2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)最新文献_第7页

Ordinal Position Based Nonlinear Normalization Method in Temporal-Difference Reinforced Learning 时间差分强化学习中基于有序位置的非线性归一化方法

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522465

Du Runle, Liu Jiaqi, Wang Yonghai, Jiang Zhiye, Zhou Di

{"title":"Ordinal Position Based Nonlinear Normalization Method in Temporal-Difference Reinforced Learning","authors":"Du Runle, Liu Jiaqi, Wang Yonghai, Jiang Zhiye, Zhou Di","doi":"10.1109/ICMAE52228.2021.9522465","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522465","url":null,"abstract":"In the scenario of exo-atmospheric chasing game, a pursued vehicle needs to make an avoidance maneuver to evade the pursuit of a pursuing vehicle. Thus, it is very important to realize an intelligent recognition for the guidance behavior of the pursuing vehicle. Reinforced learning has the ability to achieve such an intelligent action. Among different approaches of reinforced learning, Temporal-Difference method uses a combinatory estimation from different temporal steps to determine the value function of an output policy, thus it statistically costs less training time than the Monte Carlo method. To use Temporal-Difference method to study the evader-pursuit problem, it is necessary to map a continuous state space into a limited number of discrete states. With the application of Temporal-Difference reinforced learning to the problem, an ordinal position based nonlinear normalization method is proposed to convert the continuous state vector and control vector into a discrete form, such that a new method called augmented Temporal-Difference reinforced learning method is created. Simulation results demonstrate the effectiveness of this augmented temporal difference method.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132007130","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: 1

Optimization of Aero-engine H-infinity Robust Controller Based on Quantum Genetic Algorithm 基于量子遗传算法的航空发动机h -∞鲁棒控制器优化

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522430

Meng Zhang, Linfeng Gou, Zongting Jiang, Chujia Sun

引用次数: 0

Research on Three-Impulsive Approach for Satellite Formation Reconfiguration in Near Circular Orbit 近圆轨道卫星编队重构的三脉冲方法研究

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522369

Xingchu Liu, Danhe Chen, Kunxu Wu, W. Liao, Xiang Zhang

{"title":"Research on Three-Impulsive Approach for Satellite Formation Reconfiguration in Near Circular Orbit","authors":"Xingchu Liu, Danhe Chen, Kunxu Wu, W. Liao, Xiang Zhang","doi":"10.1109/ICMAE52228.2021.9522369","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522369","url":null,"abstract":"Micro/nano satellites have become the protagonists in most formation flying missions currently, there is an urgent demand to find an approach to quickly calculate multiple-impulsive scheme on board for relative orbital transfer, while considering the optimality of total impulsive consumption. This paper presents an optimal control approach based on multiple impulses for in-plane satellite formation reconfiguration in near circular orbit. A new type of relative orbit motion equation is established based on the initial small deviation in the cylindrical coordinates system in this paper, which is suitable to calculate the solution of relative orbital maneuver by means of multiple impulses. The formation reconfiguration problem is investigated on account of the relative orbit motion, and the orbital motion equations with initial deviations are presented. The formation reconfiguration problem in orbital plane is discussed and analyzed selectively. An optimal three-impulsive approach for relative orbital transfer in plane is obtained by analysis solution based on graphical and numerical way, which is achieved by the combination method from four-impulsive solution. And the method is proved to be effectivity and optimality.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126915460","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

Tool Wear of WC-Co-Based Cemented Carbide in External Thread Turning of Super Heat-resistant Alloy Inconel 718 with High-Pressure Coolant Supply 高压冷却液下超耐热合金Inconel 718外螺纹车削中wc - co基硬质合金刀具磨损

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522396

T. Wada, S. Enoki

{"title":"Tool Wear of WC-Co-Based Cemented Carbide in External Thread Turning of Super Heat-resistant Alloy Inconel 718 with High-Pressure Coolant Supply","authors":"T. Wada, S. Enoki","doi":"10.1109/ICMAE52228.2021.9522396","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522396","url":null,"abstract":"Super heat-resistant alloy Inconel 718, which is a component of gas turbines and aircraft engines, is difficult to cut. Many researches have been conducted on tool wear in high nickel alloy cutting. Conventionally, when cutting a work material with poor thermal conductivity, it is effective to decrease the cutting speed, prolong the tool life, and use a tool material with high thermal conductivity. High-pressure coolant cutting is effective for reducing the cutting temperature, and many studies on high-pressure coolant cutting have been conducted. In this study, super heat-resistant alloy Inconel 718 was screw thread turned with high-pressure coolant supply, and the tool wear was experimentally investigated. The cutting materials used was an un-coated ISO K10 cemented carbide. The \"VNl,\" \"VC\" and \"VNr\" were measured, where the \"VNl,\" \"VC\" and \"VNr\" were the maximum values of flank wear widths on the left side of the flank face, on the corner side of the flank face and on the right side of the flank face, respectively. The following results were obtained: (1) In the case of a cutting speed of 1.00 m/s, fracture of cutting part was observed in the conventional coolant supply. It was possible to suppress the tool wear with pressure coolant supply. (2) In the case of a cutting speed of 1.00 m/s, comparing the \"VNr,\" \"VC \" and \"VNl,\" \"VC\" was the smallest at any coolant pressure, and the \"VC\" decreased with the increase of the coolant pressure \"P.\" Furthermore, the \"VNr\" and \"VNl\" decreased with the increase of the coolant pressure. (3) In the case of a cutting speed of 1.50 m/s, as compared among the \"VNr,\" \"VC\" and \"VNl,\" \"VC\" was the smallest at any coolant pressure, and the \"VC\" decreased with the increase of the coolant pressure.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116634518","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: 1

Design and Simulation of a Rover CanSat Non-pneumatic Wheel: Preliminary Study for a Certain Test Obstacle Path 漫游者CanSat非气动轮的设计与仿真:某测试障碍路径的初步研究

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522526

Johan Joseph Nuñez-Quispe

{"title":"Design and Simulation of a Rover CanSat Non-pneumatic Wheel: Preliminary Study for a Certain Test Obstacle Path","authors":"Johan Joseph Nuñez-Quispe","doi":"10.1109/ICMAE52228.2021.9522526","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522526","url":null,"abstract":"The present research work develops the dynamic and structural simulation and design of a non-pneumatic wheel made of rigid neoprene rubber of a CanSat Rover for exploration and navigation in the 3D model path with different obstacles, in order to simulate the most precise interaction possible with the use of Computer-Aided Engineering (CAE) simulation. The wheel design was inspired by honeycombs arrays and auxetic structures, so the current design provides some characteristics needed to pass obstacles easily, low weight prototypes and even have a better response against falls and abrupt bounces during exploration tasks typical of Rover CanSat robots oriented to aerospace education. The analysis will focus on evaluating and characterizing the wheel in terms of the kinetic and potential energy, accelerations, speeds and angular displacement that are generated in the wheel when passing through a rocky area. Besides, we carried out a structural simulation of the wheel which allowed to obtain deformations and Von Misses stress zones at different forces on the wheel.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129462995","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: 3

A Coupled Electromagnetic-Mechanical Analysis Model for Inductive Repulsion System with Circular Coils 圆形线圈电感斥力系统的电磁-力学耦合分析模型

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522580

Zhang Ying, Shen Dandan

引用次数: 0

Development of an Optimisation Tool for the Mechanical Design of Permanent Magnet Rotors in High-Speed Electric Machines 高速电机永磁转子机械设计优化工具的研制

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522546

Levi Mallin, S. Barrans

引用次数: 0

Research on the Influence of Different Installation Positions of Blade Tip Winglets on the Flow Field of a Transonic Compressor Rotor 叶尖小翼不同安装位置对跨声速压气机转子流场影响的研究

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522474

Yang Ji-bo, Chu Wu-li, Zhang Sha

{"title":"Research on the Influence of Different Installation Positions of Blade Tip Winglets on the Flow Field of a Transonic Compressor Rotor","authors":"Yang Ji-bo, Chu Wu-li, Zhang Sha","doi":"10.1109/ICMAE52228.2021.9522474","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522474","url":null,"abstract":"In order to study the effect of the blade tip winglet and its installation position on the compressor performance, the transonic axial compressor rotor NASA Rotor37 was used as the research object, and the original rotor and 4 different blade tip winglet rotors with different installation positions were studied by numerical simulation method. The results show that each configuration can improve its stability margin while ensuring the efficiency of the rotor. Among them, the suction side trailing edge winglet has the best stabilization effect, and the margin improvement can reach 4.93%; the pressure side leading edge winglet has the worst stabilization effect, and the margin improvement is 4.5%; the stabilization effect of the pressure side trailing edge winglet and the suction side leading edge winglet is between the two. It is revealed that, to improve the stability margin of the rotor, the leading edge winglet inhibits the separation of the boundary layer, while the trailing edge winglet controls the accumulation of low-velocity fluid in the passage by weakening the degree of leakage vortex breakdown.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128260143","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

Load-dependent Friction Laws of Three Models of Harmonic Drive Gearboxes Identified by Using a Force Transfer Diagram 用力传递图识别三种谐波传动齿轮箱的载荷相关摩擦规律

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522368

Ponce Quiroga Carlos Wilfrido, A. Gabriel, Antoine Jean-Francois, Raharijaona Thibaut, Garrec Philippe

引用次数: 1

Numerical Analysis of Magnetic and Plasma Characteristics of the DC Ring Cusp Discharge Ion Thruster 直流环形尖峰放电离子推力器磁性和等离子体特性的数值分析

2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2021-07-16 DOI: 10.1109/ICMAE52228.2021.9522412

Naveen Deshan Ranasinghe, R. Wijesiriwardana

{"title":"Numerical Analysis of Magnetic and Plasma Characteristics of the DC Ring Cusp Discharge Ion Thruster","authors":"Naveen Deshan Ranasinghe, R. Wijesiriwardana","doi":"10.1109/ICMAE52228.2021.9522412","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522412","url":null,"abstract":"Electric propulsion systems are developed as efficient satellite propulsion systems over the years. In the electric propulsion arena, three main thruster models can be seen in worldwide space applications. They are electrothermal, electrostatic, and electromagnetic thrusters. Direct Current (DC) ring cusp discharge ion thruster is an electrostatic class ion thruster. It is also highly anticipated that ion thruster’s collective thrust in space will lead to space explorations. This study mainly focuses on the numerical analysis of the magnetic and plasma characteristics of DC ring cusp discharge ion thruster. In the numerical model, basic concepts of ion thruster were presented with magnetic and plasma characteristics, performance and heavier species characteristics, and the variation of plasma density with, node voltage, pressure, grid perforation, and the magnetic field. The magnetic characteristics of the ion thruster were modeled using two dimensional (2D) axisymmetric model with three magnetic rings. In addition, a three-dimensional (3D) revolution model is also presented to investigate the full-scale ion thruster. Also, the plasma characteristics including ion densities were analyzed using finite element numerical, 2D fluid axisymmetric model, and 3D revolution model to evaluate the ion distributions.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123066056","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