The Research And Application Of Fuzzy Adaptive Constant Pressure Abrasive Belt Grinding Technologies For Large-scale Complex Plates

With the rapid growth of industrial processes toward large size, continuous and complex, the control effect of many systems can't be satisfied when using the conventional control. Similarly, parallelism of the surface of large composite plates are very poor after connecting by explosion, even it's have different degrees of warpage after correction, so that the surface of the composite plates are like the wavy. Using the traditional control of surface grinding, the grinding head can not be better to follow the changes of the workpiece's surface, the phenomenon of uneven grinding is appeared very easy. so the quality of the surface of workpiece is poor, which has failed to meet the actual requirements. In addition, the traditional control methods often need to establish accurate mathematical model of controlled object, which in the actual production process is very difficult to do.In order to effectively solve the problems of abrasive tools change with plate surface, constant pressure contact with workpiece to control grinding depth and grinding not enough or grinding too depth in some position, raising the surface grinding quality. In the paper, many advantages are incorporated of abrasive belt grinding and fuzzy adaptive control, the research and application of fuzzy adaptive constant pressure abrasive belt grinding technologies for large-scale complex plates were studied on the basis of referencing a lot of related literatures home and abroad .Main research contents and conclusions are as follows:①Problems of the large-scale composite plants by the grinding have been analyzed. Algorithm strategy of flat belt grinding machine control system has been studied in accordance with abrasive belt grinding machine control characteristics and the present treatment methods commonly used. The necessity and feasibility of fuzzy adaptive control algorithm system was given.②According to the requirements of flat grinding machine and control system, the controlled object is researched, and at the same time, the mathematical model of the system is treated, and then it's processed simplify and engineering.③According to the control characteristics of flat grinding machine, the fuzzy control rules and control algorithms are proposed. The method of fuzzy is analysized, and the fuzzy control rules are optimized, in order to ensure the control system has a good real time. ④Fuzzy adaptive controller of large-scaled flat belt grinding is designed, the method of fuzzy and fuzzy control rule table are established. The control rule table is looked up directly based on the error E and error change EC, and then the single chip is used to ensure the control system to grind with constant pressure. And the MATLAB simulation is used to observe and analyze the following, stability and robustness of fuzzy adaptive control system of flat belt grinding machine.⑤Test equipment is analyzed and designed, and the test platform of fuzzy adaptive control with constant pressure of large flat belt grinding machine was set up.