| Torsional dynamic stiffness is a significant factor which can affect the performance of the transmission system. However, the existing dynamic stiffness testers have problems with low dynamic loading frequency, low precision, and poor generality. In this thesis, the measure and control system for the test instrument of torsional dynamic stiffness is taken as the research object. The measure and control system consists of two subsystems: the torque loading system and the test software system. A high-performance measure and control system is developed successfully in this thesis.In order to develop the control algorithm for the torque loading system, the mathematical model of the torque loading system is developed. The mathematical model can help to study the following feature and the ability of anti-interference of the torque loading system. The PID control algorithm is adopted in the system to improve the following feature and high speed responsiveness. In order to improve the ability of anti-interference, the system uses fuzzy PID control algorithm. Finally, the control simulation experiment of the loading system was carried out. The results show that the fuzzy PID control algorithm can meet the control accuracy and it also make the system have a better ability of anti-interference.In order to develop the test software system, the test software is developed based on the principle of torsional dynamic stiffness test. The test software can capture, save and display the data during the test process. The real-time performance of the test software is very important through the analysis of the test process, which needs real-time closed-loop control and real-time data acquisition. The software system was designed in Windows XP based on the common used ?C/OS? ? real-time operation system. The software can play a guidance role in the development of the real-time measure and control system in other fields. |
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