Research On Technologies Of Grinding Wheel Balancing Based On DSP

Grinding machine has been widely used in mechanical working, and thegood and bad of its performance determine the final shape and the dimensionalaccuracy of the part it produces, and directly affect the working performance ofthe part. It is found that the vibration of the rotor is caused by the unbalance of itat70~80%of the probability. Hence, it is necessary to research and develop a setof balancing instrument which is practical, economic and high accuracy. Thispaper researches and develops a set of balancing instrument. When measuring theunbalance, we compensate the unbalance by adding masses, and make the rotorbalance again.Because the nicety measuring the vibration signal is the key of the balanceaccuracy, this paper analysises the vibration signal in time and frequency domain.In time domain uses Wavelet Analysis on the vibration signal, chooses motherwavelet and threshold by MATLAB simulation analysis, and denoise the signal;In frequency domain using FFT to calculate the amplitude and phase of the signalby simulation, which for extracting the amplitude and phase of the signal pay theway.This paper designs a set of balancing instrument, choosing TI corp.’sTMS320LF2407A as the core chip of the system, which lower the wholeinstument cost. DSP has the feature of good at calculation and suitable for FFT.Then we finish the hardware and software design, hardware includes measureinstrument, signal processing circuit design and LCD module. Software includestime and frequency balancing program, singal plane balancing program. Thispaper has finished the balancing experiment on a grinding wheel, the resultshows it can balance well, and we give the phase accuracy method.