27 September 2004 to 1 October 2004
Interlaken, Switzerland
Europe/Zurich timezone

Raw Ethernet based hybrid control system for the automatic control of suspended masses in gravitational waves interferometric detectors

28 Sep 2004, 10:00
1h
Coffee (Interlaken, Switzerland)

Coffee

Interlaken, Switzerland

Board: 6
poster Track 1 - Online Computing Poster Session 1

Speaker

A. Eleuteri (DIPARTIMENTO DI SCIENZE FISICHE - UNIVERSITà DI NAPOLI FEDERICO II)

Description

In this paper we examine the performance of the raw Ethernet protocol in deterministic, low-cost, real-time communication. Very few applications have been reported until now, and they focus on the use of the TCP and UDP protocols, which however add a sensible overhead to the communication and reduce the useful bandwidth. We show how low-level Ethernet access can be used for peer-to-peer, short distance communication, and how it allows the writing of applications requiring large bandwidth. We show some examples running on the Lynx real-time OS and on Linux, both in mixed and homogeneous environments. As an example of application of this technique, we describe the architecture of an hybrid Ethernet based real-time control system prototype we implemented in Napoli, discussing its characteristics and performances. Finally we discuss its application to the real-time control of a suspended mass of the mode cleaner of the 3m prototype optical interferometer for gravitational wave detection operational in Napoli.

Primary authors

A. Eleuteri (DIPARTIMENTO DI SCIENZE FISICHE - UNIVERSITà DI NAPOLI FEDERICO II) F. Acernese (Dipartimento di Scienze Fisiche - Università di Salerno) F. Barone (Dipartimento di Scienze Farmaceutiche - Università di Salerno) G. RUSSO (Dipartimento di Scienze Fisiche - Università di Napoli Federico II) I. Ricciardi (Dipartimento di Scienze Fisiche - Università di Napoli Federico II) K. Qipiani (INFN - sez. Napoli) L. Milano (Dipartimento di Scienze Fisiche - Università di Napoli Federico II) R. De Rosa (Dipartimento di Scienze Fisiche - Università di Napoli Federico II) S. Pardi (Dipartimento di Matematica ed Applicazioni "R.Caccioppoli")

Presentation Materials