Research And Development On Automatic Straightening Control System For T-shaped Guide Rail

The straightness error of the guide rail is a key factor affecting the safety, comfort level, and moving speed of a transmission system, and it is an important index in the production of guide rail. But limited by technology, production efficiency or financing and other factors, most domestic rail manufacturers still use outdated technology. The straightness error of the guide rail is just measured by eyes, and straightened by manual control. This situation not only restricts the development of the domestic rail manufacturers, but also slows down the pace with international standards.In order to realize the automatic straightening for guide rail, and improve the backward manual measurement and straightening method, the paper put forward a straightening automatic control system especially designed for T-guide rail. And the straightening precision and production efficiency are both improved at the same time.The whole dissertation is divided into six chapters,Chapter one brings out the background of the research, analyze the status of elevator guide rail production technology, and the development of straightening technology. Also the development of servo control system is introduced. In the end, the content and significance of this paper are pointed out.Chapter two shows the design and analysis of the whole processes and structures of the straightening system. And by analyzing the straightening technical, the key parameters in straightening process are given out. Besides, the hardware and software platform of the straightening system are introduced briefly.Chapter three researches on servo control system, and after analyzing the system characteristics, the key parameters are given, also the system control transfer function is carried out. Then the PID-control and fuzzy-control theories are introduced, and a self-learning composite controller is designed, which combines the fuzzy controller and fuzzy-PID controller together. Further more, basing on the system stability analysis, the modeling and simulation of the control system are carried out in the matlab environment.Chapter four gives the design of the mechanical structure and hardware system of the T-guide rail straightening control system. Besides, the work flow of the entire system is detailed introduced, and the hardware control platform of lower computer is set up.Chapter five gives the programming of low computer, including analog input/output module, high-speed counter module, high-speed pulse output module, fuzzy and PID control module, and communication module. Besides, the error of the control system is analyzed.Finally, in Chapter 6, a conclusion is made and the further research work is prospected.