Zhang Zhengquan

Development of CAN Bus Application Layer Protocol for Beam Control System

A special Controller Area Network (CAN) bus application layer protocol is designed for the high reliable and high real-time control network of the beam control system. In this paper, messages on the network are classified and the identifier coding, data coding, network management mechanism and physical interface are defined. Then network load analysis for the real-time control network is introduced. At last a test platform based on CAN bus for the beam control system is built to validate the design. Experiment results indicate that the developed CAN control network for the beam control system is very reliable and has good real-time performance and low network load rate.

Design of the Master Control System of the Array Antenna Based on the VxWorks

This paper aimed at the features of the array antenna that with large number units, short work cycle, complex electromagnetic environment and high stability requirement, designed the master control system which based on the VxWorks real-time operating system. The master control system as a whole array antenna control center needed to connect multiple subsystems. After a full investigation, the paper proposed the following scheme: used the Ethernet port for the remote control and received status information feedback, RS485 serial port to receive external data, set up the CAN network to connect the slave machines, to achieve the control of the array antenna.