| Summary: | 碩士 === 國立臺灣科技大學 === 自動化及控制研究所 === 98 === The conception of “Networked Control Systems (NCS)” was presented by Walsh G. C. et al. from the University of Maryland in 1999. The NCSs are different to the traditional control systems which are the integration of the automation and control area and network communication area. The simple NCS architecture composed of controller node and the actuator/sensor node, and each node transmitted data such as control signal and sensor measurement in the form of information packages through a real-time network (i.e. wired network, wireless network or CAN bus etc.).
When a NCS operates over the communication network, one of the major challenges is the network-induced delay in data transfer among the controllers, actuators, and sensors. This delay may degrade system performance and even cause an unstable system.
This thesis proposes a Generalized Predictive Control (GPC) with the Kalman state estimator to cope with network-induced delay and packet loss. The GPC is implemented in Wireless NCS (WiNCS) based on IEEE 802.11b, using a NCS model and Network Simulator version 2 (NS2) for simulation and analyzing the performance with the condition of different delay and packets loss rate.
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