The Design Of Electronic Let-of And Electronic Take-up Control System Based On Adaptive Algorithm

In recent years, the new modern jet loom is the model with the fastest developing speed in loom with no shuttle. Its efficiency, automatic monitoring level, product quality and the adaptability all have been greatly improved. As one of the important components on jet looms, high-performance ELO and ETU control system is the development direction of advanced looms.The research and development of ELO and ETU control system have great significance in narrowing the gap between local and similar foreign looms to meet the increasing domestic market demand. Therefore, this paper mainly finished the following contents:The first chapter is an introduction. It not only overviews the ELO and ETU system and analyses the mechanism features of ELO and ETU, but also points out the current situation and development tendency of ELO and ETU system at home and abroad.The second chapter analyses the warp tension in weaving process. It expounds the effects of loom opening, beating up, wrap let-off and take-up on warp tension and its compensating method. Moreover, the generation and collection of signals for warp tension are described in detail.The third chapter is adaptive control algorithm for wrap tension. The adaptive controller was designed according to single neuron adaptive control algorithm. Meanwhile, the control effects were compared between single neuron adaptive control algorithm and conventional PID algorithm by simulation. The results showed that the single neuron adaptive control has better attenuation performance for external disturbance. It also verified the feasibility of single neuron adaptive controller.The fourth chapter is the design of control system for ELO and ETU. It consisted of two parts, hardware design and software design. The hardware design mainly includes control module, test module and servo drive module while the software design introduced the design framework and analyzed the design methods, together with their function for certain software.The fifth chapter is the debugging of control system. The jet loom RFJA10 was changed to be the platform of debugging for the bench test. The experimental data showed that the control effect of this controller is good enough to meet the requirement and the dynamic property and stability of tension control system are improved. The sixth chapter is Summary and prospects. The research contents and results are summarized, and the future work is prospected.