermal Suite for the Space Technology 5 Microsatellite
The advent of very small satellites, such as nano and microsatellites, logically leads to a requirement for smaller thermal control subsystems. In addition, the thermal control needs of the smallerExpand
Performance Analysis of an Electrostatic Switched Radiator Using Heat-Flux-Based Emissivity Measurement
The heat-flux-based emissivity measurement technique developed in our earlier work has been used to study the performance of an electrostatic switched radiator. The capability of fast and accurateExpand
Design and packaging for a microelectromechanical thermal switch radiator
A technology based on a thermal switch which controls the conductivity between the radiator and a highly-emissive surface is described, which is going to be tested aboard MIDSTAR 1, a small satellite being designed and built by students at the United States Naval Academy. Expand
A Passive, Adaptive and Autonomous Gas Gap Heat Switch
We report on the development of a heat switch for autonomous temperature control of electronic components in a satellite. A heat switch can modulate when needed between roles of a good thermalExpand
Micro Louvers for Micro and Nano-Satellites Thermal Control
Micro and Nano-satellites with their low thermal capacitance are vulnerable to rapid temperature fluctuations. Therefore, thermal control becomes more important, but the limitations on mass andExpand


Parametric study of variable emissivity radiator surfaces
The goal of spacecraft thermal design is to accommodate a high function satellite in a low weight and real estate package. The extreme environments that the satellite is exposed during its orbit areExpand
MEMS Louvers for Thermal Control
Mechanical louvers have frequently been used for spacecraft and instrument thermal control purposes. These devices typically consist of parallel or radial vanes, which can be opened or closed to varyExpand
Average power control and positioning of polysilicon thermal actuators
This paper reports on characterizing and modeling the behavior of micromachined polysilicon thermal actuators when driven by DC or pulsed drive signals. Thermal actuators can be controlled andExpand
Performance and reliability of a new MEMS electrostatic lateral output motor
Relative humidity (RH) effects on the performance, reliability and durability of a new MEMS lateral output motor were determined in this study. The parallel plate motor design provides greater forceExpand
The effect of humidity on the reliability of a surface micromachined microengine
  • D. Tanner, J. Walraven, +5 authors S. Miller
  • Materials Science
  • 1999 IEEE International Reliability Physics Symposium Proceedings. 37th Annual (Cat. No.99CH36296)
  • 1999
Humidity is shown to be a strong factor in the wear of rubbing surfaces in polysilicon micromachines. We demonstrate that very low humidity can lead to very high wear without a significant change inExpand
MEMS Reliability Assurance Guidelines for Space Applications
This guide is a reference for understanding the various aspects of microelectromechanical systems, or MEMS, with an emphasis on device reliability. Material properties, failure mechanisms, processingExpand
Satellite thermal control handbook
Satellite Thermal Control Handbook, published by The Aerospace Press and distributed by AIAA, is a compendium of corporate knowledge and heritage of thermal control of unmanned Earth-orbitingExpand
Low temperature crystallised Ti-rich NiTi shape memory alloy films for microactuators
Obtaining low temperature crystallised NiTi films would ensure a good compatibility with microelectronics processes and allow deposition on substrates that could not endure high temperatures, likeExpand
Big benefits from tiny technologies: micro-nanotechnology applications in future space systems
An overview of the micro-nanotechnology field is presented with application toward future space systems. Specific discussions are presented on the insertion of MEMS, MOEMS and quantum effectExpand