A5100448161- Inertial Sensor and Navigation
- Space Satellite Systems and Control
- Target Tracking and Data Fusion in Sensor Networks
- Geophysics and Gravity Measurements
- Spacecraft Dynamics and Control
- Adaptive Control of Nonlinear Systems
- Astro and Planetary Science
- Astronomical Observations and Instrumentation
- Advanced Measurement and Detection Methods
- GNSS positioning and interference
- Control and Dynamics of Mobile Robots
- Guidance and Control Systems
- Hydrogen embrittlement and corrosion behaviors in metals
- Advanced Research in Science and Engineering
- Magnetic Field Sensors Techniques
- Heavy Metal Exposure and Toxicity
- Near-Field Optical Microscopy
- Radio Astronomy Observations and Technology
- Magnetic Bearings and Levitation Dynamics
- Microfluidic and Bio-sensing Technologies
- Extremum Seeking Control Systems
- Ophthalmology and Visual Impairment Studies
- Calibration and Measurement Techniques
- Corrosion Behavior and Inhibition
- Orbital Angular Momentum in Optics
Central South University
2024
The Third People's Hospital of Dalian City
2024
Dalian Municipal Central Hospital
2024
China Astronaut Research and Training Center
2016-2023
China XD Group (China)
2019-2020
National University of Defense Technology
2011-2016
Jiamusi University
2016
China Meteorological Administration
2007
Nanjing University of Posts and Telecommunications
2006
The space noncooperative target maneuvering trajectory tracking is essential for the safety of on-orbit spacecraft. For target, model complex and changeable. Besides, dynamics model, operation time, frequency are previously unknown. It difficult to achieve high-precision tracking. In this paper, a novel real-time algorithm developed, in which discretized first, then differential algebra method utilized estimate parameter time. Since period very short, parameters next time assumed be same as...
No AccessEngineering NoteKalman Filtering for Relative Spacecraft Attitude and Position Estimation: A RevisitLijun Zhang, Huabo Yang, Shifeng Hong Cai Shan QianLijun ZhangDepartment of Astronautics Science Engineering, National University Defense Technology, 410073 Changsha, People's Republic China, YangDepartment CaiDepartment China QianState Key Laboratory Astronautic Dynamics, Xi'an Satellite Control Center, 710043 Xi'an, ChinaPublished Online:11 Sep...
This paper presents a new robust design for the longitudinal autopilot of tail-controlled, skid-to-turn missile based on equivalent-input-disturbance (EID) and generalized extended state observer (GESO) approach. Firstly, nonlinear dynamics is modeled as linear formulation angle-of-attack tracking with uncertainties disturbances. Next, method, EID-GESO-based control proposed disturbance rejection. The method regards disturbances lumped disturbance, named EID, simultaneously attenuates it...
In this paper, the relative navigation technique of final approach phase for a tumbling target spacecraft is studied and exploited. It assumed that in failure or out control there no good priori rotation rate information. The Euler’s rotational dynamics used to propagate angular velocity, unknown inertia parameter circumstance also considered. chaser equipped with three strapdown gyros accelerometers star sensor determine absolute motion parameters, an optical camera measures azimuth...
A novel relative spacecraft attitude and position estimation approach based on an Unscented Kalman Filter (UKF) is derived. The integrated sensor suite comprises the gyro sensors each a vision-based navigation system slave spacecraft. In traditional algorithm, assumption that master's body frame coincides with its Local Vertical Horizontal (LVLH) made to construct line-of-sight observations for convenience. To solve this problem, two quaternions map LVLH master frames are involved. general...
地磁导航是无源自主导航技术研究的新方向. 分析了地磁导航的基本原理, 描述了典型磁暴过程, 并针对地磁导航在磁暴环境中的适用性进行了研究. 在采用曲面样条方法对实测地磁场数据建立观测模型的基础上, 结合广义卡尔曼滤波方法讨论了磁暴不同阶段对地磁导航精度造成的影响. 分别采用理论典型磁暴数据以及实测磁暴数据进行仿真, 仿真结果表明, 在磁暴的初相、恢复相的中后时段以及中等强度以下的磁暴全过程仍然可以采用地磁来进行导航定位, 导航精度在200 m以内, 满足飞行器中程制导的精度要求.
Introduction: Bolt loosening detection plays a crucial role in ensuring structural safety. Existing research using deep learning methods has the drawback of being applicable to limited scenarios and typically requires at least two frames images for comparison subsequent angle detection, with range detectable angles. Method: In this study, color segmentation method was first used separate red square gasket placed between bolt base, thereby locating area; then, image perspective-corrected four...
Introduction This study aimed to compare the consistency of pupil offset measurements obtained using Pentacam, Keratron Scout, and Sirius devices. Methods retrospective cross-sectional included 146 young myopic individuals (292 eyes) scheduled for refractive surgery at Dalian Third People’s Hospital between January 2023 December 2023. Three devices were utilized measure chord mu deviation along with Cartesian distances X Y coordinates (Px, Py) associated offset. Repeated-measures analysis...
In this paper, we describe the methodology and field experimentations of measuring Gobi surface emissivity using CE312 infragold board at Dunhuang radiometric calibration site China. The radiance land were measured by CE312, calculated emissivity. Then performed atmospheric correction including gas absorption path which with radiative transfer code MODTRAN 4.0; predict satellite sensor entrance pupil. Inversion TOA brightness temperature satellites compared temperature, obtained from...
In this paper, a federated nonlinear predictive filter is derived for the gyroless attitude determination system with multiple sensors (e.g., star sensor, sun sensors, GPS sensor). The features of approach include filtering algorithm to determine from dynamic model spacecraft without rate gyros and process measurement information sensors. equivalence relation between Kalman demonstrated structure estimation criterion. combines good qualities both filter. Simulation results using indicate...
In this paper, both the proportional derivative feedback control and variable-structure sliding mode approaches based on dual numbers are presented to design space flyaround in-orbit inspection missions. Dual-number-based spacecraft kinematics dynamics models formulated. The integrated translational rotational motions can be described in one compact expression, mutual coupling effect considered. A mission model is derived. Both laws designed using numbers. Simulation results indicate that...
We propose a new and versatile way for optical orbital rotation of microscopic sized multi-particle arrays in transversely misaligned dual-fiber trap. A PDMS(Polydimethylsiloxane) chip is designed to adjust the transverse offset distance between two fibers. It possible control frequency perimeter by varying without external influences. Experimental results show that there threshold value, beyond which particles will rotate certain trajectory. The values required initiate was found be...