Institute of Navigation

Influence of liquid film in star wheel tip clearance on dynamic characteristics of single screw compressor

The liquid film in the tooth tip clearance plays a critical role in reducing wear and sealing gas leakage in a single-screw compressor, yet its influence on shaft system dynamics has not been systematically quantified. In this paper, a comprehensive mathematical model of the liqu...

Embedded Cardiorespiratory Monitoring Using a 77 GHz FMCW Radar: On-Chip Multi-Timescale Tiny 1D CNN and Whole-Node Power Evaluation

A 77-GHz radar can detect small chest movements induced by cardiac activity and respiration; however, typical systems transmit the acquired signals to an external computer for processing. This limits the development of autonomous and energy-efficient monitoring devices. This stud...

Learning to sail without wind information: reinforcement learning-based control for unmanned sailing vessels under partial observability

Unmanned sailing vessels commonly rely on real-time wind-field measurements as key inputs for multi-level decision-making, including path planning and control. During long-endurance offshore missions, however, wind-sensing systems may be affected by harsh environmental conditions...

Odometry and Mapping for Complex Environment Perception Under Partial-View Sensing

Dense partial-view LiDAR observations are attractive for outdoor perception, but limited overlap and viewpoint sensitivity make odometry and mapping less reliable than with spinning LiDARs. Many recent algorithms for this sensing regime are built as LiDAR-inertial odometry framew...

Goal-directed synergistic fusion navigation for robust localization under cross-scenario spatial uncertainty

Abstract A goal-directed synergistic fusion navigation framework is essential for enabling accurate and reliable navigation of autonomous unmanned systems across diverse operational scenario environments, especially under challenging conditions such as Global Navigation Satellite...