| Modern industry is toward high-speed, high temperature, high pressure direction, the contradiction between the fatigue damage and the safety of the equipments of modern industry increases prominently. According to statistics, 50% -90% parts of the reasons of the machine destruction is fatigue damage, particularly, in recent decades, with the machinery to high temperature, high speed and direction of the development for large-scale, the mechanical stress increases, the use of the conditions deteriorate, and the fatigue damage accidents is endless. Bending fatigue testing machine is one of the basic instruments, which are used to test material mechanical performances, therefore, the research work related to fatigue in the machinery manufacturing industry has become really important.At present, the load field of most of the fatigue testing machine is mainly rely on manual loading, this way is very inconvenient, imprecise and easily lead to errors. The main task of this research project is to use electro-hydraulic servo control method, then develop a set of control system for loading of bending fatigue test machine base on ARM microprocessor. The research work of the dissertation include mainly as follows:1. Analyse the principle of the bending fatigue test machine dynamic loading control system, and design the overall plan.2. According the overall design program, create the system mathematical model, and simplified the mathematical model then calibrate it by PID.3. Design Fuzzy-PID controller theory based on the Fuzzy-PID control method.4. Design the main controller based on 32-bit ARM microprocessor (LPC2292), realized the circuit design of measurement module5. Transplant real-time embedded systemμC / OS?II into LPC2292 and write the start code and main code, then design user application procedures for task module.6. This subject fulfilled the debugging work of hardware and software for the measurement and control system.7. Finally, simulate by the MATLAB/Simulink. |
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