Analysis of the alidade temperature behaviour of the Medicina VLBI radiotelescope

被引：17

作者：

Ambrosini, R ^{[1
]}

Grueff, G ^{[1
]}

Morsiani, M ^{[1
]}

Maccaferri, G ^{[1
]}

Zacchiroli, P ^{[1
]}

Orfei, A ^{[1
]}

机构：

[1] UNIV BOLOGNA,DIPARTMENTO ASTRON,I-40126 BOLOGNA,ITALY

来源：

ASTROPHYSICS AND SPACE SCIENCE | 1996年 / 239卷 / 02期

关键词：

radiotelescopes pointing; thermal analysis; FEA analysis; thermal shields;

D O I：

10.1007/BF00645779

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Upgrading existing radiotelescopes to operate at higher frequencies requires not only a better reflecting surface accuracy, but also more precise pointing capability. To analyse the thermal behaviour of the 32 metre VLBI parabola at Medicina, we have installed accurate temperature sensors on the pedestal beams of the antenna and an inclinometer at the elevation axis. The thermal model presented here, starts from a structural Finite Elements Analysis of the radiotelescope and can closely predict the deformations measured by the inclinometer, even in the worst solar radiation conditions. This analysis allows also insights into future improvements.

引用

页码：247 / 258

页数：12