LIGO控制和数据采集系统综述
An Overview of the LIGO Control and Data Acquisition System
摘要：
LIGO控制和数据系统（CDS）具有紧密耦合和高度集成的控制和数据采集系统。干涉仪的控制需要许多多输入多输出（MIMO）控制回路，这些回路在本地和跨越4公里干涉仪臂长闭合。除了提供闭环控制外，控制系统前端处理器还充当数据采集系统的数据采集单元（DCU）。必须收集这些前端和数据采集系统收集的数据并以1微秒的精度标记时间，并提供给全球诊断系统（GDS）等在线分析工具[1]。数据也被发送到LIGO数据分析系统（LDAS）[2]进行长期存储和离线分析。数据速率超过每秒5兆字节每干涉仪连续。各种前端处理器和数据采集系统之间的连接是通过光纤反射存储网络实现的。控制和数据采集系统都使用VME硬件和EQUIPWorks操作系统。本文将介绍LIGO CDS的概述，并讨论其设计的关键方面。
英文摘要：
The LIGO Control and Data system (CDS) features a tightly coupled and highly integrated control and data acquisition system. Control of the interferometers requires many Multiple Input Multiple Output (MIMO) control loops closed both locally and across the 4-kilometer interferometer arm lengths. In addition to providing the closed loop control, the control systems front end processors act as Data Collection Units (DCU) for the data acquisition system. Data collected by these front ends and the data acquisition system must be collected and time stamped to an accuracy of 1 microsecond and made available to on-line analysis tools such as the Global Diagnostics System (GDS)[1]. Data is also sent to the LIGO Data Analysis System (LDAS)[2] for long-term storage and off-line analysis. Data rates exceed 5 Mbytes per second per interferometer continuous. Connection between the various front end processors and the data acquisition system is achieved using fiber optic reflective memory networks. Both controls and data acquisition systems use VME hardware and VxWorks operating systems. This paper will present an overview of the LIGO CDS and discuss key aspects of its design.
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