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13 December 2002 The New Swedish Solar Telescope Control System
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This paper describes the new Swedish solar telescope control system which is currently in the final phases of testing and tuning. The telescope has two current controlled motors per axis and encoder resolution of 0.0016 arcsecond per pulse. The servo consists of a cascaded position-velocity loop system implemented on a Compaq Alpha workstation class computer. The servo position correction loop runs at a frequency of 100 Hz whilst the faster velocity loop runs at 1KHz. This choice of servo allows a methodical tuning of gains because each gain is correcting a seperate frequency range. We shall describe the mechanical design employed in the telescope and the computer control. The real time requirements of the control servo will be explained along with how we have used standard commercial hardware and operating system to achieve this.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter M. Dettori and Göran Hosinsky "The New Swedish Solar Telescope Control System", Proc. SPIE 4848, Advanced Telescope and Instrumentation Control Software II, (13 December 2002);


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