Article
Engineering, Aerospace
Zerun Zhu, Xiaowei Tang, Chen Chen, Fangyu Peng, Rong Yan, Lin Zhou, Zepeng Li, Jiawei Wu
Summary: This paper summarizes the theories and technologies related to robotic milling of complex parts, focusing on machining process planning and control techniques, as well as the principles of robot stiffness characteristics, dynamic characteristics, chatter mechanisms, and deformation mechanisms. By reviewing the latest research progress and achievements, the aim is to promote the application of related theories and technologies in high efficiency and precision intelligent milling.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Engineering, Aerospace
Andrew Sandberg, Timothy Sands
Summary: This paper introduces the optimization methods for spacecraft slew trajectories. By comparing sinusoidal functions and Pontryagin's method, it is found that Pontryagin's method results in lower control effort. Analysis of the simulated system response demonstrates the necessity of understanding the effect of cross-coupling on control costs reduction. The use of calculated trajectories greatly reduces control costs and improves the accuracy of spacecraft maneuvering.
Article
Engineering, Aerospace
Junpeng Shi, Zai Yang, Yongxiang Liu
Summary: This article investigates the parameter identifiability issue in angle estimation using diversity smoothing in MIMO radar. By introducing interelement spacings, a complete parameter identifiability scheme is proposed, and the antenna numbers and interelement spacings of transmit and receive arrays are derived as functions of the target number and target structure. Optimization models are built to calculate the maximum number of detectable targets for a given target structure.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2022)
Article
Engineering, Aerospace
Chunlei Li, Tengjiao Jiang, Song Liu, Qiang Han
Summary: This paper presents the dispersive behavior and band gap characteristics of a multi-scale periodic composite plate reinforced with graphene platelets (GPLs) and fibers. A semi-analytical approach is proposed for wave analysis, and various parameters are investigated for their effects on wave propagation.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Aerospace
Yuwen Sun, Jinjie Jia, Jinting Xu, Mansen Chen, Jinbo Niu
Summary: This paper provides a state-of-the-art review on research advances in free-form surface machining, focusing on tool path generation, feedrate scheduling, and trajectory planning in both CNC machining and robot machining. It discusses the current research status, existing difficulties, key issues, and future development trends.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Engineering, Aerospace
Chuang Liu, Xiaokui Yue, Jianqiao Zhang, Keke Shi
Summary: An active disturbance rejection control (ADRC) scheme is proposed for electromagnetic docking of spacecraft to handle time-varying delay, fault signals, external disturbances, and elliptical eccentricity. By introducing an intermediate observer (IO) and an auxiliary variable, the relative motion information and total disturbance can be estimated. The proposed ADRC scheme ensures convergence of relative position, relative velocity, and estimation errors. It has advantages in accuracy, robustness, and requirement of no prior knowledge.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2022)
Article
Engineering, Aerospace
Dong Ye, An-Min Zou, Zhaowei Sun
Summary: In this article, a predefined-time predefined-bounded attitude tracking control scheme is proposed for rigid spacecraft with bounded external disturbances. The proposed control law can drive the attitude tracking errors to a predefined-bounded region within a predefined time, independently of initial conditions. The continuous nature of the controller ensures stability.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2022)
Article
Engineering, Aerospace
Bo Li, Wenquan Gong, Yongsheng Yang, Bing Xiao, Dechao Ran
Summary: This article presents a study on the appointed fixed time control problem in the quadrotor unmanned aerial vehicle attitude control system subject to external disturbances. A novel sliding mode observer is established to estimate the external disturbances, and an appointed fixed time controller is proposed to track the desired attitude. The effectiveness and performance of the proposed schemes are demonstrated through numerical simulation results.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2022)
Article
Engineering, Aerospace
Wenhao Zhang, Xingling Shao, Wendong Zhang, Jiaping Qi, Haoze Li
Summary: In this paper, a novel appointed-time funnel control policy is proposed for quadrotors under environmental disturbances and parametric uncertainties. The control strategy utilizes unknown input observers to identify unknown system dynamics and regulates trajectory tracking error profiles within preassigned boundaries. The proposed approach improves the robustness of quadrotors and is validated through simulations and comparisons.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Aerospace
Chengwei Fei, Haotian Liu, Yatsze Choy, Lei Han, Rhea Patricia Liem
Summary: This article introduces a Hierarchical Model Updating Strategy (HMUS) for the dynamic model updating of complex assembled structures. The proposed strategy demonstrates high accuracy and efficiency in handling complex geometry, high nonlinearity, and numerous parameters.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Engineering, Aerospace
Yunfei Liu, Wenyang Hu, Runze Zhu, Babak Safaei, Zhaoye Qin, Fulei Chu
Summary: In this study, a novel computational method for nonlinear impact force in the local contact area is proposed, and the dynamic response of corrugated structures is analyzed. By establishing an equivalent shell model and using numerical solution techniques, the impact response of corrugated shells under low-velocity impact is effectively studied.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Aerospace
Mohsen Pouzesh, Saleh Mobayen
Summary: In this study, an event-trigger-based fractional-order sliding mode control strategy is expanded as an implementation technique for the stabilization of quadrotor unmanned aerial vehicles in the existence of external random/time-varying disturbances. The performance of the suggested control algorithm is investigated through several numerical simulations, and the results demonstrate the efficiency and applicability of the designed control procedure compared to other control techniques.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Aerospace
Omid Mofid, Saleh Mobayen
Summary: In this article, an adaptive backstepping global sliding mode control method is proposed for finite-time tracking control of attitude and position of quad-rotor unmanned aerial vehicles in the presence of input saturation, model uncertainty, and wind perturbation. A compensation system is applied to remove the limitations in controller design caused by input saturation. The unknown upper bounds of model uncertainty and wind perturbation are approximated by an adaptive control procedure. The effectiveness of the proposed method is demonstrated through simulation results in two different scenarios.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2022)
Article
Engineering, Aerospace
Mingzheng Liu, Changhe LI, Yanbin Zhang, Min Yang, Teng Gao, Xin Cui, Xiaoming Wang, Wenhao Xu, Zongming Zhou, Bo Liu, Zafar Said, Runze LI, Shubham Sharma
Summary: In this study, an improved grinding force model based on random grain geometric characteristics is proposed. By establishing the surface topography model of CBN grinding wheel and analyzing the influence mechanism of grain geometric and spatial characteristics, the calculation method under random combination of influencing parameters is obtained. Numerical simulation and experiments verify the feasibility and accuracy of the grinding force model, which provides a theoretical basis for optimizing wheel structure and improving workpiece machining quality.
CHINESE JOURNAL OF AERONAUTICS
(2023)
Article
Engineering, Aerospace
Junyan Hu, Hanlin Niu, Joaquin Carrasco, Barry Lennox, Farshad Arvin
Summary: This paper aims to develop a fault-tolerant cooperation framework for networked UAVs with applications to forest fire monitoring. A cooperative navigation strategy based on network graph theory is proposed to coordinate connected UAVs. A decentralized task reassignment algorithm is applied to improve system robustness. A novel geometry-based collision avoidance approach is proposed to avoid collisions during the mission.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Aerospace
Hadi Jahanshahi, Qijia Yao, Muhammad Ijaz Khan, Irene Moroz
Summary: A unified neural control scheme is developed for output-constrained trajectory tracking of space manipulator under unknown parameters and external perturbations. The proposed controller integrates backstepping control, neural network, and tan-type barrier Lyapunov function. The neural network is utilized for identifying the unknown part in the dynamic model, making the controller model-free and robust to external disturbances. The tan-type barrier Lyapunov function ensures that position tracking errors do not exceed predefined constraints. The closed-loop system achieves semiglobal uniform ultimate boundedness, and all error variables eventually stabilize around zero. Simulations and comparisons verify the effectiveness and tracking performance of the proposed control scheme.
ADVANCES IN SPACE RESEARCH
(2023)
Article
Engineering, Aerospace
Dawen Shen, Miao Cheng, Kevin Wu, Zhaohua Sheng, Jianping Wang
Summary: The integration of nozzle guide vanes into the rotating detonation combustor enhances the detonation strength and pressure gain capability, resulting in greater thrust potential for the turbine engine. A new shock structure is identified, which prevents the typical unstarting issue for turbines.
Article
Engineering, Aerospace
Nicolas Bellomo, Mirko Magarotto, Marco Manente, Fabio Trezzolani, Riccardo Mantellato, Lorenzo Cappellini, Devis Paulon, Antonio Selmo, Davide Scalzi, Marco Minute, Matteo Duzzi, Alessandro Barbato, Alessandro Schiavon, Simone Di Fede, Nabil Souhair, Paola De Carlo, Francesco Barato, Fabiana Milza, Elena Toson, Daniele Pavarin
Summary: REGULUS is an Iodine-based electric propulsion system designed for CubeSat platforms larger than 6 U. It has been integrated on the UniSat-7 satellite for an ongoing In-orbit Demonstration (IoD).
CEAS SPACE JOURNAL
(2022)
Article
Engineering, Aerospace
Weijie Kuang, Qing Miao, Wenfeng Ding, Yanjun Zhao, Biao Zhao, Xuebing Wen, Shaopeng Li
Summary: This study comparatively investigates the fretting wear behavior of polished and ground surfaces in nickel-based superalloys. The morphology of the tribolayer affects the workpiece wear, while the wear mechanism of the tribolayer differs between the two surfaces.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Engineering, Aerospace
Ting Shu, Jin He, Veerendra Dakulagi
Summary: This article presents a new method for 3-D localization of an acoustic source signal by estimating its azimuth-angle, elevation-angle, and radial range. The proposed method exploits a spatially spread acoustic vector sensor and considering the path attenuation and phase difference among the sensor components, a source location estimation method without resorting to self-normalization operation is derived.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2022)
