The main aim of this paper was to prove the effectiveness ofthe calibration approach, which does not need to use precise positioningdevices and thus is not expensive and time-consuming.These characteristics are the main benefits of the proposed approach.Based on Levenberg–Marquardt (LM) and Thin-Shell(TS) algorithms we evaluated sensor error models (SEMs) foraccelerometers of AHRS M3, ADIS16405, CXL02LF3 unitsand compared them with ones obtained from a Matlab fminuncfunction, which was used as a reference. We provided variousanalyses to show different aspects of the calibration such