Abstract
Requirement for shape stability of space structures such as barrel for space telescope tends to become more precisely. In addition to it, large size over 10 meters is sometimes required for such support structure to meet advanced science missions. To realize large and precise support structures, comprehensive techniques including prediction, measurement and stabilization techniques on orbit are needed. In this paper, we introduce some fundamental techniques to keep the precise shape for a slender box truss as a representative support structure. The structural deformation on orbit is induced by thermal distribution, disturbance (RW/MW/SAD etc.) and so on. At first, we analyzed temperature distribution and thermal distortion of the truss structure to predict the thermal deformation. The accuracy of analysis results is evaluated through experiments with a five-bay truss structure. Then, system identification is carried out to identify the stiffness of the structure because such identification of the stiffness becomes important for the precise prediction of thermal deformation in the case of indeterminate structure. As a first step, the stiffness matrix is identified by using particle swarm optimization method from the experimental data of natural frequency. By using the identified stiffness matrix, the natural frequency can be estimated within 1% error. At last, we attempt the shape control of truss structure by using artificial thermal expansion. It is experimentally shown that deformation of truss structure could be controlled with good accuracy, for example, within 30μm error for 1.9m height truss.
| Original language | English |
|---|---|
| Title of host publication | 61st International Astronautical Congress 2010, IAC 2010 |
| Pages | 6116-6121 |
| Number of pages | 6 |
| Volume | 8 |
| Publication status | Published - 2010 Dec 1 |
| Externally published | Yes |
| Event | 61st International Astronautical Congress 2010, IAC 2010 - Prague Duration: 2010 Sep 27 → 2010 Oct 1 |
Other
| Other | 61st International Astronautical Congress 2010, IAC 2010 |
|---|---|
| City | Prague |
| Period | 10/9/27 → 10/10/1 |
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ASJC Scopus subject areas
- Aerospace Engineering
- Astronomy and Astrophysics
Cite this
Prediction, measurement and stabilization of structural deformation on orbit. / Ishimura, Kosei; Senba, A.; Iwasa, T.; Ogi, Y.; Akita, T.; Furuya, H.; Minesugi, K.
61st International Astronautical Congress 2010, IAC 2010. Vol. 8 2010. p. 6116-6121.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Prediction, measurement and stabilization of structural deformation on orbit
AU - Ishimura, Kosei
AU - Senba, A.
AU - Iwasa, T.
AU - Ogi, Y.
AU - Akita, T.
AU - Furuya, H.
AU - Minesugi, K.
PY - 2010/12/1
Y1 - 2010/12/1
N2 - Requirement for shape stability of space structures such as barrel for space telescope tends to become more precisely. In addition to it, large size over 10 meters is sometimes required for such support structure to meet advanced science missions. To realize large and precise support structures, comprehensive techniques including prediction, measurement and stabilization techniques on orbit are needed. In this paper, we introduce some fundamental techniques to keep the precise shape for a slender box truss as a representative support structure. The structural deformation on orbit is induced by thermal distribution, disturbance (RW/MW/SAD etc.) and so on. At first, we analyzed temperature distribution and thermal distortion of the truss structure to predict the thermal deformation. The accuracy of analysis results is evaluated through experiments with a five-bay truss structure. Then, system identification is carried out to identify the stiffness of the structure because such identification of the stiffness becomes important for the precise prediction of thermal deformation in the case of indeterminate structure. As a first step, the stiffness matrix is identified by using particle swarm optimization method from the experimental data of natural frequency. By using the identified stiffness matrix, the natural frequency can be estimated within 1% error. At last, we attempt the shape control of truss structure by using artificial thermal expansion. It is experimentally shown that deformation of truss structure could be controlled with good accuracy, for example, within 30μm error for 1.9m height truss.
AB - Requirement for shape stability of space structures such as barrel for space telescope tends to become more precisely. In addition to it, large size over 10 meters is sometimes required for such support structure to meet advanced science missions. To realize large and precise support structures, comprehensive techniques including prediction, measurement and stabilization techniques on orbit are needed. In this paper, we introduce some fundamental techniques to keep the precise shape for a slender box truss as a representative support structure. The structural deformation on orbit is induced by thermal distribution, disturbance (RW/MW/SAD etc.) and so on. At first, we analyzed temperature distribution and thermal distortion of the truss structure to predict the thermal deformation. The accuracy of analysis results is evaluated through experiments with a five-bay truss structure. Then, system identification is carried out to identify the stiffness of the structure because such identification of the stiffness becomes important for the precise prediction of thermal deformation in the case of indeterminate structure. As a first step, the stiffness matrix is identified by using particle swarm optimization method from the experimental data of natural frequency. By using the identified stiffness matrix, the natural frequency can be estimated within 1% error. At last, we attempt the shape control of truss structure by using artificial thermal expansion. It is experimentally shown that deformation of truss structure could be controlled with good accuracy, for example, within 30μm error for 1.9m height truss.
UR - http://www.scopus.com/inward/record.url?scp=79959451650&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79959451650&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:79959451650
SN - 9781617823688
VL - 8
SP - 6116
EP - 6121
BT - 61st International Astronautical Congress 2010, IAC 2010
ER -