This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Thermal Stability Analysis in the Frequency Domain using the ESATAN Thermal Suite
Technical Paper
2008-01-2078
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
An increasing number of spacecraft missions have very stringent requirements for thermal stability to avoid thermally driven noise from affecting the main observables. For example, it may be necessary to reduce temperature fluctuations in the neighbourhood of the instrument below micro-Kelvin (μK). Consequently, the influence of fluctuations in boundary temperature or internal power dissipation on temperature at the instrument detector must be precisely evaluated.
Thermal stability requirements are usually expressed as an upper limit on the linear spectrum density (LSD) of temperature fluctuations. This indicates the strength of the response to a perturbation of a given frequency, and is usually stated in units of K/√Hz. The LSD can be estimated by running a succession of transient simulations and applying Fast Fourier Transforms techniques, but this method is time-consuming and has numerical limitations. An alternative approach is to linearise the system and go directly to the frequency domain, in order to compute the transfer function from which the LSD can be obtained.
The latter analytical capability is now fully integrated into the ESATAN Thermal Suite. A new solution module computes the frequency-response transfer function from which the LSD can be calculated. This innovative integration into a thermal network software allows you to perform the core of the thermal stability analysis entirely within a single environment.
Recommended Content
Technical Paper | Flight Control Actuation System for the B-2 Advanced Technology Bomber |
Technical Paper | Fatigue Life Prediction of MAG-Welded Thin-Sheet Structures |
Technical Paper | A SysML-Based Methodology in a Concurrent Satellite Design Process |
Authors
Citation
Brouquet, H., Strutt, J., Fertin, D., and Molon, M., "Thermal Stability Analysis in the Frequency Domain using the ESATAN Thermal Suite," SAE Technical Paper 2008-01-2078, 2008, https://doi.org/10.4271/2008-01-2078.Also In
References
- LISA and its In-Flight Test Precursor SMART-2 Vitale S. et al. Nuclear Physics B (Proc. Suppl.) 110 2002 209 216
- Testing LISA drag-free control with the LISA technology package flight experiment Bortoluzzi D. et al. Class. Quantum Grav. 20 2003 S89 S97
- Thermal gradient-induced forces on geodesic reference masses for LISA Carbone L. et al. PHYSICAL REVIEW D 76 2007
- LISA Pathfinder Thermal Design and Micro-Disturbance consideration Barraclough S. et al.
- Use of Spectral Analysis in Thermal Stability Verification Barbagallo G. Stramaccioni D. ESTEC Noordwijk, The Netherlands
- The Use of Fast Fourier Transform for the Estimation of Power Spectra: A Method Based on Time Averaging Over Short, Modified Periodograms IEEE Transactions on Audio Electroacoustics AU-15 June 1967 70 73
- Thermal Analysis for Systems Perturbed in the Linear Domain Method Development and Numerical Validation Molina Marco Franzoso Alberto Giacomazzo Matteo Carlo Gavazzi Space SpA