Quaternion-Based Local Frame Alignment between an Inertial Measurement Unit and a Motion Capture System.

ABSTRACT: Local frame alignment between an inertial measurement unit (IMU) system and an optical motion capture system (MCS) is necessary to combine the two systems for motion analysis and to validate the accuracy of IMU-based motion data by using references obtained through the MCS. In this study, we propose a new quaternion-based local frame alignment method where equations of angular velocity transformation are used to determine the frame alignment orientation in the form of quaternion. The performance of the proposed method was compared with those of three other methods by using data with different angular velocities, noises, and alignment orientations. Furthermore, the effects of the following three factors on the estimation performance were investigated for the first time: (i) transformation c

SUBMITTER: Lee JK 

PROVIDER: S-EPMC6263645 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature