Design And Study On The Adjusting System Of The Cable-mesh Reflector For The Large Radio Telescope

In this dissertation, the field bus technology and embedded system are studied deeply. The hardware and software of the node controller are designed for cable-mesh reflector of the Large Radio Telescope (LT) based on the LonWorks.Firstly, researching deeply the field bus technology, control system of the cable-mesh reflector is designed based on LonWorks and its key technology is studied in detail. Further, the communication medium and router which are indispensable to network communication are introduced and selected.Then, comparing the performances and structure of kinds of Micro Processor Unit (MPU), the Atmel AT91RM9200 is chose and introduced in detail. The node controller is proposed for cable-mesh reflector using the MPU and each module is designed and discussed.Finally, considering to the MPU, the embedded operating system μC/OS-Ⅱ is chose and applied into AT91RM9200. The program of the node controller is made.