Experimental Design and Its Posterior Efficiency for the Calibration of Wearable Sensors

Abstract

This paper investigates experimental design (DoE) for the calibration of the triaxial accelerome-ters embedded in a wearable micro Inertial Measurement Unit (μ-IMU). Firstly, a new lineariza-tion strategy is proposed for the accelerometer model associated with the so-called autocalibra-tion scheme. Then, an effective Icosahedron design is developed, which can achieve both D-opti-mality and G-optimality for linearized accelerometer model in ideal experimental settings. How-ever, due to various technical limitations, it is often infeasible for the users of wearable sensors to fully implement the proposed experimental scheme. To assess the efficiency of each individual experiment, an index is given in terms of desired experimental characteristic. The proposed expe-rimental scheme has been applied for the autocalibration of a newly developed μ-IMU.