Study On Intelligent Control For Plasma Spraying By Robot

Plasma spraying is one of the most important methods in manufacture because the coat is smooth and has good performance in practical use .And because it is easy to implement automatic manipulation, it is widely used in the areas of the repair of accessory, the surface aggrandizement and the functional coat. The technology of robots , one of the three bases of automatism in industry, is also used in plasma spraying. In this article, the author introduce the makeup of the system and how to design a intelligent controller. All this establishes the base of implementation of intelligent control in plasma spraying. All the works list as follows: first ,to improve the integration of the system ,the author select IPC(industry computer) and data acquisition card PCL-818L as the main hardware platform; secondly because arc welding power source has a characteristic of nonlinear, strong interference and coupling in dynamic course, so the author use intelligent technique to regulate the outer character of the power and design a fuzzy controller; the author discussed the main factors which affect the capability of fuzzy controller and attempt to design a self-organized fuzzy controller for power. On software, the author design a effici- ent control program, which is based on OOP(Object Oriented Programming).The program's functions includes: data acquisition, data display, data storage, curve's dynamic display, and the program has a visual integrative interface on data acquisition and switch data control. Also the author design a DC motor speed control using PWM theory to regulate the pace of powder and finish the communication software between PC and SCM. Also, the author design a approximate dynamic model and emulate it in SIMULINK environment and get a good result. To develop the function of the hardware system, the system design a interface used by a plasma spraying robot. And the program actualize the current function of data acquisition and analysis. In the end, the article gives the evaluation of this system and advice for future improvement.