The invention provides a soft measurement method and a soft measurement
system of tool
nose point displacement mobility of a
machining center, and belongs to the technical field of
vibration measurement. Experimentation testing is combined with finite
element analysis to conduct the soft measurement of the tool
nose point displacement mobility on tools which are arranged in the
machining center and have different geometrical characteristics. According to the soft measurement method and the soft measurement
system of the tool
nose point displacement mobility of the
machining center, direct testing of p2b2b and n2b2b is avoided, instead, the p2b2b and the n2b2b are solved through testing of H11 and H12, H11 and H12 are values which are easier to test, times of experimental tests are reduced, the tool nose point displacement mobility of all tools in a machining center tool
magazine can be theoretically forecasted through a plurality of times of tests after the tools are installed, the test cost and test expenses are greatly reduced, no accurate modeling needs to be conducted on main shaft-tool
handle, forecasted result incredibility caused by errors in a modeling process and errors in a parameter identification process is avoided, and maneuverability is strong when the soft measurement method and the soft measurement
system of the tool nose point displacement mobility of the machining center are applied to
engineering. According to the soft measurement method and the soft measurement system of the tool nose point displacement mobility of the machining center, a plurality of times of theoretical prediction can be conducted after one test, obtained tool nose point displacement mobility is the basis for forecasting
flutter, and milling machining
flutter forecasting can be conducted.