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

{"title":"Research on the Braided Corrugated Hose Subjected to Axial Tension Considering Friction Between Braid and Bellows","authors":"Dacheng Huang, Yongqiang Lin, Jianrun Zhang","doi":"10.1109/ICMAE52228.2021.9522428","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522428","url":null,"abstract":"The numerical simulation of the braided corrugated hose is always researched without considering the metallic braided tube, making the results of the study not match the actual situation. To address the problem, the entire braided corrugated hose model is established, and the axial mechanical properties of braided corrugated hose are studied, while the effect of the metallic braided tube on the bellows is also considered. Main conclusions are as follows: the axial stiffness of the braided corrugated hose is non-linear, in the early stages, the deformation is mainly small displacements and the axial stiffness consists of metallic braided tube and bellows respectively, in the later stages, the axial stiffness consists mainly of the contact stiffness between braided tube and bellows. For the bellows, the maximum equivalent stress and strain occur in the area where contact with metallic braided tube, with a maximum stress of 1055MPa. The maximum contact pressure between the metallic braided tube and the bellows is 151.54MPa and the friction stress is 27.717MPa. It is found that the contact characteristic between the metallic braided tube and the bellows has a great influence on the axial mechanical properties of the braided corrugated hose by compared the relationship between the axial stiffness and contact pressure.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"7 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":"127511027","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}

{"title":"Analysis of the Influence of Wave Spectral Structure on the Sonic Boom Loudness of the NASA X-59 Low Boom Demonstrator","authors":"I. Bashkirov, V. S. Gorbovskoy, A. Kazhan, V. Kazhan, S. Chernyshev","doi":"10.1109/ICMAE52228.2021.9522371","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522371","url":null,"abstract":"Achieving an acceptable level of sonic boom over inhabited land is one of the main problems in the development of a new generation supersonic civil aircraft. In connection with the currently unsolved problem of selecting the metric that most adequately describes the impact of a sonic boom on people, animals, buildings and structures, it is relevant to analyze the influence of the overpressure distribution in the aircraft near field on the shape of the sonic boom signature on the ground. It is also of interest to determine the influence of signature shape on the ground on the sonic boom loudness in various metrics. In the present paper, the shape of the sonic boom wave for the NASA X-59 QueSST aerodynamic configuration considered within the framework of SBPW (Sonic Boom Prediction Workshop) was studied. The influence of the aerodynamic layout elements on the pressure distribution in the near field and the wave transformation during propagation to the ground are shown, a spectral analysis of the sonic boom signature on the ground is performed.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"111 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":"113959372","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}

{"title":"Numerical Optimization of Vacuum Assisted Manufacturing of Aircraft Composite Parts Using the Predictive Assessment of Objectives","authors":"S. Shevtsov, I. Zhilyaev, Jyun-Ping Huang, N. Snezhina","doi":"10.1109/ICMAE52228.2021.9522476","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522476","url":null,"abstract":"The vacuum assisted technologies of composite parts manufacturing are becoming very popular owing to their relative simplicity and inexpensive equipment. They are implemented in the production of aircrafts, rotorcrafts, ships, cars and wind turbine blades. Unfortunately, in many cases this technology does not provide sufficient repeatability and quality due to very high process sensitivity to its layout (number, dimensions and positions of the resin gates and vacuum vents) and the temperature. Due to the fact that process testing is very expensive and time-consuming, the use of vacuum infusion process simulation is relevant. Such modeling tools must be able to correctly predict resin spreading in the preform and identify potential defects. In contrast to the well-known software tools, we propose to use the phase field equation as the leading one and providing a more accurate reconstruction of the front of the moving resin. To describe the pressure distribution in an incompletely saturated porous preform, we use the Richards equation, and the state of the moving resin is modeled by the convection-diffusion equation with a source controlled by the autocatalytic equation. The formulation of a forward coupled modeling problem also includes modified relationships for the dependence of the resin viscosity on the degree of cure and temperature, as well as for the diffusion coefficient of the degree of cure when mixing streams of liquid resin. The article presents the results of modeling the vacuum infusion of a 3D preform at varying positions of the vacuum vent, high-permeability medium (HPM) tape and temperature. It is shown that the indicators of the quality and performance of the process at the moment of stopping of the resin spreading due to beginning of its gelation can be predicted at an early stage of simulation, which is very important for using the developed CAE model for the process optimization. The validity and reliability of such predictive estimate using the objectives and their combination, which are determined at an early stage of simulation, are discussed.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"16 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":"130702519","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}

{"title":"Intelligent Control of Manipulator Based on Deep Reinforcement Learning","authors":"Jiangtao Zhou, Hua Zheng, Dong-zhu Zhao, Yingxue Chen","doi":"10.1109/ICMAE52228.2021.9522377","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522377","url":null,"abstract":"Traditional manipulator control requires the establishment of complex models and mathematical equations, and requires manual adjustment of parameters, which cannot adapt to tasks and environmental changes. With the rapid development of artificial intelligence, deep reinforcement learning algorithms show strong online adaptability and self-learning capabilities for complex systems, and have gradually become one of the important research hotspots in the field of intelligent control and artificial intelligence in recent years. Therefore, this paper combines the deep reinforcement learning algorithm with the manipulator control system, and uses the deep deterministic policy gradient (DDPG) algorithm to achieve the end position control of the manipulator. On this basis, this paper presents a scheme to improve the reward function. Finally, the DDPG algorithm is used for interactive training with the manipulator model. The experimental results show that the deep reinforcement learning algorithm can realize the control of the manipulator, and the improved reward function scheme can greatly improve the stability of training and the task completion rate.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"48 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":"128847441","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}

{"title":"Multi-objective Layout Optimization of Aircraft Multi-branch Cable Harness Based on MOPSO/D","authors":"Dan Zhang, Zhaochao Liu, Chengye Zhou, D. Zuo","doi":"10.1109/ICMAE52228.2021.9522568","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522568","url":null,"abstract":"The routing of multi-branch cable harness in aircraft relies heavily on manual work and experience, which is highly time-consuming. In order to realize the automatic 3D layout of multi-branch cable harness, this paper presents a novel approach by solving the layout as a multi-objective optimization problem that is NP-hard. The optimization objectives are to minimize the weight of multi-branch cables, to maximize the proportion of main roads, and to maximize the openness of the wiring path. Various regulatory and functional design rules are considered to be constraints. And the number and spatial position of branch points are taken as decision variables. As a result, a multi-objective layout optimization problem model of multi-branch cable based on Steiner tree is established. Then an improved multi-objective particle swarm optimization based on decomposition (MOPSO/D) is proposed to obtain the Pareto solution set of multi-branch cable layout. Finally, the feasibility of the proposed method is verified by the cable layout of the aircraft cabin.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"31 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":"133636134","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}

{"title":"Verification of a Novel Electrospray Thruster with Magnetic Ionic liquid Propellant","authors":"Yang Yuntian, Liang Xiaokang, Guo Dawei, Cheng Mousen","doi":"10.1109/ICMAE52228.2021.9522375","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522375","url":null,"abstract":"A new concept of magnetic ionic liquid electrospray thruster(ILET) is proposed in this paper. The thruster uses a lower working voltage with the action of an applied magnetic field, and is named as low-voltage ionic liquid electrospray thruster(LV-ILET). A jet needle is used as the emitter and the Helmholtz coil is used to apply an external magnetic field to demonstrate the working principle of the LV-ILET. The experimental results show that the stable working voltage could be reduced to 87% of that in absence of an applied magnetic field. Under the same working voltage, the applied magnetic field can significantly increase the emission current of LV-ILET. Due to the linear relationship between the thrust and the emission current, LV-ILET can either reduce the working voltage or increase the thrust with the help of the applied magnetic field and the magnetization characteristics of the propellant.","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":"131047579","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}

{"title":"Development of a Fuel Test Bench with Changing the Position of the Test Object in the Current Time Mode","authors":"G. V., S. S., M. V, Z. I., S. I., Gapeev Y, Syrchenko N. V","doi":"10.1109/ICMAE52228.2021.9522545","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522545","url":null,"abstract":"This article considers the development of a fuel test bench for helicopter with changing the position of the test object in the current time mode. In order to create new models of aviation equipment it is necessary to perform ground tests, it is safe and saves time and money in comparison with flight tests. The test bench considered in this article consists of two rotary frames. Each frame has its own drive that drives that frame. All components of the system under test (fuel tanks, standard pumps, piping, and assemblies) mounted on the inner frame. Such configuration allows the stand to perform tests at two angles of rotation of the aircraft and can perform tests for most helicopter models. The article also describes the control system of the test bench and gives strength calculations of the rotary frames under the force impact of the test object on them.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"79 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":"132846657","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}

{"title":"Fractal Modeling of Gear Tooth Surface Profile and Research on Meshing Stiffness of Planetary Gear System with High-Power Density","authors":"Weijun Qiao, Jianrun Zhang","doi":"10.1109/ICMAE52228.2021.9522420","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522420","url":null,"abstract":"The high-power density planetary gear system is different from the traditional gear transmission system. It has higher gear performance indicators with a smaller volume and mass, which puts forward higher requirements for the stiffness of the gear. In such a situation, the gear tooth surface profile as a non-negligible factor will affect the meshing stiffness of the high-power density planetary gear system and thus affect the dynamics of the high-power density planetary gear system. Therefore, a proper modeling of the gear tooth surface profile is an important part of studying the dynamics of high-power density planetary gear systems. In this paper, fractal dimensions are used to represent different gear tooth surface profile, and the gear tooth surface profile is modeled based on fractal theory. On this basis, the time-varying meshing stiffness of the planetary gear system with high-power density is derived according to the Weber energy method. The influence of the fractal dimension on the time-varying meshing stiffness of the gear is studied, which provides the basis for the dynamic studies of the planetary gear system with high-power density.","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":"115404333","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}

{"title":"Influence of Dynamic Response Characteristics of Sensors on Measurement Results","authors":"Xiang Lyu, Xinyuan Zhou, Meng Zhang, Shipo Li, K. Liu, Taikun Wang","doi":"10.1109/ICMAE52228.2021.9522413","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522413","url":null,"abstract":"Dynamic response characteristics of the sensors have an important effect on the accuracy of measurement results. Relevant studies about the dynamic response characteristics of sensors are carried out, which are mainly concern with the first-order measurement device represented by thermocouple and the second-order measurement device represented by pressure sensor. For temperature measurement with thermocouple, the theoretical expression of time constant and the corresponding relationship between measurement error and time constant are derived. For the pressure sensor, the corresponding relationship between the measurement error and the natural frequency is derived also. Formulas obtained in this paper can be used as the guideline for sensor selection and measurement error estimation.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"327 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":"115767666","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}

{"title":"Catalytic Ignition Delay Investigation of Hybrid Rocket Motor Based on 90% Hydrogen Peroxide and Polyethylene","authors":"Zihao Guo, H. Tian, Zhang Yuanjun, Sheng Zhao","doi":"10.1109/ICMAE52228.2021.9522418","DOIUrl":"https://doi.org/10.1109/ICMAE52228.2021.9522418","url":null,"abstract":"This paper is aimed to analyze the effect of hybrid rocket motor catalyst bed efficiency on ignition delay through lab-scale firing tests and two-dimensional axisymmetric transient simulations. Catalytic ignition firing tests of hybrid rocket motor(HRM) with 90% hydrogen peroxide(90HP) and polyethylene(PE) propellant are studied. The equivalent catalytic temperature of 90HP is calculated during the monopropellant pressure buildup stage. In firing tests, the equivalent catalytic temperatures of 90HP are between 726K~941K. The ratio of the equivalent catalytic temperature to the theoretical catalytic temperature is similar to the efficiency of the consumed catalytic bed. The equivalent catalytic temperature of HP and the oxidizer mass flow rate will affect the ignition delay time. Corresponding simulation research has also been carried out. When the equivalent catalytic temperature of 90HP is 600K and 700K, the HRM cannot complete ignition. When the oxidizer flow rate is more than 200g/s, increasing the equivalent catalytic temperature of 90HP has a greater impact on the reduction of fuel grain heating time compared with increasing the oxidizer flow rate. Double exponential fitting is performed on fuel grain heating time, oxidizer flow rate and equivalent catalytic temperature of 90HP. The denominators of mox and THP in double exponential fitting differ by an order of magnitude.","PeriodicalId":161846,"journal":{"name":"2021 12th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"94 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":"124599758","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}