In order to reduce the load rate of CAN bus and improve the real-time performance of control system, CAN bus control system of a pure electric vehicle is studied. Communication messages of each node are optimized and ...In order to reduce the load rate of CAN bus and improve the real-time performance of control system, CAN bus control system of a pure electric vehicle is studied. Communication messages of each node are optimized and redefined by sorting the message into three types： control message, status message and alann message. Event triggered mode is added to the communication way of CAN bus, and the communication control strategy of the vehicle is made. It is proved that CAN bus load rate of control system is reduced after optimization, and the real-time performance of communication is improved effectively.展开更多
A novel distributed numerical control (DNC) integrated system based on plug-in software technology is proposed. It connects new or old numerical control (NC) machine tools which have inhomogeneous numerical control sy...A novel distributed numerical control (DNC) integrated system based on plug-in software technology is proposed. It connects new or old numerical control (NC) machine tools which have inhomogeneous numerical control systems with CAD/CAM system by CANbus network. A DNC computer is able to control 15 sets of NC machine tools reliably at the same time. The novel DNC system increases the efficiency of machine tools and improve the production management level by realizing non-paper production, agile manufacturing, networked manufacturing and so on in the near future. Key technologies to construct the novel DNC integrated system include the integration of inhomogeneous numerical control systems, NC program restart, and algorithm for communication competition. Such system has demonstrated successful applications in some corporations that have acquired good economic benefits and social effects.展开更多
his paper studies the vehicle CAN bus control technology, and analyzes the control system of automobile based on CAN technology. This paper focus on the design of single-chip microcomputer STC89C52 be as the platform ...his paper studies the vehicle CAN bus control technology, and analyzes the control system of automobile based on CAN technology. This paper focus on the design of single-chip microcomputer STC89C52 be as the platform to achieve the design of CAN bus, introduce in detail the structure and working principle of SJA1000 and PCA82C250, and on basis of it, we design the CAN bus interface, and gives the hardware circuit design and software process of SJA1000 initialization, receiving, sending message. The system can give some subsequent reference for CAN bus application.展开更多
文摘In order to reduce the load rate of CAN bus and improve the real-time performance of control system, CAN bus control system of a pure electric vehicle is studied. Communication messages of each node are optimized and redefined by sorting the message into three types： control message, status message and alann message. Event triggered mode is added to the communication way of CAN bus, and the communication control strategy of the vehicle is made. It is proved that CAN bus load rate of control system is reduced after optimization, and the real-time performance of communication is improved effectively.
文摘A novel distributed numerical control (DNC) integrated system based on plug-in software technology is proposed. It connects new or old numerical control (NC) machine tools which have inhomogeneous numerical control systems with CAD/CAM system by CANbus network. A DNC computer is able to control 15 sets of NC machine tools reliably at the same time. The novel DNC system increases the efficiency of machine tools and improve the production management level by realizing non-paper production, agile manufacturing, networked manufacturing and so on in the near future. Key technologies to construct the novel DNC integrated system include the integration of inhomogeneous numerical control systems, NC program restart, and algorithm for communication competition. Such system has demonstrated successful applications in some corporations that have acquired good economic benefits and social effects.
文摘his paper studies the vehicle CAN bus control technology, and analyzes the control system of automobile based on CAN technology. This paper focus on the design of single-chip microcomputer STC89C52 be as the platform to achieve the design of CAN bus, introduce in detail the structure and working principle of SJA1000 and PCA82C250, and on basis of it, we design the CAN bus interface, and gives the hardware circuit design and software process of SJA1000 initialization, receiving, sending message. The system can give some subsequent reference for CAN bus application.
