大型快锻液压机Takagi-Sugeno模糊系统设计

Takagi-Sugeno fuzzy system design of large fast forging hydraulic press

利用ITI-SimulationX软件建立了大型快锻液压机本体和主控系统的精确仿真模型,进行了三维本体与一维系统的集成仿真,结果表明:液压机热态锻造精度达到§1 mm,最高锻造频次达85次/min;针对大型快锻液压机工艺范围广、工况复杂的特点,利用MATLAB/Simulink软件设计了Takagi-Sugeno模糊控制器,以主控系统锻造行程、锻透深度、最大工作压力、工作缸数量和主泵数量作为输入变量,高频响比例阀启闭曲线作为输出变量,依据主控系统仿真结果确定模糊推理规则,通过ITI-SimulationX与MATLAB/Simulink软件协同仿真接口模块实现了对主控系统的智能控制,使液压机在各种工艺参数下,均能达到较高锻造精度和较快响应速度,更好地适应了大型快锻液压机的生产工艺需求.

The exact simulation model of the body and the main control system of a large fast forging hydraulic press is built by using the ITI-SimulationX software. The integrated simulation of the three-dimensional body and the onedimensional system is performed. The results show that fast forging hydraulic press can attain the forging precision of ±1mm and the maximum forging frequency of 85 strokes/min during hot forging. For a large fast forging hydraulic press, which has wide process range and complicated operating conditions, we design the Takagi-Sugeno fuzzy controller which includes the forging stroke, forging penetration, maximum working pressure, working hydraulic cylinder number and the number of main pumps as input variables, and the open-close curve of the high-frequency-response proportional valve as output variable. Fuzzy reasoning rules are deduced from simulation results of the main control system by using MATLAB/Simulink software. The intelligent control for the main control system is realized by using the co-simulation interface modules of ITI-SimulationX and MATLAB/Simulink, providing high forging precision and fast response speed under different technological parameters and accommodating to various process requirements for large fast forging hydraulic press.