Dealing with Internet Transmission Delay and Data Loss from the Control Perspective

Abstract

AbstractFollowing on from the previous chapter, Chap. 7 describes how to deal with Internet transmission delay and data loss from the viewpoint of both the control system structure and compensation algorithms. Five control system structures are presented here: virtual supervision parameter control, model-based predictive display tele-operation, intelligent autonomy control, control system with a variable sampling time, and multi-rate control. Feedback and feed-forward time delay compensator design is also described in detail. A compensator located at the feedback channel is designed to overcome the time delay that occurs during the transmission from the local site to a remote site. Another compensator, in the feed-forward channel, is designed to compensate for the time delay occurring in the control action transmission. Simulations and experimental studies that focus on the virtual supervision parameter control, control with a variable sampling time, and multi-rate control with time delay compensation structures are described. They are designed for various requirements. The multi-rate control scheme presented with the time delay compensators offers a promising way to efficiently reduce the effect of Internet time delay on control performance, in which a two-level hierarchy is used. At the lower level, a local controller is implemented to control the plant at a higher frequency. At the higher level, a remote controller is employed to remotely regulate the desirable setpoint at a lower frequency for the local controller.KeywordsData LossTransmission DelayRemote SiteFeedback ChannelRemote Control SystemThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.