Fang Xu

Design and Implement of Franking Machine Control System Based on ARM

This paper presents the design and implementation of franking machine control system using an embedded microcontroller. An ARM9 microcontroller and embedded real-time operating system RTAI-Linux were employed to implement the machine control and postage management. The implementation methodologies for embedded control system and franking mechatronic drive were studied. The test results show that the machine franks mail items in high performance and better reliability.

Electronic drive control in a rapier loom

Electronic and computer techniques, together with individual servomechanisms, were used successfully in this study to develop the electronic weft selection, electronic let-off and electronic take-up motion systems of the rapier loom. The control system configuration, operating principle, and mathematical models of electronic drives system were analyzed. The synchronization among all mechanical motions, and an improved algorithm for the warp let-off tension control were discussed. The study indicates that constant warp tension is guaranteed as the diameter of the warp beam goes from full to empty. Also, the required weft density is obtained by the electronic box, and the flexibility, reliability and properties of the rapier loom are improved.