ABSTRACT

This paper presents an overview of the developments performed at the European Laboratory for Structural Assessment (ELSA) of the Joint Research Centre of European Commission concerning the new generation of servo-hydraulic real-time digital controller/acquisition system adopted in large scale experiments. The hardware architecture is based on EtherCAT® modules that guarantee a versatile and modular system easily adaptable to changing requirements (a typical situation experienced at ELSA with custom adapted non-standardized large scale structural experiments). Other fundamental features of this system are that all the analog signals are digitalized in the proximity of the transducers reducing noise-to-signal ratio (a great advantage for Pseudo-dynamic tests but in general for all experimentation), and all the different slave controllers communicate at each time sampling through a deterministic robust digital bus. In addition to the increasing computer performances, the developed simplified software architecture does offer a substantial improvement of control quality in terms of speed, safety, and accuracy compared with conventional/commercial systems.

摘要

本文概述了欧洲委员会联合研究中心的欧洲结构评估实验室 (ELSA) 在大规模实验中采用的新一代伺服液压实时数字控制器/采集系统的发展。硬件架构基于 EtherCAT® 模块，保证了一个多功能的模块化系统，可以轻松适应不断变化的需求（ELSA 经历的典型情况，定制的非标准化大规模结构实验）。该系统的其他基本特征是，所有模拟信号都在传感器附近进行数字化，从而降低了信噪比（对于伪动态测试来说是一个很大的优势，但通常对于所有实验来说都是如此），并且所有不同的从控制器在每次采样时都通过确定性的稳健数字总线进行通信。除了提高计算机性能之外，与传统/商业系统相比，开发的简化软件架构在速度、安全性和准确性方面确实提供了显着的控制质量改进。