Research On Error Separating And Tracing Of Dynamic Measurement

Error decomposition and traction is to decompose the measuring errors of the dynamic systems into the component errors and trace to their sources, i.e. the units within the measurement system. This is one of the important issues in development of error theory.Error of dynamic measurement is a nonstationary signal comprising several components. Because of the complexity of its components, many methods of signal processing are needed to analyze the dynamic error. This paper analyzes the theory of several methods of signal processing and the application in nonstationary signal processing. With this understanding, the method and process of dynamic error decomposition is introduced. A simple simulation system shows the practicability of this method. Also, the good effect is gained applying this method to Coordinate Measuring Machine.This paper designs a acquisition system of dynamic errors for grating-measurer. The Hewlett Packard 5529A laser interferometer performs dynamic errors calibration. Such method uses the A-quad-B pulses as the position trigger signals. The software package of the HP laser interferometer permits the data acquisition and presentation of the dynamic errors in accordance with ISO-232 standard, and provides a realistic and detailed picture of the errors synchronously. At last, the dynamic error is decomposed and traced. The characteristic and composition are mastered basically.