A5100401337- Space Satellite Systems and Control
- Spacecraft Dynamics and Control
- Astro and Planetary Science
- GNSS positioning and interference
- Inertial Sensor and Navigation
- Combustion and Detonation Processes
- Aluminum Alloy Microstructure Properties
- Advanced Frequency and Time Standards
- Guidance and Control Systems
- Advanced SAR Imaging Techniques
- Aluminum Alloys Composites Properties
- Radar Systems and Signal Processing
- Radio Wave Propagation Studies
- Military Defense Systems Analysis
- Geophysics and Gravity Measurements
- Adaptive Control of Nonlinear Systems
- Ionosphere and magnetosphere dynamics
- Satellite Communication Systems
- Fire dynamics and safety research
- Combustion and flame dynamics
- Military Strategy and Technology
- Fluid Dynamics Simulations and Interactions
- Anodic Oxide Films and Nanostructures
- Target Tracking and Data Fusion in Sensor Networks
- Spacecraft and Cryogenic Technologies
China Academy of Launch Vehicle Technology
2018-2025
China Astronaut Research and Training Center
2018-2024
PLA Air Force Aviation University
2020-2023
China Ocean Shipping (China)
2023
China North Industries Group Corporation (China)
2023
Nanjing University of Science and Technology
2023
Qingdao National Laboratory for Marine Science and Technology
2022
Space Engineering University
2019
Lanzhou University of Technology
2018
Beihang University
2012
The rotating detonation engine (RDE) fueled by coal powder has attracted much attention because of its high thermal cycle efficiency. To explore the characteristics anthracite and further study effects particle size morphology on them, a series experiments with were carried out in disk-shaped combustor. experimental results show that particles plays an important role detonation. addition porous (PA) enhances intensity lean hydrogen–air, while flaky (FA) weakens it. concentration rise PA...
Multiple unmanned aerial vehicle (UAV) collaboration has great potential. To increase the intelligence and environmental adaptability of multi-UAV control, we study application deep reinforcement learning algorithms in field cooperative control. Aiming at problem a non-stationary environment caused by change agent strategy multi-agent environment, paper presents an improved multiagent algorithm—the joint proximal policy optimization (MAJPPO) algorithm with centralized decentralized...
The traditional dynamic weapon target assignment model is a combination of multiple static stages. the next stage carried out after result previous settled. However, between two stages, threat ranking targets may change with time, and does not take this time issue into consideration. This paper proposes "time sampling model". divides decision-making by setting interval data collection, it can capture real-time changes in degree make timely decisions. With model, study designed method based...
A detailed understanding of space objects is one the important goals situational awareness. The geostationary orbit (GEO) belt an asset for human beings, so identification GEO satellites measures to ensure safety (GEOs). In this paper, we propose using deep learning based on recurrent neural networks (RNNs) and convolutional (CNNs), multiple Kernel (MKL) identify shape attitude GEOs synchronously via light curves. Our algorithm focuses mainly optical data obtained from real measured...
Electrodynamic tether technology is a novel way to perform spacecraft orbital transfers. This paper focuses on bare electrodynamic (BEDT) system and evaluates its transfer performance mission applicability. A nonsingular dynamic model of the BEDT developed. In particular, ambient perturbation forces, including atmospheric drag Earth oblateness effect, are taken into account. Numerical simulations then performed investigate under various parameters involving initial altitude, inclination,...
Doppler velocity log (DVL) errors affect the accuracy of strapdown inertial-navigation system (SINS)/DVL integrated navigation. Most existing calibration methods do not consider problem DVL sampling frequencies that are fixed, and they cannot cope with large misalignment angles. This study proposes a method to calibrate internal external simultaneously, based on genetic algorithm. To solve asynchronous SINS sampling, for unifying time reference using cubic-spline interpolation is proposed....
Abstract This study introduces the third-generation BeiDou Navigation Satellite System (BDS-3) system’s creative global operation and service architecture based on regional stations Ka-band inter-satellite links (ISLs). The architecture’s contributions to BDS-3 include not only combined orbit determination time synchronization but also autonomous synchronization, operations services. on-orbit results are being presented in paper verify designed capabilities. Compared with BDS-2, accuracy is...
This study handles the control problem of orbit injection phase for a launcher. By doing so, coupled position and attitude dynamics launcher is firstly formulated. A partial integrated guidance (IGC) scheme then proposed based on backstepping philosophy. On one hand, since error sub-dynamics possesses to be two-order fully-actuated nonlinear system, parametric design technique utilized construct command thrust vector by using high-order fully actuated system theory. other torque designed...
Be directed against the problem that radio signals are susceptible to ionospheric delay interference, BDS measurement information and ephemeris read through MATLAB, over sea area where Spacecraft TT&C ship works is inversed. The results show there a signal of several nanoseconds tens nanoseconds, it found changes with time (day, night, season) space (longitude latitude).
To fulfill the practical demands of airborne equipment’s miniaturization and integration, topic around single antenna radar altimeter become one hot topic. But problem leakage signal greatly limits its applied scope. solve this problem, first，carry out qualitative analysis on altimeter; secondly, apply Reflected Power Canceller (RPC) to receiver system, then propose optimal design; afterwards, implement theoretical echo finally, simulation cancellation performance is carried out, results...
As a kind of refining agent, Al-Ti-C-Ce intermediate alloy is widely used in the field nonferrous smelting. The effect contents on microstructure and properties Al-Cu-Mn was studied by OM, SEM, EDS other test methods. results show that as-cast obviously refined after adding 0.1% Al-Ti-C-Ce, θ phase characterized with shape point or strip. With increase addition amounts, parts grains coarsened. When amount reached to 0.3%, refinement further reduced, number intergranular precipitates TiC...