Results 31 to 40 of about 79,068 (332)

An Ultra-Short Baseline Positioning Model Based on Rotating Array & Reusing Elements and Its Error Analysis

Sensors, 2019
The USBL (Ultra-Short Base Line) positioning system is widely used in underwater acoustic positioning systems due to its small size and ease of use. The traditional USBL positioning system is based on ‘slant range and azimuth’.
Jinwu Tong, Xiaosu Xu, Lanhua Hou, Yao Li, Jian Wang, Liang Zhang   +5 more
doaj   +1 more source

Velocity/Position Integration Formula (II): Application to Inertial Navigation Computation

, 2012
Inertial navigation applications are usually referenced to a rotating frame. Consideration of the navigation reference frame rotation in the inertial navigation algorithm design is an important but so far less seriously treated issue, especially for ...
Pan, Xianfei, Wu, Yuanxin
core   +1 more source

Initial Alignment of Large Azimuth Misalignment Angles in SINS Based on Adaptive UPF

Sensors, 2015
The case of large azimuth misalignment angles in a strapdown inertial navigation system (SINS) is analyzed, and a method of using the adaptive UPF for the initial alignment is proposed. The filter is based on the idea of a strong tracking filter; through
Jin Sun, Xiao-Su Xu, Yi-Ting Liu, Tao Zhang, Yao Li   +4 more
doaj   +1 more source

Structural Optimization and MEMS Implementation of the NV Center Phonon Piezoelectric Device

Micromachines, 2022
The nitrogen-vacancy (NV) center of the diamond has attracted widespread attention because of its high sensitivity in quantum precision measurement.
Xiang Shen, Liye Zhao, Fei Ge
doaj   +1 more source

Advancing Wildfire‐Retardant Materials: Engineering Strategies for Direct and Indirect Suppression

Advanced Engineering Materials, EarlyView.
Here, the evolution, ecological impact, and performance of current fire‐retardant materials and suppression strategies are reviewed, offering an engineering perspective to address existing challenges and propose pathways for the development of more effective, scalable, and sustainable solutions to meet the demands of a changing climate. Wildfires cause
Changxin Dong, Samya Sen, Athena Kolli, Stewart G. Wilson, Eric Andrew Appel   +4 more
wiley   +1 more source

Study of the Algorithm of Backtracking Decoupling and Adaptive Extended Kalman Filter Based on the Quaternion Expanded to the State Variable for Underwater Glider Navigation

Sensors, 2014
High accuracy attitude and position determination is very important for underwater gliders. The cross-coupling among three attitude angles (heading angle, pitch angle and roll angle) becomes more serious when pitch or roll motion occurs.
Haoqian Huang, Xiyuan Chen, Zhikai Zhou, Yuan Xu, Caiping Lv   +4 more
doaj   +1 more source

A Comprehensive Review of Additive Manufacturing for Space Applications: Materials, Advances, Challenges, and Future Directions

Advanced Engineering Materials, EarlyView.
Additive manufacturing (AM) transforms space hardware by enabling lightweight, high‐performance, and on‐demand production. This review outlines AM processes—powder bed fusion (PBF), directed energy deposition (DED), binder jetting (BJ), sheet lamination (SL), and material extrusion (ME)—applied to propulsion, satellite structures, and thermal devices ...
Stelios K. Georgantzinos, Eleni Papadopoulou, Grigorios Kostopoulos, Stefanos Voulgaris, Alexandra Tseni, Panteleimon Bakalis, Maria Gkara, Chara C. Mitropoulou, Nikos D. Lagaros   +8 more
wiley   +1 more source

Reconciling the navigational grid with the inertial navigation system [PDF]

IEEE PLANS '88.,Position Location and Navigation Symposium, Record. 'Navigation into the 21st Century'., 2003
It is remarked that the concept of a 'nonchanging north' on the navigation grid overprinted on certain small-scale navigation and planning charts published by the Defense Mapping Agency is remarkably like that encountered in an inertial navigation system with the local-level platform untorqued (alpha-wander mode).
Wanner, L. D., Hopkins, J.
openaire   +2 more sources

Wearable Haptic Feedback Interfaces for Augmenting Human Touch

Advanced Functional Materials, EarlyView.
The wearable haptic feedback interfaces enhance user experience in gaming, social media, biomedical instrumentation, and robotics by generating tactile sensations. This review discusses and categorizes current haptic feedback interfaces into force, thermal, and electrotactile stimulation‐based haptic feedback interfaces, elucidating their current ...
Shubham Patel, Zhoulyu Rao, Maggie Yang, Cunjiang Yu   +3 more
wiley   +1 more source

Hull Deformation Measurement With Large Angles Based on Inertial Sensors

IEEE Access, 2020
The partial reference is used in large ships to measure the hull deformation, which is normally realized through the transfer alignment between the master inertial navigation system and the slave inertial navigation system.
Dongrui Yang, Xiaosu Xu, Yiqing Yao
doaj   +1 more source