The Aeronautical Journal最新文献_第2页

Multiple model fault diagnosis and fault tolerant control for the launch vehicle’s attitude control system 运载火箭姿态控制系统的多模型故障诊断和容错控制

The Aeronautical Journal Pub Date : 2024-05-09 DOI: 10.1017/aer.2024.14

X. Chang-lin, Y. Shu-ming, C. Yu-qiang, S. Li-jun

引用次数: 0

Pilot performance during simulated point and boundary avoidance tracking tasks 飞行员在模拟避点和避界跟踪任务中的表现

The Aeronautical Journal Pub Date : 2024-04-24 DOI: 10.1017/aer.2024.35

Q. Xia, D. Marchesoli, P. Masarati, M. Liu

引用次数: 0

Rapid dynamic aeroelastic response analysis of the highly flexible wing with distributed propellers influence 带分布式螺旋桨影响的高弹性机翼的快速动态气动弹性响应分析

The Aeronautical Journal Pub Date : 2024-04-24 DOI: 10.1017/aer.2024.43

X. Wu, Z. Zhou, Z.P. Wang

{"title":"Rapid dynamic aeroelastic response analysis of the highly flexible wing with distributed propellers influence","authors":"X. Wu, Z. Zhou, Z.P. Wang","doi":"10.1017/aer.2024.43","DOIUrl":"https://doi.org/10.1017/aer.2024.43","url":null,"abstract":"\u0000 A rapid nonlinear aeroelastic framework for the analysis of the highly flexible wing with distributed propellers is presented, validated and applied to investigate the propeller effects on the wing dynamic response and aeroelastic stability. In the framework, nonlinear beam elements based on the co-rotational method are applied for the large-deformation wing structure, and an efficient cylinder coordinate generation method is proposed for attached propellers at different position. By taking advantage of the relatively slow dynamics of the high-aspect-ratio wing, propeller wake is modeled as a quasi-steady skewed vortex cylinder with no updating process to reduce the high computational cost. Axial and tangential induced velocities are derived and included in the unsteady vortex lattice method. For the numerical cases explored, results indicate that large deformation causes thrust to produce wing negative torsion which limits the displacement oscillation, and slipstream mainly increases the response values. In addition, an improvement of flutter boundary is found with the increase of propeller thrust while slipstream brings a destabilising effect as a result of the increment of dynamic pressure and local lift. The great potential of distributed propellers in gust alleviation and flutter suppression of such aircraft is pointed out and the method as well as conclusions in this paper can provide further guidance.","PeriodicalId":508971,"journal":{"name":"The Aeronautical Journal","volume":"40 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140661064","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

Experimental investigation of a Y-shaped engine inlet at subsonic flow conditions 亚音速流动条件下 Y 型发动机进气口的实验研究

The Aeronautical Journal Pub Date : 2024-04-24 DOI: 10.1017/aer.2024.39

U.C. Küçük

引用次数: 0

Gas turbine prognostics via Temporal Fusion Transformer 通过时态融合变换器进行燃气轮机预报分析

The Aeronautical Journal Pub Date : 2024-04-24 DOI: 10.1017/aer.2024.40

A. Fentaye, K.G. Kyprianidis

{"title":"Gas turbine prognostics via Temporal Fusion Transformer","authors":"A. Fentaye, K.G. Kyprianidis","doi":"10.1017/aer.2024.40","DOIUrl":"https://doi.org/10.1017/aer.2024.40","url":null,"abstract":"\u0000 Gas turbines play a vital role in various industries. Timely and accurately predicting their degradation is essential for efficient operation and optimal maintenance planning. Diagnostic and prognostic outcomes aid in determining the optimal compressor washing intervals. Diagnostics detects compressor fouling and estimates the trend up to the current time. If the forecast indicates fast progress in the fouling trend, scheduling offline washing during the next inspection event or earlier may be crucial to address the fouling deposit comprehensively. This approach ensures that compressor cleaning is performed based on its actual health status, leading to improved operation and maintenance costs. This paper presents a novel prognostic method for gas turbine degradation forecasting through a time-series analysis. The proposed approach uses the Temporal Fusion Transformer model capable of capturing time-series relationships at different scales. It combines encoder and decoder layers to capture temporal dependencies and temporal-attention layers to capture long-range dependencies across the encoded degradation trends. Temporal attention is a self-attention mechanism that enables the model to consider the importance of each time step degradation in the context of the entire degradation profile of the given health parameter. Performance data from multiple two-spool turbofan engines is employed to train and test the method. The test results show promising forecasting ability of the proposed method multiple flight cycles into the future. By leveraging the insights provided by the method, maintenance events and activities can be scheduled in a proactive manner. Future work is to extend the method to estimate remaining useful life.","PeriodicalId":508971,"journal":{"name":"The Aeronautical Journal","volume":"19 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140660448","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

Prediction of wrinkle patterns in tensioned thin-film structures containing rigid elements 包含刚性元素的拉伸薄膜结构的皱纹预测

The Aeronautical Journal Pub Date : 2024-04-19 DOI: 10.1017/aer.2024.6

P. Sun, J. Huang, J.Y. Zhang, F.B. Meng, P.B. Zhao

{"title":"Prediction of wrinkle patterns in tensioned thin-film structures containing rigid elements","authors":"P. Sun, J. Huang, J.Y. Zhang, F.B. Meng, P.B. Zhao","doi":"10.1017/aer.2024.6","DOIUrl":"https://doi.org/10.1017/aer.2024.6","url":null,"abstract":"\u0000 With the in-depth study of thin-film structures, nonuniform thin films with rigid elements have been applied in the aerospace and flexible electronics industries. For thin-film structures with rigid elements, there is an interaction force between the rigid element and the thin film; therefore, the wrinkling mode of the thin film changes under the influence of the interaction force. In this study, a wrinkle model was developed to predict the wrinkle morphology of thin-film structures with rigid elements on the diagonal. First, the wrinkle patterns of the rigid elements were observed at different positions using tensile experiments. Then, the relationship between the tilt of the rigid element and the wrinkle wavelength was investigated using a finite-element eigenvalue buckling analysis. Finally, local wrinkling caused by the perturbed stress of the rigid element was introduced, and a wrinkling model of a square thin film with rigid elements on the diagonal under tension was established. The theoretical analysis results were compared with simulation and experimental results, demonstrating that the model can accurately describe the wrinkle patterns of thin-film structures containing rigid elements on the diagonal under tension.","PeriodicalId":508971,"journal":{"name":"The Aeronautical Journal","volume":" 106","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140684935","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

Altering flight stability characteristics of a high-performance aircraft through wing strake modification 通过修改翼带改变高性能飞机的飞行稳定性特征

The Aeronautical Journal Pub Date : 2024-04-18 DOI: 10.1017/aer.2024.32

H. Raza, A. Maqsood, J. Masud

引用次数: 0

Aerodynamic characteristics of different configurations of mechanically deployable aerodynamic decelerator in subsonic region 亚音速区域不同配置的机械展开式空气动力减速器的空气动力特性

The Aeronautical Journal Pub Date : 2024-04-16 DOI: 10.1017/aer.2024.28

C. Yun, D. Liu

引用次数: 0

Distributed digital twins for health monitoring: resource constrained aero-engine fleet management 用于健康监测的分布式数字双胞胎：资源受限的航空发动机机队管理

The Aeronautical Journal Pub Date : 2024-04-15 DOI: 10.1017/aer.2024.23

A. Hartwell, F. Montana, W. Jacobs, V. Kadirkamanathan, N. Ameri, A. R. Mills

{"title":"Distributed digital twins for health monitoring: resource constrained aero-engine fleet management","authors":"A. Hartwell, F. Montana, W. Jacobs, V. Kadirkamanathan, N. Ameri, A. R. Mills","doi":"10.1017/aer.2024.23","DOIUrl":"https://doi.org/10.1017/aer.2024.23","url":null,"abstract":"\u0000 Sensed data from high-value engineering systems is being increasingly exploited to optimise their operation and maintenance. In aerospace, returning all measured data to a central repository is prohibitively expensive, often causing useful, high-value data to be discarded. The ability to detect, prioritise and return useful data on asset and in real-time is vital to move toward more sustainable maintenance activities.\u0000 We present a data-driven solution for on-line detection and prioritisation of anomalous data that is centrally processed and used to update individualised digital twins (DT) distributed onto remote machines. The DT is embodied as a convolutional neural network (CNN) optimised for real-time execution on a resource constrained gas turbine monitoring computer. The CNN generates a state prediction with uncertainty, which is used as a metric to select informative data for transfer to a remote fleet monitoring system. The received data is screened for faults before updating the weights on the CNN, which are synchronised between real and virtual asset.\u0000 Results show the successful detection of a known in-flight engine fault and the collection of data related to high novelty pre-cursor events that were previously unrecognised. We demonstrate that data related to novel operation are also identified for transfer to the fleet monitoring system, allowing model improvement by retraining. In addition to these industrial dataset results, reproducible examples are provided for a public domain NASA dataset.\u0000 The data prioritisation solution is capable of running in real-time on production-standard low-power embedded hardware and is deployed on the Rolls-Royce Pearl 15 engines.","PeriodicalId":508971,"journal":{"name":"The Aeronautical Journal","volume":"315 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140703538","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

Aerothermal and aerodynamic characteristics of reusable hypersonic vehicles with heat transfer minimised sweepback 可重复使用的高超音速飞行器的热量和空气动力特性，传热最小化回扫

The Aeronautical Journal Pub Date : 2024-04-11 DOI: 10.1017/aer.2024.27

R.B. Shilwant, S. Mahulikar

{"title":"Aerothermal and aerodynamic characteristics of reusable hypersonic vehicles with heat transfer minimised sweepback","authors":"R.B. Shilwant, S. Mahulikar","doi":"10.1017/aer.2024.27","DOIUrl":"https://doi.org/10.1017/aer.2024.27","url":null,"abstract":"\u0000 Establishing aerothermal criteria for swept leading-edge hypersonic vehicle design is the predominant purpose of this work. This study is focused on two different configurations of vehicles based on the swept-back angle (\u0000 \u0000 \u0000 \u0000$varLambda$\u0000\u0000 \u0000 ) viz. minimum drag (\u0000 \u0000 \u0000 \u0000$varLambda$\u0000\u0000 \u0000 \u0000 Drag-min\u0000 ), and minimum heat transfer to vehicle (\u0000 \u0000 \u0000 \u0000$varLambda$\u0000\u0000 \u0000 \u0000 HT-min\u0000 ). Maximum wall temperatures obtained from the simulation performed in ANSYS 2020 with the k-epsilon turbulence model are 1,013 and 970K for \u0000 \u0000 \u0000 \u0000$varLambda$\u0000\u0000 \u0000 \u0000 Drag-min\u0000 and \u0000 \u0000 \u0000 \u0000$varLambda$\u0000\u0000 \u0000 \u0000 HT-min\u0000 , respectively. These temperatures are used to obtain the corresponding thicknesses of thermal protection systems to maintain inner wall temperature at 323K. Further study is divided into two cases depending on the direction of thickness of thermal protection system with respect to vehicle body. For constant payload capacity, the direction of thickness is outside; whereas for constant overall volume case, direction of thickness is inside. For constant payload volume case, the percentage weight reduction of thermal protection system is 4.8%. For constant overall volume case, the percentage payload capacity increases with design at \u0000 \u0000 \u0000 \u0000$varLambda$\u0000\u0000 \u0000 \u0000 HT-min\u0000 by 4.04% in addition to thermal protection system weight reduction. The lift-induced drag on vehicles with design at \u0000 \u0000 \u0000 \u0000$varLambda$\u0000\u0000 \u0000 \u0000 HT-min\u0000 is significantly reduced for both cases, by 47.68% (for constant payload volume) and 45.27% (for constant overall volume).","PeriodicalId":508971,"journal":{"name":"The Aeronautical Journal","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140716049","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