Research Of Stochastic Time Delay Compensation Based On Online Delay-Measurement For Networked Control Systems

With increasing complexity of control systems and fast development of network technologies, control systems based on networks are widely applied in the modern industry control due to its advantages of less wires, high reliability, good flexibility and share of information resources, etc. Control systems develop toward to be networked, integrated, distributed, intelligent. The control system is looped via network, and some new issues appear due to the limited network bandwidth, such as stochastic time delay, multiple-packet transmission, data-packets dropout and network scheduling. At present, the research of networked control systems becomes a focus in control engineering.The new methods of online stochastic time delay measurement and its compensation in the networked control system are studied in this dissertation. An embedded networked control experimental system is implemented porting with the μC/OS- Ⅱ real time operate system. An online delay measurement method based on hardware is presented in this thesis. Additionally, a stochastic time delay compensation strategy based on one step (multi step) predictive output is addressed and is validated by DC control using this experimental system. Main achievements are as follows:(1) A detailed summary of some basic contents, issues, and recent...