Application of embedded soft PLC in the control system of rapier loom

At present, the rapier loom has gradually become the mainstream equipment in the manufacturing industry. In order to make the rapier loom realize automated production and further improve the production efficiency of the rapier loom, improve the programmability of the system, and reduce the cost of system maintenance. The thesis developed a rapier loom control system based on embedded soft PLC, and carried out experiments and applications in the field. The contribution and innovation of this paper is to develop a complete low-cost control system, and through a genetic algorithm optimized PID algorithm to complete the more effective control of the loom tension system. The embedded soft PLC system proposed in this paper reduces the overall maintenance cost of the system and improves the programmability of the system. This text carries on the systematic scheme design to the embedded soft PLC from the hardware system and the software system respectively. First, according to the actual requirements, this article designs the overall scheme of the embedded software PLC hardware system with STM32F407ZGT6 as the core. Then this article is based on the embedded soft PLC hardware platform, according to the international standard of industrial control programming, writes the embedded soft PLC low-level driver software. Secondly, this article analyzes the factors that affect the warp tension during the operation of the rapier loom, and proposes the use of genetic algorithm to optimize the warp tension control method of the traditional PID algorithm. Finally, we conducted verification tests and on-site application debugging for the entire set of rapier loom embedded soft PLC control system. We controlled the warp tension as the main experimental object. The results show that this control system effectively improves the control accuracy of the warp tension of the rapier loom and meets the actual needs of industrial applications. The whole system has a good application prospect in the warp tension control of rapier looms.

Automatic Control and Simulation of an Overhead Crane’s Travel System

A low level of automation, low accuracy of control, and high dependence on operator proficiency are general deficiencies of traditional overhead cranes. In order to improve the level of automation of overhead cranes, genetic algorithms and the grid method were applied to plan the global path of an overhead crane in a static environment. An automatic travel control system for an overhead crane was designed on the soft PLC platform CoDeSys. A slip control variable frequency regulating system was used to guarantee the accuracy of the travel system. A Simulink model of the slip control variable frequency regulating system was built with parameters optimized, and the control signal generated by the PLC was input into the model to conduct the simulation, which verified the feasibility of automation and the accuracy of the control system.