Aerospace Systems最新文献_第10页

Developing a novel battery management algorithm with energy budget calculation for low Earth orbit (LEO) spacecraft 为低地球轨道（LEO）航天器开发一种具有能量预算计算功能的新型电池管理算法

Aerospace Systems Pub Date : 2023-12-08 DOI: 10.1007/s42401-023-00260-3

Mohamed Ahmed Mokhtar, H. Amer Fawzy ElTohamy, Z. Elhalwagy Yehia, E. Hanafy Mohamed

{"title":"Developing a novel battery management algorithm with energy budget calculation for low Earth orbit (LEO) spacecraft","authors":"Mohamed Ahmed Mokhtar, H. Amer Fawzy ElTohamy, Z. Elhalwagy Yehia, E. Hanafy Mohamed","doi":"10.1007/s42401-023-00260-3","DOIUrl":"10.1007/s42401-023-00260-3","url":null,"abstract":"<div><p>The electrical power system (EPS) of a spacecraft (SC) plays a crucial role in the mission's success. This system provides electrical power to all loads of SC until its end of life (EOL). The primary power source onboard for the SC is the solar array (SA), while the storage battery serves as the secondary power source. We have developed a software program called the SC Charging Analysis Tool with Battery Management Algorithm (BMA) to address the challenges associated with the SC battery's charging and discharging processes. This tool fulfills two main objectives: first, to develop a BMA that effectively controls the battery charging and discharging processes through all modes of SC operation; second, to create a battery management environment with SC energy budget calculation capabilities to simulate the dynamic behavior of the SC battery using the developed BMA, thereby ensuring battery health. The battery management environment is specifically designed to verify the proper performance of the battery throughout the SC's lifetime and to execute operations during nominal conditions and throughout worst-case scenarios. Moreover, through the SC energy budget calculation, we can optimize the requirements of the chosen scenario to fit with the selected battery. However, during worst-case scenarios, the battery's vital parameters, including state of charge (SOC), thermal emission, voltage, and pressure, are calculated to verify its proper operation under the developed BMA. The dynamic behavior of the battery, in conjunction with the developed algorithms, will be validated using real telemetry data. The key result of this paper is the invention of a BMA, which contributes to the advanced management of SC battery systems and, consequently, better durability during challenging operational scenarios.</p></div>","PeriodicalId":36309,"journal":{"name":"Aerospace Systems","volume":"7 1","pages":"143 - 157"},"PeriodicalIF":0.0,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138588999","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

Study of wedge-shaped Jet tabs for effective Thrust vector control in Supersonic vehicles 研究楔形射流片以有效控制超音速飞行器的推力矢量

Aerospace Systems Pub Date : 2023-12-08 DOI: 10.1007/s42401-023-00257-y

V. M. Jyothy, G. Jims John Wessley, A. Brusly Solomon

{"title":"Study of wedge-shaped Jet tabs for effective Thrust vector control in Supersonic vehicles","authors":"V. M. Jyothy, G. Jims John Wessley, A. Brusly Solomon","doi":"10.1007/s42401-023-00257-y","DOIUrl":"10.1007/s42401-023-00257-y","url":null,"abstract":"<div><p>This work explores the thrust vector control in a 2D convergent divergent nozzle with wedge shaped jet tab. The Computational analysis has been carried out with different thickness and height of jet tabs. The flow topology analysis is carried out qualitatively and quantitatively. The wedge-shaped jet tabs with 10%, 20%, 30% and 40% of height and 10 mm, 12 mm, 14 mm, 16 mm thickness are considered for right isosceles, left isosceles and isosceles shapes. The deflection angle is calculated to identify the best effective thrust deflection configuration. Results indicate that, when thickness and height of jet tab increases the deflection angle reduces due to the formation of mixing layer and shock wave generation. Also, depending on the shape of jet tab the oblique shock formation and angle of shock varied. The thickness-based CFD optimization shows that a 4.66° deflection angle with 10 mm thickness and 40% height isosceles tab produces the best deflection. The right jet tab with 12 mm and 14 mm thickness with 30% and 20% height shows 4.75° and 4.14° deflection angle. In the case of 16 mm thickness tab, left isosceles jet tab with 10% height shows 4.14° of deflection angle. It is concluded form the study that, the highest rate of deflection was produced by the right isosceles tab with 12 mm thickness and 30% height. This can be used for thrust deflection in supersonic aircrafts and missiles.</p></div>","PeriodicalId":36309,"journal":{"name":"Aerospace Systems","volume":"7 3","pages":"565 - 573"},"PeriodicalIF":0.0,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138587460","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

Improvement in aerodynamic efficiency of trainer aircraft wing using co flow jet method 利用共流喷射法提高教练机机翼的气动效率

Aerospace Systems Pub Date : 2023-12-01 DOI: 10.1007/s42401-023-00256-z

J. Anish, G. M. Joselin Herbert, K. Balaji

引用次数: 0

Utilizing deep reinforcement learning for tactile-based autonomous capture of non-cooperative objects in space 利用深度强化学习，基于触觉自主捕捉空间中的非合作物体

Aerospace Systems Pub Date : 2023-11-24 DOI: 10.1007/s42401-023-00254-1

Bahador Beigomi, Zheng H. Zhu

{"title":"Utilizing deep reinforcement learning for tactile-based autonomous capture of non-cooperative objects in space","authors":"Bahador Beigomi, Zheng H. Zhu","doi":"10.1007/s42401-023-00254-1","DOIUrl":"10.1007/s42401-023-00254-1","url":null,"abstract":"<div><p>The focus of this research is the creation of a deep reinforcement learning approach to tackle the challenging task of robotic gripping through tactile sensor data feedback. Leveraging deep reinforcement learning, we have sidestepped the necessity to design features manually, which simplifies the issue and allows the robot to acquire gripping strategies via trial-and-error learning. Our technique utilizes an off-policy reinforcement learning model, integrating deep deterministic policy gradient structure and twin delayed attributes to facilitate maximum precision in gripping floating items. We have formulated a comprehensive reward function to provide the agent with precise, insightful feedback to facilitate the learning of the gripping task. The training of our model was executed solely in a simulated environment using the PyBullet framework and did not require demonstrations or pre-existing knowledge of the task. We examined a gripping task with a 3-finger Robotiq gripper for a case study, where the gripper had to approach a floating object, pursue it, and eventually grip it. This training methodology in a simulated setting allowed us to experiment with various scenarios and conditions, thereby enabling the agent to develop a resilient and adaptable grip policy.</p></div>","PeriodicalId":36309,"journal":{"name":"Aerospace Systems","volume":"7 2","pages":"251 - 260"},"PeriodicalIF":0.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139240458","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

ML-based LOS/NLOS/multipath signal classifiers for GNSS in simulated multipath environment 模拟多径环境中基于 ML 的全球导航卫星系统 LOS/NLOS/ultipath 信号分类器

Aerospace Systems Pub Date : 2023-11-18 DOI: 10.1007/s42401-023-00255-0

S. R. S. Jyothsna Koiloth, Dattatreya Sarma Achanta, Padma Raju Koppireddi

{"title":"ML-based LOS/NLOS/multipath signal classifiers for GNSS in simulated multipath environment","authors":"S. R. S. Jyothsna Koiloth, Dattatreya Sarma Achanta, Padma Raju Koppireddi","doi":"10.1007/s42401-023-00255-0","DOIUrl":"10.1007/s42401-023-00255-0","url":null,"abstract":"<div><p>The position accuracy of GNSS is limited by several errors including multipath error. The multipath error is well known as one of the dominant error sources in most of the high-precision GNSS applications, as its fast-changing and site-dependent nature make it challenging to model and mitigate. The Non-Line-of-Sight (NLOS) signals in combination with the original Line-of-Sight (LOS) signal lead to multipath (MP), which results in erroneous range estimation. To mitigate the effect of multipath, detecting the presence of NLOS/multipath signals plays a vital role. In this paper, GPS and IRNSS signals are considered in simulated multipath environment and in open-sky conditions. A machine learning (ML) approach for classification of LOS/NLOS/multipath is presented in both the environments. In this paper, two classifiers are proposed. The proposed classifiers are trained with signal strength, elevation angle, Doppler shift, delta pseudorange, and pseudorange residuals as attributes. The accuracies of these models are computed and compared and it is found that, among all the algorithms, K-Nearest Neighbors, Decision Tree, and its ensemble functions have demonstrated superior performance. Experimental results are presented using GPS L1, IRNSS L5, and S1 data. A comparative analysis on both the classifiers is also presented. Further, to substantiate these results, another experiment is conducted in a complex real-time dynamic multipath environment and the obtained results are also presented.</p></div>","PeriodicalId":36309,"journal":{"name":"Aerospace Systems","volume":"7 2","pages":"237 - 250"},"PeriodicalIF":0.0,"publicationDate":"2023-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139261383","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

Numerical studies on uncontrolled and controlled shock wave/boundary layer interactions in hypersonic intake 高超音速进气中的非受控和受控冲击波/边界层相互作用的数值研究

Aerospace Systems Pub Date : 2023-10-31 DOI: 10.1007/s42401-023-00252-3

Dorbala Sai Naga Bharghava, Amit Krishnat Mali, Tamal Jana, Mrinal Kaushik

{"title":"Numerical studies on uncontrolled and controlled shock wave/boundary layer interactions in hypersonic intake","authors":"Dorbala Sai Naga Bharghava, Amit Krishnat Mali, Tamal Jana, Mrinal Kaushik","doi":"10.1007/s42401-023-00252-3","DOIUrl":"10.1007/s42401-023-00252-3","url":null,"abstract":"<div><p>Understanding the phenomenon of Shock Wave/Boundary Layer Interaction (SBLI) is critical in developing hypersonic aircraft as it is associated with several penalties, such as huge total pressure loss, boundary layer separation, tremendous temperature rise, fluctuating pressure, and thermal load. The consequences become severe, particularly at hypersonic speeds. Thus, it is essential to control the occurrence of SBLIs to minimize these repercussions. With this in mind, the current study numerically investigates the efficacy of an array of Micro-Vortex Generators (MVGs) placed upstream and at the interaction region in the Mach 5.7 intake. The computational analysis was performed using the finite volume solver Ansys fluent and a 3-dimensional numerical model. MVGs of three different heights (0.5 mm, 0.7 mm, and 1.0 mm) were considered to understand the detailed impact of MVGs height on controlling interactions. The steady-state analysis was carried out using shear stress transport (SST) <i>k</i>–<i>ω</i> turbulence model. Besides, Delayed Detached Eddy Simulation (DES) combined with SST k-omega is specifically considered for unsteady analysis to observe the flow evolution. The quantitative and qualitative analysis has been conducted by examining the static pressure and velocity distributions over the ramp surface and visualizing the shock structures. A maximum of 9.84% reduction in wall static pressure is observed for the MVGs of 1.0 mm height when stationed at the interaction region. The MVGs of 0.7 mm height, placed upstream of the interaction region, are proved to be more efficient than other MVGs. However, pressure recovery and turbulence intensity are maximum for 0.5 mm MVGs, when deployed upstream of the interaction zone.</p></div>","PeriodicalId":36309,"journal":{"name":"Aerospace Systems","volume":"7 3","pages":"539 - 557"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135870040","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

Doppler collision analysis and mitigation using hybrid approach for NavIC system 基于混合方法的导航系统多普勒碰撞分析与缓解

Aerospace Systems Pub Date : 2023-10-20 DOI: 10.1007/s42401-023-00251-4

P. Sathish, D. Krishna Reddy, V. Lokendra Kumar, A. D. Sarma

{"title":"Doppler collision analysis and mitigation using hybrid approach for NavIC system","authors":"P. Sathish, D. Krishna Reddy, V. Lokendra Kumar, A. D. Sarma","doi":"10.1007/s42401-023-00251-4","DOIUrl":"10.1007/s42401-023-00251-4","url":null,"abstract":"<div><p>Doppler collision has a very important issue in satellite-based navigation systems. Navigation with the Indian Constellation (NavIC) comprises seven operational satellites, among which three are geo-stationary (GEO) satellites, and the rest are geosynchronous satellites. Due to the 'small line of sight velocities' of GEO satellites, estimated ranges suffer from the unique challenge of Doppler collision (DC). In this study, we present an analysis of DC events in both static and dynamic conditions, particularly in aerospace applications. We utilize experimental data acquired from the Indian Regional Navigation Satellite System (IRNSS)-GPS-Satellite Based Augmentation System (SBAS) (IGS) receiver located at a low altitude station to develop algorithms for the prediction, avoidance, and mitigation of DC events. The prediction of DC is based on the moving average method. We have devised an efficient algorithm to avoid the occurrence of DC, considering all possible combinations of IRNSS GEO satellites. Additionally, we perform the mitigation of DC using a proposed hybrid approach that involves both the space segment and user segment. The approach is based on repositioning the IRNSS 1C satellite and varying the loop bandwidth of the Delay Locked Loop (DLL). With the implementation of this proposed hybrid approach, the time duration of DC is reduced by 59.16% in static conditions and 16% in dynamic conditions.</p></div>","PeriodicalId":36309,"journal":{"name":"Aerospace Systems","volume":"6 4","pages":"677 - 688"},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135617581","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

Group motion control for UAV swarm confrontation using distributed dynamic target assignment 基于分布式动态目标分配的无人机群对抗群运动控制

Aerospace Systems Pub Date : 2023-10-15 DOI: 10.1007/s42401-023-00250-5

Ziqi Guo, Yuankai Li, Yuan Wang, Lianxing Wang

{"title":"Group motion control for UAV swarm confrontation using distributed dynamic target assignment","authors":"Ziqi Guo, Yuankai Li, Yuan Wang, Lianxing Wang","doi":"10.1007/s42401-023-00250-5","DOIUrl":"10.1007/s42401-023-00250-5","url":null,"abstract":"<div><p>For UAV swarm confrontation, group motion control is the key of UAV swarm to accomplish the assigned task, in which target assignment is the premise of group movement of UAVs. Most of the target assignment algorithms used in the traditional unmanned aerial vehicle (UAV) swarm confrontation are centralized, which can match and optimize targets in the static environment of limited aircraft units. However, many limitations will be generated if applied to the dynamic confrontation tasks of large-scale UAV clusters. Moreover, the countermeasures of the traditional UAV swarm countermeasure model are relatively simple and not suitable for the complex countermeasures task requirements in reality. To solve the above problems, a group motion control method using the extend consensus-based bundle algorithm (ECBBA) algorithm is proposed in this paper to carry out the dynamic grouping behavior of UAV swarm. The distributed target assignment algorithm is assembled to improve the efficiency of grouping, supporting the UAV dynamic real-time target assignment, for implementing large-scale group dynamic confrontation. The proposed group motion control strategy of UAV swarm is designed, based on the control of single-group motion and the setting of confrontation behavior. The effectiveness of the proposed ECBBA-based group motion control strategy is verified by simulation experiments.</p></div>","PeriodicalId":36309,"journal":{"name":"Aerospace Systems","volume":"6 4","pages":"689 - 701"},"PeriodicalIF":0.0,"publicationDate":"2023-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136185264","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

Unerroric of assessment of professional competence for aviation personnel 航空人员专业能力评估的误差

Aerospace Systems Pub Date : 2023-10-13 DOI: 10.1007/s42401-023-00249-y

Andrey E. Sorokin, Adeliya Yu. Burova

{"title":"Unerroric of assessment of professional competence for aviation personnel","authors":"Andrey E. Sorokin, Adeliya Yu. Burova","doi":"10.1007/s42401-023-00249-y","DOIUrl":"10.1007/s42401-023-00249-y","url":null,"abstract":"<div><p>The questions connected with automation of testing of professional skills for aviation personnel on aircraft on-board facilities taking into account psychophysiological peculiarities of all tested persons are considered. The aim of the study is to find additional means of tightening the quality control of professional training for aviation personnel, taking into account the psychophysiological aspect of this control. To achieve the above-mentioned goal, the issues of tightening control for aviation personnel competence level during their training on computer simulators in conditions as close as possible to the real operating conditions of aviation equipment were solved. The research material is the obtained and processed information about the number of recorded changes in operating conditions of aviation equipment, the maximum speed for aviation personnel reaction to changes in its operating conditions, the median speed for aviation personnel reaction to changes in these conditions, the minimum speed of its reaction to changes in the same conditions, the number of decisions made by aviation personnel, the number of correctly made decisions, the number of incorrectly made decisions, and the maximum speed of decision-making by aviation personnel. In the process of research, the procedures of directed enumeration and comparative analysis for aviation personnel training results on computer simulators. When conducting the research, methods of software and hardware-software modeling for aviation personnel operation procedures on aircraft on-board facilities were used. The use of the so-called FLIGHTESTS as a set of individual tasks with control questions and electronic forms for the report on the performance of these tasks and answers to control questions is proposed. These FLIGHTESTS can and should be considered the basis for unerroric to assess the professional competence for aviation personnel. This unerroric will provide additional opportunities to tighten the quality control of professional training for aviation personnel.</p></div>","PeriodicalId":36309,"journal":{"name":"Aerospace Systems","volume":"7 2","pages":"227 - 235"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135853652","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

Transient state flow and heat transfer performance over the flat tip of HP turbine 高压涡轮机平顶上的瞬态流动和传热性能

Aerospace Systems Pub Date : 2023-09-12 DOI: 10.1007/s42401-023-00247-0

Jiuchun Li, Jinfang Teng, Shaopeng Lu

引用次数: 0