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Star Tracker Geometric Calibration Through Full-State Estimation Including Attitude
Springer Science and Business Media LLC - Tập 23 - Trang 180-191 - 2022
Hyosang Yoon, Kiwook Baeck, Junsung Wi
A star tracker calibration method using star images is presented in this paper. Unlike previous works, the proposed method estimates all parameters and the attitudes at once in a single least-squares formulation for the optimal calibration, which can be easily converted to a recursive estimation form. In addition, this paper presents a method to estimate the overall star tracker performance for at... hiện toàn bộ
Simulation Research on Ice-Breaking Dynamics of Civil Aircraft Flap Mechanism Based on Measured Data
Springer Science and Business Media LLC - - Trang 1-10 - 2023
Binwen Wang, Zhu Cheng, Guoyan Qiang, Jingtao Wu, Zhanpeng Ren
In the alpine environment, the flap movement of civil aircraft is easily affected by frozen ice. At present, there are few experimental data on the adhesion strength of frozen ice that can be used to simulate the ice-breaking load of civil aircraft flaps, and the temperature points do not meet the actual use scenarios. To study the dynamic change law of the flap motion mechanism when breaking ice ... hiện toàn bộ
Formation Control of Multiple UAVs Incorporating Extended State Observer-Based Model Predictive Approach
Springer Science and Business Media LLC - Tập 20 - Trang 953-963 - 2019
Boyang Zhang, Xiuxia Sun, Shuguang Liu, Xiongfeng Deng
This paper studies the extended state observer-based state space predictive control approach to deal with the multiple unmanned aerial vehicle formation flight with unknown disturbances. The distributed control problem for a class of multiple unmanned aerial vehicle systems with reference trajectory tracking and disturbance rejection is formulated. Firstly, a local distributed controller is design... hiện toàn bộ
Preliminary Delta-V Analysis to Deploy a CubeSat Impactor from the Mothership During a Flight Inside the Lunar Sphere of Influence
Springer Science and Business Media LLC - Tập 21 - Trang 277-289 - 2019
Young-Joo Song, Donghun Lee, Ho Jin, Yongjun Song
The current work analyzes the delta-V characteristics to deploy a lunar CubeSat impactor for an early phase feasibility study. The lunar CubeSat impactor is assumed to ride on the mothership and be deployed to hit the lunar surface during a flight inside the lunar sphere of influence (SOI). Different combinations of the periselene approach altitude and velocity for the mothership are considered to... hiện toàn bộ
Estimation Method for Pitching Moment Non-linearities of Cranked Arrow Wing at Low Speed
Springer Science and Business Media LLC - Tập 23 Số 4 - Trang 680-691 - 2022
H. Ishibashi, Taro Imamura, Kenichi Rinoie
Rendezvous Guidance on Circular Path for Fixed-Wing UAV
Springer Science and Business Media LLC - Tập 22 - Trang 129-139 - 2020
Sanghyuk Park
This paper presents a guidance method to enable a fixed-wing UAV to rendezvous with a reference point that moves on a circular path. The guidance law creates a lateral acceleration command based on the phase difference from the moving point and the side-bearing angle with respect to the center of the circle. The stability of the guidance law and the effect of velocity control are provided with lin... hiện toàn bộ
Investigation on the Dynamic Response of a Wide-Chord Fan Blade Under Ground Vortex Ingestion
Springer Science and Business Media LLC - Tập 20 - Trang 405-414 - 2019
Zhonglin Wang, Yong Chen, Hua Ouyang, Anjenq Wang
This paper presents a computational study of the dynamic response of the fan blade owing to the excitations from the ingested ground vortex when the turbofan engine is operating on the ground or during the takeoff run. Firstly a numerical method consisting of static, modal and transient analyses is proposed to investigate the dynamic vibration characteristics of a fan blade model with pre-vibratio... hiện toàn bộ
Aeroservoelastic Characteristics of a Corrugated Morphing Control Surface
Springer Science and Business Media LLC - Tập 23 - Trang 723-733 - 2022
Kensuke Soneda, Natsuki Tsushima, Tomohiro Yokozeki, Taro Imamura
Aeroservoelastic characteristics of a morphing control surface with corrugated structures are investigated in this paper. The finite element structural model and the aerodynamic model with an unsteady vortex lattice method are used to analyze the aeroelastic response of a corrugated morphing control surface. The equation of motion for the corrugated morphing control surface is derived in the state... hiện toàn bộ
Analysis of the IR Signature and Radiative Base Heating from a Supersonic Solid Rocket Exhaust Plume
Springer Science and Business Media LLC - - 2019
Bonchan Gu, Man Young Kim, Seung Wook Baek
Application of Neural Network Based on Real-Time Recursive Learning and Kalman Filter in Flight Data Identification
Springer Science and Business Media LLC - Tập 22 - Trang 1383-1396 - 2021
Yao Li, Haiqing Si, Yitong Zong, Xiaojun Wu, Peihong Zhang, Hongyin Jia, Shuqing Xu, Dayong Tang
The process of obtaining flight data from flight test is complex and costly, which makes it difficult to identify aerodynamic parameters. Therefore, Cessna172 flight simulator was used for flight data extraction, which ensures the convenience, efficiency and economy of the test. To obtain aerodynamic model, based on the idea of machine learning, a recurrent neural network was used to process multi... hiện toàn bộ
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