The hardware control system for WEAVE at the William Herschel Telescope

International audienceWhen an alt-azimuth telescope is tracking at a specific field, it is necessary to use a de-rotator system to compensate the Earth's rotation of the field of view. In order, to keep the telescope tracking the field of view selected, the instrument will need to a rotation system for compensating it [1]. The new WEAVE [2] two degrees field of view requires a new field de-rotator on the top-end of the telescope. The rotator system has been designed with a direct drive motor which eliminates the need for mechanical transmission elements such as gearboxes, speed reducers, and worm gear drives. This design is a huge advantage for the system performance and lifetime because it eliminates undesirable characteristics such as long-time drift, elasticity, and backlash. The hardware control system has been developed with a Rockwell servo-drive and controller. The rotator has to be controlled by the high-level software which is also responsible for the telescope control. This paper summarizes the model developed for simulating and the software which will be used to accept the rotator system. A performance study is also carried out to test the CIP (Common Industrial Protocol) for communications between the high-level software and the rotator hardware

The hardware control system for WEAVE at the William Herschel Telescope

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Caminos Alternativos para la Sostenibilidad y el Buen Vivir

En este texto, las diversas perspectivas presentadas en el marco del desarrollo sostenible plantean un tránsito a la sustentabilidad, y de ahí que se considere como una alternativa al buen vivir. Se plantean propuestas a partir de casos documentados que la sociedad organizada trabaja y que brindan alternativas desde su propia racionalidad y sentir, así como el rol del Estado en los procesos sociales en los territorios rurales. Asimismo, se exponen algunos casos de intervención vía políticas públicas y de cuando la sociedad organizada es autogestionaria, y logra proyectos con resultados de impacto que, si bien no son espectaculares, sí dejan huella en su ámbito local de origen

HARMONI at ELT: overview of the capabilities and expected performance of the ELT's first light, adaptive optics assisted integral field spectrograph.

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