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Proceedings Paper

Control strategy of LAROCA delay line
Author(s): Michel Sghedoni; Jean Marc LeBlanc; Michel Dugue; Pierre Antonelli; Pascal Boucher
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Paper Abstract

The 3-meter stroke `LAROCA' Delay Line (DL) was designed, built and tested in France in 1993, with full success in terms of performance and of length and loading scalability. The highly stringent stability requirements in delay line motion led to devise an original guiding and motorizing concept that affords outstanding displacement accuracy, minimizing lateral and, more importantly, longitudinal vibrations. LAROCA's architecture hinges on a two-stage concept: a high-precision upper carriage, for precision positioning, controlled for longitudinal vibration compensation by a high-bandwidth, hybrid analog/digital controller, and a less accurate lower carriage for global DL translation on a two-cylindrical-rail track using a classical position control system. Excellent interstage decoupling, using a contactless suspension, yields long-stroke capability together with the required stability of the high- precision stage. After a presentation of the LAROCA project requirements and an overview of the general architecture, this paper describes the overall servo-control subsystem. Finally some important results are presented.

Paper Details

Date Published: 4 October 1994
PDF: 11 pages
Proc. SPIE 2264, Vibration Monitoring and Control, (4 October 1994); doi: 10.1117/12.188875
Show Author Affiliations
Michel Sghedoni, Aerospatiale (France)
Jean Marc LeBlanc, Aerospatiale (France)
Michel Dugue, Observatoire de la Cote d'Azur (France)
Pierre Antonelli, Observatoire de la Cote d'Azur (France)
Pascal Boucher, Composants et Systemes de Precision/CSP (France)


Published in SPIE Proceedings Vol. 2264:
Vibration Monitoring and Control
Colin G. Gordon, Editor(s)

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