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Simulation requirements for the large deployable reflector (ldr)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Soosaar, K. |
| Copyright Year | 1984 |
| Description | Simulation tools for the large deployable reflector (LDR) are discussed. These tools are often the transfer function variety equations. However, transfer functions are inadequate to represent time-varying systems for multiple control systems with overlapping bandwidths characterized by multi-input, multi-output features. Frequency domain approaches are the useful design tools, but a full-up simulation is needed. Because of the need for a dedicated computer for high frequency multi degree of freedom components encountered, non-real time smulation is preferred. Large numerical analysis software programs are useful only to receive inputs and provide output to the next block, and should be kept out of the direct loop of simulation. The following blocks make up the simulation. The thermal model block is a classical heat transfer program. It is a non-steady state program. The quasistatic block deals with problems associated with rigid body control of reflector segments. The steady state block assembles data into equations of motion and dynamics. A differential raytrace is obtained to establish a change in wave aberrations. The observation scene is described. The focal plane module converts the photon intensity impinging on it into electron streams or into permanent film records. |
| File Size | 2578391 |
| Page Count | 30 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19840024247 |
| Archival Resource Key | ark:/13960/t2z36np5k |
| Language | English |
| Publisher Date | 1984-07-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Transfer Functions Airborne/spaceborne Computers Performance Prediction Spaceborne Telescopes Photons Equations of Motion Focal Plane Devices Computer Programs Reflecting Telescopes Reflectors Infrared Telescopes Simulation Signal Processing Ray Tracing Mathematical Models Large Deployable Reflector Thermal Analysis Structural Analysis Large Space Structures Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
