Lightweight Node.js & EJsS-based Web Server for Remote Control Laboratories^*

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• 作者：E. Besada-Portas^* ; ^{ebesada@ucm.es" class="auth_mail" title="E-mail the corresponding author} ; J. Bermú ; dez-Ortega^* ; ^{juliberm@ucm.es" class="auth_mail" title="E-mail the corresponding author} ; L. de la Torre^** ; ^{ldelatorre@dia.uned.es" class="auth_mail" title="E-mail the corresponding author} ; J.A. Ló ; pez-Orozco^* ; ^{jalopez@ucm.es" class="auth_mail" title="E-mail the corresponding author} ; J.M. de la Cruz^* ; ^{jmcruz@ucm.es" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Virtual and Remote Labs ; Internet-Based Control Education ; Node.js ; EJsS ; TwinCAT ; Lab VIEW ; Mobile devices
• 刊名：IFAC-PapersOnLine
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：49
• 期：6
• 页码：127-132
• 全文大小：1151 K

文摘

This paper presents a new approach to develop a web server for remote Systems Engineering and Automatic Control laboratories based on Node.js and Easy JavaScript Simulations (EJsS). On one hand, Node.js, a JavaScript development and runtime platform to distribute non-blocking data-intensive event-driven real-time applications across different devices, is used 1) as the server that hosts the laboratory web-pages and 2) to support the real-time communication between the controller back-end (application that closes the control loop over the plant) and front-end (graphical user interface that lets students parametrize and observe the behavior of the controllers/systems under study from any web-browser). On the other one, EJsS, a powerful intuitive graphical tool to develop graphical/interactive interfaces and simulations, is used to generate the JavaScript and HTML5 controller front-end. The new strategy, deployable over different operating system (Linux, Mac OS and Windows) and against different controller back-ends (e.g. an application developed in C, a TwinCAT Programable Logic Controller, and a LabVIEW Virtual Instrument), is a lightweight versatile solution to set up a friendly remote control laboratory whose experiments can be accessed by the students from different types of devices (PCs, laptops, tablets and smartphones).