Network Control Systems, Scheduling And Control Co-design

This thesis based on the project "Integrated design of Control and Real-Time Scheduling in networked control systems" sponsored by the National Science Foundation. Network control system (NCS) is a synthetic application which combines control science, computer science and network technology. The competition of network resources and propagation delay raise a new scientific field where traditional control theories and methodology can be applied. Network scheduling, for instance, is a essential part of this novel domain. Based on existent results on control network performance and scheduling in protocol layer, the thesis analyzes the scheduling algorithm of networked control systems in application layer, and structures multi-task networked control systems for scheduling simulation in virtual platform. In addition, this thesis explores technologies for integration of control and scheduling design. The influence of sampling period to NCS is discussed. Based on control performance optimization and network scheduling condition, considering system control and network scheduling, an optimized model and sampling period selection algorithm are proposed. An example shows that the algorithm satisfies performance requirement for NCS, optimizes network scheduling, and improves network efficiency.