Title :
High speed and high precision servo system for large chopping secondary mirror
Author :
Ueda, Takaharu ; Ogata, Daisuke ; Mizuno, Shigeki ; Yamamoto, Tetsu
Author_Institution :
Mitsubishi Electric Corp., Hyogo, Japan
fDate :
28 Oct-1 Nov 1991
Abstract :
A high-speed and high-precision servo system is proposed for large chopping secondary mirror systems. It is also confirmed by experimental results that the servo system is very effective in realizing a high-performance chopping secondary mirror. The servo system has the following features: a mirror swung by a torque waveform which does not excite mechanical resonances, and realizes the desired positioning; a torque canceling feedback loop which uses the same stabilizing compensator as the mirror-swinging loop; and a two-degree-of-freedom control system, whose stability and speed of response are independently designed. From experimental results obtained from the test plant of the chopping secondary mirror of a 7.5 m infrared telescope, it is confirmed that the proposed servo is very effective in suppressing the remaining vibrations in the angular position of the mirror
Keywords :
astronomical telescopes; feedback; mirrors; optical variables control; position control; servomechanisms; stability; chopping secondary mirror; high precision servo system; high-speed; infrared telescope; position control; stability; stabilizing compensator; torque canceling feedback loop; torque waveform; two-degree-of-freedom control system; vibrations suppression; Control systems; Feedback loop; Mirrors; Resonance; Servomechanisms; Stability; Telescopes; Testing; Torque control; Vibrations;
Conference_Titel :
Industrial Electronics, Control and Instrumentation, 1991. Proceedings. IECON '91., 1991 International Conference on
Conference_Location :
Kobe
Print_ISBN :
0-87942-688-8
DOI :
10.1109/IECON.1991.239355
