Control electronics for an adaptive secondary mirror

Roberto Biasi; Luca Fini; Paolo Mantegazza; Valdemaro Biliotti; Federico Gori; Daniele Gallieni

doi:10.1117/12.321735

Translator Disclaimer

11 September 1998 Control electronics for an adaptive secondary mirror

Roberto Biasi; Luca Fini; Paolo Mantegazza; Valdemaro Biliotti; Federico Gori; Daniele Gallieni

Author Affiliations +

Proceedings Volume 3353, Adaptive Optical System Technologies; (1998) https://doi.org/10.1117/12.321735
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

The recent concept of an adaptive secondary mirror controlled by a large number of force actuators has been explored through the realization of a thirty actuators prototype. The design and implementation of the local position control electronics and real time software is presented. Both centralized and de-centralized control approaches are considered, and for the experimental implementation the de-centralized solution is adopted. The design is based on a digital approach. Mirror actuators are controlled by an array of DSPs. Each DSP controls two actuators: the position measurement are obtained from capacitive sensors co-located with the actuators and a local closed loop position control is implemented on the DSP to drive the voice coils. In the prototype unit, a bi- direcitonal fast serial line is used to exchange data with the wavefront computer. The communication link can be used to download program code and data to the DSPs thus allowing the greatest flexibility in the definition of algorithms and working parameters. The same link is used during mirror operation to issue position commands to the deformable mirror and to get back diagnostic data.

Citation Download Citation

Roberto Biasi, Luca Fini, Paolo Mantegazza, Valdemaro Biliotti, Federico Gori, and Daniele Gallieni "Control electronics for an adaptive secondary mirror", Proc. SPIE 3353, Adaptive Optical System Technologies, (11 September 1998); doi: 10.1117/12.321735; https://doi.org/10.1117/12.321735

ACCESS THE FULL ARTICLE

PERSONAL SIGN IN
Full access may be available with your subscription

Email or Username Forgot your username?

Password Forgot your password?

Show

Remember Email/Username on this computer

Remember Password

No SPIE account? Create an account

Institutional Access:

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $14.40

Non-members: $18.00 ADD TO CART

Show All Keywords

Keywords/Phrases

Search In:

Publication Years