Title :
Feasibility analysis for networked control systems by simulation in Modelica
Author :
Liu, Liu ; Frey, Georg
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Kaiserslautern, Kaiserslautern
Abstract :
Technological advancements in communication and embedded computing lead to the increasing application of decentralized structures in automation and control. The decentralization adds new behavior in the form of - often non-deterministic - delays to the resulting networked control systems (NCS). To analyze a closed loop control system including network communication, simulation is a viable approach. In this work a library for the simulation of controller and network hardware to be used in combination with process models in closed loop is presented. The library is implemented in the Modelica language. To allow easy application a structure conserving component based modeling approach is followed. The applicability is shown by analyzing the performance of a robotics control system where communication is realized alternatively with Ethernet and CAN bus.
Keywords :
closed loop systems; decentralised control; delay systems; delays; distributed control; local area networks; CAN bus; Modelica language; closed loop control system; controller simulation; decentralized structures; delays; embedded computing; ethernet; feasibility analysis; networked control systems; robotics control system; Analytical models; Automatic control; Automation; Communication system control; Communications technology; Computational modeling; Control system analysis; Embedded computing; Libraries; Networked control systems;
Conference_Titel :
Emerging Technologies and Factory Automation, 2008. ETFA 2008. IEEE International Conference on
Conference_Location :
Hamburg
Print_ISBN :
978-1-4244-1505-2
Electronic_ISBN :
978-1-4244-1506-9
DOI :
10.1109/ETFA.2008.4638480