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Record Details

Record 67 of 31886
Integrated Modeling of Advanced Opto-Mechanical Systems
External Online Source: hdl:2014/39657
Author and Affiliation:
Briggs, Hugh C.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Phillips, Charles J.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Orzewalla, Mathew A.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Abstract: The design of optical hardware for space applications is particularly challenging when developing high performance, novel systems that have no precedent. Integrated modeling and analysis of such opto-mechanical systems seeks to describe the end-to-end performance of the hardware using mission-relevant metrics. This multidisciplinary analysis might start with thermal disturbances from observation maneuvers, compute the system temperatures, compute the distorted positions and shapes of the hardware and compute the resulting optical performance. Dynamic disturbances such as reaction wheel imbalance or inertia imbalance of optical delay lines might be applied to a structural dynamic model and used in a guidance and control analysis. Mission-relevant science metrics might include wavefront quality, pointing error or imaging stability. Assembling a tool chain that can be both nimble and effective when scaled to the high fidelity models of detail design has been challenging. An integrated thermal, mechanical and optical analysis capability suitable for detail design has been developed and verified through experimental measurement. This capability was used in the design of flight-like breadboard hardware and development of a test apparatus that established both the level of performance of the hardware and the validity of the analysis. The analysis includes prediction of the thermal environment of the test chamber, detailed temperature distributions on the breadboard hardware, fine scale deformations of the optical elements, and computation of the wavefront quality using geometric optics. A battery of tests were conducted to assess the experiment data acquisition, measurement and control system and to establish the performance of the hardware design and accuracy of the integrated modeling. Thermal loads that represent operational observing maneuvers were imposed and the hardware optical performance was measured and compared to analytical predictions.
Publication Date: Jan 01, 2006
Document ID:
20060050769
(Acquired Nov 01, 2006)
Subject Category: SPACECRAFT INSTRUMENTATION AND ASTRIONICS
Document Type: Preprint
Meeting Information: 47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference; 1-4 May 2006; Newport RI; United States
Meeting Sponsor: American Inst. of Aeronautics and Astronautics; United States
American Society of Mechanical Engineers; United States
American Society of Civil Engineers; New York, NY, United States
American Helicopter Society, Inc.; United States
American Society for Composites; Dayton, OH, United States
Financial Sponsor: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
Organization Source: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
Description: 8p; In English; Original contains color illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: DYNAMIC MODELS; PREDICTION ANALYSIS TECHNIQUES; IMAGING TECHNIQUES; OPTICAL EQUIPMENT; COMPUTERIZED SIMULATION; COMPUTER AIDED DESIGN; MULTIDISCIPLINARY DESIGN OPTIMIZATION; ASTRONOMICAL INTERFEROMETRY
Other Descriptors: INTEGRATED MODELING; OPTOMECHANICAL ANALYSIS
Availability Source: Other Sources
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