Abstract
An approach was given to estimating straightnesserror curve using identification technique and Kalman filter in a previous short paper. This approach can compensate accidental errors which are mixed to the measuring values from displacement sensors when a serial three point method is used. In this paper, the following facts are revealed by simulation and some experiments. (a) This approach is a match in measuring accuracy for a serial multi-point method which uses four displacement sensors. (b) This approach is superior in accuracy and repeatability to a serial three point method. (c) This approach shortens the computer processing time to 1/10 comparing with a serial multi-point method.
