title: Dual MIMU Pedestrian Navigation by Inequality Constraint Kalman Filtering.
abstract: The foot-mounted inertial navigation system is an important method of pedestrian navigation as it, in principle, does not rely any external assistance. A real-time range decomposition constraint method is proposed in this paper to combine the information of dual foot-mounted inertial navigation systems. It is well known that low-cost inertial pedestrian navigation aided with both ZUPT (zero velocity update) and the range decomposition constraint performs better than those in their own respective methods. This paper recommends that the separation distance between the position estimates of the two foot-mounted inertial navigation systems be restricted by an ellipsoidal constraint that relates to the maximum step length and the leg height. The performance of the proposed method is studied by utilizing experimental data, and the results indicate that the method can effectively correct the dual navigation systems' position over the traditional spherical constraint.
authors.affiliation: School of Aeronautics and Astronautics, Central South University, Changsha 410083, China. ahshw@csu.edu.cn.
authors.forename: Wei
authors.initials: W
authors.lastname: Shi
authors.affiliation: School of Aeronautics and Astronautics, Central South University, Changsha 410083, China. sunshineofking@163.com.
authors.forename: Yang
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Shanghai Key Laboratory of Navigation and Location based Services, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. yuanxin.wu@sjtu.edu.cn.
authors.forename: Yuanxin
authors.initials: Y
authors.lastname: Wu
keywords: ZUPT; correct position; ellipsoidal constraint; inertial navigation system