Command flow within TCS IV

Peregrine M. McGehee

doi:10.1117/12.308798

26 May 1998 Command flow within TCS IV

Peregrine M. McGehee

Proceedings Volume 3351, Telescope Control Systems III; (1998) https://doi.org/10.1117/12.308798
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

In this paper we present a control system design framework that supports advanced automation. The essential features include a hierarchical structure with independent subsystems, standardized command and status interfaces, high-level commands based on the operations model, and transformation of the operator's requests into subsystem demands. Described is an infrastructure consistent with this framework for applications based on the Experimental Physics and Industrial Control System toolkit. The design of the CFHT Telescope Control System Version Four (TCS IV) is presented as an example. TCS IV utilizes the concept of parallel virtual telescopes to regulate the flow of commands to the underlying subsystems. Each virtual telescope and each subsystem is characterized by a well-defined public interface. The virtual telescopes support movement of the associated beams within the mean or catalog coordinate systems. Parallel astrometric stacks implement the mean to observed coordinate transformations.

Citation Download Citation

Peregrine M. McGehee "Command flow within TCS IV", Proc. SPIE 3351, Telescope Control Systems III, (26 May 1998); https://doi.org/10.1117/12.308798

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