Design and Implementation of a Statechart Based Reconfigurable Elevator Controller参考.doc

编号： 毕业设计(论文)外文翻译 （原文） 学 院： 机电工程学院 专 业： 电气工程及其自动化 学生姓名： 梁君剑 学 号： 指导教师单位： 机电工程学院 姓 名： 范兴明 职 称： 副教授 2012年5月2日 2011 6th International Conference on Industrial and Information Systems, ICIIS 2011, Aug. 16-19, 2011, Sri Lanka Design and Implementation of a Statechart Based Reconfigurable Elevator Controller H.P.A.P. Jayawardana, Student Member, IEEE, H.W.K.M. Amarasekara, Student Member, IEEE, P.T.S. Peelikumbura, W.A.K.C. Jayathilaka, S.G. Abeyaratne, Member, IEEE and S.D. Dewasurendra Abstract- This paper presents a simple and clear method to design and implement a reconfigurable elevator controller using an FPGA, which can be implemented for an elevator with any (N) number of floors, with specified inputs and outputs. A model based design approach was followed. We started from a state chart model developed for a prototype elevator with three floors. Extension of the model for a variable number of floors was considered. Controller for the prototype system was implemented in ladder logic on a PLC and the limitations of that approach with regard to re-configurability were identified: viz., in the extension of elevator controller for ‘N’ no of floors. Next VHDL code was developed for a reconfigurable elevator controller where, by changing a variable corresponding to the required number of floors, the suitable code can be generated. The controller thus generated can be implemented in an FPGA. The method was successfully tested on a Xilinx Spartan 3ANFPGA. Index Terms- Elevator, FPGA, PLC, Reconfigurable, State Chart, VHDL I. INTRODUCTION In control and automation industry, Programmable Logic Controllers (PLCs) are commonly used to implement controls for complex reactive systems, primarily because of their easy programming environments based on IEC-61131-3. However, they are meant for sequential event processing and not for hard real-time reactive environments wh