Rearch On Dynamic Parameters And Model Establishment Of Machine

With the economy rate growing rapidly in China, high speed machining technology has been required widely to improve productivity. However, the machining feedrate of the complex contour is changed so discontinuously that the dynamic characteristics of the machine tool would probably be changed correspondingly. The large machine error would be caused. So it is important to improve the machining quality with high speed and high precision.In this thesis, the volecity and acceleration factors of the machine dynamics which affect the position error are discussed. Models of machine dynamics are analyzied. The dynamic mathematic models are discussed and studied for real-time error control. The system experiments are set up with the DSP platform. The research work is given as follows:Firstly, the character of structure connection parts and the vibration of screw are studied in the thesis. The dynamic parameters are analyzed. The models and their solution are given. The identifying methods are also discussed in the thesis. Then the dynamic models are put forward by the langrange method.Secondly, the schemes of identification and regulation are designed on DSP. Also the expound numeral method is provided to solve parameter equations. Data acquisition and process system are realized.Furthermore, the experiment results are given by MATLAB simulation models and on-line computer-controlled system. The results show the correctness of the dynamic model.Finally, the position controller is designed with full state feedback law. The simulation results show that the control system has the good dynamic response performances for the input vibration signals.