mechanical Engineering, Nanchang Institute of Technology
This paper presents a magnetostrictive in-pipe impact drive mechanism (IDM). To estimate the output performances of the IDM, a dynamics model was developed based on the magnetostrictive material constitutive model and mechanical model of the IDM. Therefore, an experimental system has been built to test the motion performance of IDM. Simulation and experimental results illustrate that the proposed model can accurately predict the step-size of the IDM. The working frequency of the designed IDM is from 10 to 120 Hz, with a the step-size resolution of 740 nm. The magnetostrictive IDM performs good linearity, and can be applied to precision positioning.