Real-time communication schemes for Web-based 3D control laboratories

Networked Control System Laboratory(NCSLab) 3D is built on the basis of NCSLab which is a platform to carry out real-time control system experiments through the Internet and has been developed into a 3D version for conducting virtual experiments for now. To experiment with models in NCSLab 3D, the communication between the NetCon which is an algorithm simulator and the server as well as that between the server and the Web client is a key issue which needs to be addressed in the first place. This paper proposes a real-time communication method which can adapt the parameter to make the data transmission in the receiver synchronous with that in the sender. Thus, annoying problems such as the long time delay or data loss can be to a large extent avoided and real-time virtual experiment can be guaranteed. The one capacity water tank is taken as an example to verify the method and the result shows a good real-time performance.