You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
17 September 2012Development of a compact precision linear actuator for the active surface upgrade of the Delingha 13.7-m radio telescope
The Delingha 13.7-m radio telescope is to be upgraded with an active surface for multi-beam observation at 3 mm
wavelength. Its primary reflector is paved with 72 aluminum panels which are originally supported by 480 fixtures. One
of the critical tasks associated with the upgrade program is development of precision linear displacement actuators to
replace the panel fixtures hence to Listed first in the upgrade program is actively drive and position the panels. The linear
actuator is required to fit the existing positions, dimensions and connections of the panels and the backup structure, also
implicitly required to be as compact and lightweighted as possible. This paper is to report in detail the development and
experiment of the compact, folded, precision linear actuator according to given technique requirements and constraints,
including the description of the flexible adaption of the fixture of the actuators and the special design of the connecting
mechanism with the panels. The experiment system is established with one of the spare panels of the telescope, and six
sets of actuator and control electronics are included for driving the panel. This paper will present the test results
measured on a single actuator prototype as well as the actuators working together in the spare panel experiment. The test
results prove that the actuator manifests positioning accuracy of microns and load capacity of 12 kg. The related
connection and electronics design of the actuator also meets the requirements of the update program of the telescope.
The alert did not successfully save. Please try again later.
Guohua Zhou, Aihua Li, Dehua Yang, Zhenchao Zhang, Guoping Li, "Development of a compact precision linear actuator for the active surface upgrade of the Delingha 13.7-m radio telescope," Proc. SPIE 8444, Ground-based and Airborne Telescopes IV, 84444D (17 September 2012);