You can clean up a set of test data before calibration by repairing it to reduce noise, decimating it, shifting its origin to correct for slack or preloading conditions, smooth the curve, and removing any outliers.
Smoothing Test Data Inserting a New Data Point in a Test Data Set Deleting Individual Outliers from Test Data Specifying Critical Points in a Test Data Set Shifting Test Data Decimating Test Data Regularizing a Test Data Set Repairing Test Data Generating a Time History from a Set of Frequency Domain Test Data