Research On Improving Calibration Accuracy Of SE03Automatic Rotor Dynamic Balancer

With the increase of requirements and demand for the high performance motor inall walks of life, higher demand for the rotor dynamic balance of motor is also putforward by the manufacturers. Therefore, the study of that how to improve thecalibration precision of the automatic dynamic balancing equipment is very important.On the basis of the graduation design during the period of undergraduate, research onthe measures to improve the calibration accuracy is done in this paper. The object of thisresearch is to improve the calibration accuracy of automatic dynamic balancingequipment SE03from the aspects of measurement accuracy and de-weight accuracy.In the aspect of measurement, the sensitive element, the conversion element andconverting circuit are deeply studied. According to the principle of dynamic balancemeasurement, dynamic balancing measuring system model is built to analyze principleerror, and the methods to reduce the error are given out. In details, the influence of therotor speed fluctuation is focused. To realize the integral period and equiphase signalsamples, the sampling strategy.is optimized. In order to reduce the influence of thedisturbance of signal, the design to extract the signal of dynamic balance of filter circuitis presented. From the simulation in MATLAB, the filter turn out to be good frequencyselection characteristic, in other words, the unbalanced signal can be effectivelyextracted with this filter. The effect of AD conversion accuracy on measure accuracy iscalculated, and the solution to reduce the quantization error is put forward.In de-weight aspect, establish the model of depth-control v-shaped correct strategy.Simplify the calculation of cutting depth. Give out the decomposition algorithm ofunbalance. The influence of the cutter error and rotor position error to the de-weightprecision is taken attention synthetically. And research on the method to improve theknife rotor position precision.As a result, the de-weight accuracy is improved.In test and verify aspect, the integrated performance tests on both optimized andunoptimized dynamic machine are finished. The tests cover the minimum of residualunbalance, lopsided loss and the cutting model validation. Test results show that theaccuracy of the measurement is greatly improved. The actual reducing weight isconsistent with the theoretical curve, reaches to re-balancing accuracy requirements.