Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering最新文献

Flight parameter prediction for high-dynamic Hypersonic vehicle system based on pre-training machine learning model 基于预训练机器学习模型的高动态超音速飞行器系统飞行参数预测

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2024-06-14 DOI: 10.1177/09544100231209014

Dengji Zhou, Dawen Huang, Xing Zhang, Ming Tie, Yulin Wang, Yaoxin Shen

引用次数: 0

Numerical two-dimensional optimization of a cylindrical fuselage for bioinspired unmanned aerial vehicle based on non-dominated sorting genetic algorithm-II 基于非支配排序遗传算法的生物启发式无人飞行器圆柱形机身二维数值优化-II

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2024-06-10 DOI: 10.1177/09544100241260108

Bhushan Dewangan, H. Roy

{"title":"Numerical two-dimensional optimization of a cylindrical fuselage for bioinspired unmanned aerial vehicle based on non-dominated sorting genetic algorithm-II","authors":"Bhushan Dewangan, H. Roy","doi":"10.1177/09544100241260108","DOIUrl":"https://doi.org/10.1177/09544100241260108","url":null,"abstract":"To achieve an aerodynamically efficient design of fuselage for bioinspired unmanned aerial vehicles (UAV), the development of a systematic method is of paramount need. This work presents a multiobjective optimization study for shape parameterization of a 2D fuselage of foldable flapping wing UAV in low Reynolds number (2e05) flight conditions. The novelty of the research work lies in integrating S1223 airfoil characteristics for predicting the efficient shape design of the fuselage. This paper offers four sections; (i) the validation of the ANSYS Fluent model with experiment, (ii) the exploration of design variables using Design of Experiment (Sparse Grid Initialization), (iii) the implementation of response surface method (Genetic Aggregation) to know about dimensional sensitivity among independent and dependent variables and (iv) the application of multiobjective optimization method i.e. NSGA II to optimize the drag and lift coefficient. To identify the superiority, a comparative study between the original and optimized fuselage is presented considering many parameters like pressure contours, velocity contours, pressure coefficients, and streamlines representations. It is evident from various results that the 2D optimum shape significantly minimizes the drag coefficient and increases the lift coefficient. This work also makes room for 3D shape optimization, which helps in prototype fabrication for real-time flight conditions.","PeriodicalId":506990,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering","volume":"112 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141362297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamics and capability of along orbit debris self-collecting with rotating constant magnets 利用旋转恒定磁铁自收集沿轨碎片的动力学和能力

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2024-06-07 DOI: 10.1177/09544100241260086

Yuan-wen Zhang, Tian Ma

引用次数: 0

Investigating the unsteady flow mechanism at the lip of a ducted fan in crosswind 研究横风中管道风机唇部的不稳定流动机制

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2024-06-07 DOI: 10.1177/09544100241260101

Siwei Wang, Yangang Wang, Fang Zhou, Yue Xv

{"title":"Investigating the unsteady flow mechanism at the lip of a ducted fan in crosswind","authors":"Siwei Wang, Yangang Wang, Fang Zhou, Yue Xv","doi":"10.1177/09544100241260101","DOIUrl":"https://doi.org/10.1177/09544100241260101","url":null,"abstract":"The unsteady numerical analysis method was utilized to investigate the unsteady flow structure of a contra-rotating ducted fan under crosswind conditions. The development and evolution mechanism of the lip vortex under the combined action of crosswind and rotor were studied. Two perspectives, namely the time-averaged flow field and unsteady time-frequency analysis, were employed for the examination. The results indicate that the unsteady aerodynamic forces exerted on the lip of the ducted fan are primarily influenced by four sets of frequencies, ranked in descending order of magnitude: 1 BPF (Blade Passing Frequency) of the upstream rotor, 1 BPF of the downstream rotor, the combined effect of the 1 BPF of the upstream rotor and 1 BPF of the downstream rotor, and 2 BPF of the upstream rotor. The maximum velocity occurs at the position where the inner surface of the windward side lip is inclined 40° from the freestream velocity direction, and a stable separation vortex is formed below this region. The lip separation vortex triggers the generation of blade suction side separation vortex in the upstream rotor, and its periodic formation, growth, shedding, and dissipation are the primary factors contributing to the unsteady flow. The research findings lay the groundwork for further advancements in active and passive flow control technologies under crosswind conditions.","PeriodicalId":506990,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering","volume":" 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141372702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Control strategy for trading off solar power and control input while rendezvous and docking 交会对接时太阳能与控制输入权衡的控制策略

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2024-06-03 DOI: 10.1177/09544100241257292

Abhijeet Abhijeet, Tanya K Kumar, D. Giri

{"title":"Control strategy for trading off solar power and control input while rendezvous and docking","authors":"Abhijeet Abhijeet, Tanya K Kumar, D. Giri","doi":"10.1177/09544100241257292","DOIUrl":"https://doi.org/10.1177/09544100241257292","url":null,"abstract":"This paper presents a novel strategy for decoupling the attitude and orbit equations of a CubeSat for rendezvous and docking with an uncontrollable cooperative target. For computing a safe trajectory, the proposed control algorithm takes into account the solar energy received by the CubeSat. The CubeSat is equipped with a thruster for orbit maneuvers, magnetic coils for attitude control, and four fixed single-sided rectangular solar panels. The coupled dynamics arising from the dynamical model of the spacecraft is solved using a novel weighted vector-based approach. This paper presents a linearized nonlinear optimal control problem arising in small spacecrafts while trying to maximize solar energy input in the rendezvous and docking process. An intermediate orbit is defined and used to divide the problem into two different optimal control problems: rendezvous optimization and docking optimization problems. A geometrical approach based on the shape of the chaser and the target is contemplated for collision avoidance while docking. The proposed controller design is modified whenever the sunlight is obstructed by the Earth, and the maneuvering controls are redesigned accordingly for optimal rendezvous and docking. Numerical simulations have been carried out to show the efficacy of the proposed concept for steering the trade-off between solar energy and control input during the rendezvous and docking of CubeSat with a tumbling target.","PeriodicalId":506990,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering","volume":"116 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141272238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Finite-time consensus of heterogeneous unmanned aerial agents in network with fixed and switching topology 固定拓扑和交换拓扑网络中异构无人机代理的有限时间共识

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2024-05-24 DOI: 10.1177/09544100241254411

Madhumita Pal

引用次数: 0

Intermittent fault diagnosis in connector components based on arc wave characteristics 基于电弧波特性的连接器组件间歇性故障诊断

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2024-05-22 DOI: 10.1177/09544100241253317

Xianzhe Cheng, K. Lv, Yong Zhang, Wenxiang Yang, Lei Wang, Weihu Zhao, Guanjun Liu, Jing Qiu

{"title":"Intermittent fault diagnosis in connector components based on arc wave characteristics","authors":"Xianzhe Cheng, K. Lv, Yong Zhang, Wenxiang Yang, Lei Wang, Weihu Zhao, Guanjun Liu, Jing Qiu","doi":"10.1177/09544100241253317","DOIUrl":"https://doi.org/10.1177/09544100241253317","url":null,"abstract":"Intermittent faults are widely present in aviation electronic devices, especially in various electrical connectors. It is usually hard to diagnose the source of the intermittent faults, which brings a huge challenge to the repair and maintenance of equipment. This paper focuses on the intermittent faults in typical aviation electrical connectors activated by shock test. The transient arc wave is observed on a nanosecond scale during the occurrence of the intermittent faults. An arc signal model is constructed to analyze the impact factors of the signal. Based on the arc wave characteristics, further intermittent fault diagnostic analyses are conducted on four types of connector components: damaged solder joints, cracked pin connections, loose wire connections and worn electrical connectors. The effective arc wave components of the raw signals are extracted using Variational Mode Decomposition (VMD), and a comparison is made between traditional diagnostic method and CNN-based deep learning method. The results show that the combination of VMD-CNN-SVM achieves the optimal diagnostic effect. The diagnostic results reflect that the proposed arc signal features are suitable for diagnosing intermittent faults in connector components.","PeriodicalId":506990,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering","volume":"42 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141110874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of open crack on axial compressor performance 开裂对轴流压缩机性能的影响

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2024-05-17 DOI: 10.1177/09544100241252230

Zhongyi Wang, Tianchu Song, Yanhua Wang, Zheng Li, Shuguang Chu

引用次数: 0

Aeroelastic analysis of a lightweight topology-optimized sandwich panel 轻质拓扑优化夹芯板的气动弹性分析

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2024-05-10 DOI: 10.11606/t.18.2023.tde-24112023-100910

Maliheh Najafi, António J. M. Ferreira, Flávio D. Marques

{"title":"Aeroelastic analysis of a lightweight topology-optimized sandwich panel","authors":"Maliheh Najafi, António J. M. Ferreira, Flávio D. Marques","doi":"10.11606/t.18.2023.tde-24112023-100910","DOIUrl":"https://doi.org/10.11606/t.18.2023.tde-24112023-100910","url":null,"abstract":"Sandwich structures with lattice cores are novel, lightweight composite structures and are widely used in the aerospace industry. Besides, the aeroelastic behavior of sandwich panels in a supersonic flow regime still needs to be thoroughly studied. This work investigates the supersonic flutter of a sandwich panel whose core is topology-optimized. A finite element model of a sandwich panel based on the layerwise theory, coupled with the first-order piston theory, is presented. The sandwich panel core is assessed using a topology optimization approach with flutter loading constraints. The subsequent analytical homogenization scheme is developed to provide the equivalent mechanical properties of the topology-optimized panel. The modeling approach is fully validated, and the results demonstrate that the sandwich panel is capable of enlarging the flutter-free operational flight range when compared with other conventional panel designs. A parametric analysis of the topology-optimized sandwich panel regarding the critical flutter conditions is performed.","PeriodicalId":506990,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering","volume":" 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140991669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improved time-variable transformer-based fault diagnosis method for satellite attitude control system 卫星姿态控制系统基于时变变压器的改进型故障诊断方法

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Pub Date : 2024-04-24 DOI: 10.1177/09544100241248732

Wei Zhang, Sida Chen, Sheng Gao, Zhaoguang Wang, Qinkun Cheng

引用次数: 0