International Journal of Micro Air Vehicles最新文献_第5页

Assessment of 3D-printed span change structures applied to small unmanned aerial vehicles 3D打印跨度变化结构在小型无人机上的应用评估

IF 1.4 4区工程技术

International Journal of Micro Air Vehicles Pub Date : 2021-01-01 DOI: 10.1177/1756829321992139

T. Henry, J. Hrynuk, F. Phillips

引用次数: 5

Investigation on aerodynamic characteristics of bionic membrane nano rotor 仿生膜纳米转子气动特性研究

IF 1.4 4区工程技术

International Journal of Micro Air Vehicles Pub Date : 2021-01-01 DOI: 10.1177/17568293211043304

Shanyong Zhao, Zhen Liu, K. Lu, Dacheng Su, Shangjing Wu

{"title":"Investigation on aerodynamic characteristics of bionic membrane nano rotor","authors":"Shanyong Zhao, Zhen Liu, K. Lu, Dacheng Su, Shangjing Wu","doi":"10.1177/17568293211043304","DOIUrl":"https://doi.org/10.1177/17568293211043304","url":null,"abstract":"In this paper, the bionic membrane structure is introduced to improve the aerodynamic performance of nano rotor at the low Reynolds number. The aerodynamic characteristics of nano rotor made of hyperelastic material as membrane blades are studied. Firstly, based on the hyperelastic constitutive model, a finite element model of the rotor is established and compared with the results of the modal test to verify the accuracy of the model. Then the computational fluid dynamics model of membrane nano rotor is established which combined with the finite element model. The aerodynamic characteristics of the membrane rotor under hovering conditions are studied using fluid–structure interaction method. It is found that the calculation results matched well with the experiment results. The design of the structural parameters such as the membrane proportion, shape, and position of the membrane rotor is optimized. The influence of each parameter on the aerodynamic performance of the rotor is obtained. Under certain structural conditions, the performance can be effectively improved, which provides a new idea for the design of the nano rotor.","PeriodicalId":49053,"journal":{"name":"International Journal of Micro Air Vehicles","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47517762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic modeling, simulation, and parameter study of electric quadrotor system of Quad-Plane UAV in wind disturbance environment 风扰环境下四平面无人机电动四旋翼系统的动力学建模、仿真及参数研究

IF 1.4 4区工程技术

International Journal of Micro Air Vehicles Pub Date : 2021-01-01 DOI: 10.1177/17568293211022211

Fan Li, Wenqian Song, Binhe Song, Hang Zhang

{"title":"Dynamic modeling, simulation, and parameter study of electric quadrotor system of Quad-Plane UAV in wind disturbance environment","authors":"Fan Li, Wenqian Song, Binhe Song, Hang Zhang","doi":"10.1177/17568293211022211","DOIUrl":"https://doi.org/10.1177/17568293211022211","url":null,"abstract":"Quad-Plane UAV(quadrotor fixed-wing hybrid vertical take-off and landing Unmanned Aerial Vehicle) is vulnerable to wind disturbance in quadrotor mode, and the performance of the electric quadrotor system directly affects its wind disturbance rejection performance. To study and optimize the wind disturbance rejection performance of the electric quadrotor system of Quad-Plane precisely and efficiently, a dynamic electric quadrotor simulation system integrating high-precision submodels of electric quadrotor system components is required. However, there are few papers on this kind of simulation system. This paper proposed a simulation system with both high computational efficiency and precision, and it can be used in optimization and flight simulation of Quad-Plane. The simulation system includes submodels of rotor, brushless direct current (BLDC) motor, electronic speed controller (ESC), and Li-ion Polymer battery. The surrogate-based rotor model is established to calculate the aerodynamic performance of the rotor in oblique flow. The BLDC motor performance calculation model considering inductance is presented and the power loss of the ESC is considered. The discharge characteristics of the battery are modeled considering the rate capacity effect. All submodels are validated and the simulation results show good agreements with test data. A flight test of Quad-Plane in quadrotor mode is conducted to validate the integrated dynamic simulation system. The results show that the simulation system has the advantages of high computational efficiency and precision. Based on the simulation system, the influence of the electric quadrotor system parameters on the performance of the electric quadrotor system, and furthermore on the wind disturbance rejection performance of the Quad-Plane are found, the conclusions are helpful to the selection and optimization of the electric quadrotor system components.","PeriodicalId":49053,"journal":{"name":"International Journal of Micro Air Vehicles","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/17568293211022211","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47041750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Hear-and-avoid for unmanned air vehicles using convolutional neural networks 使用卷积神经网络的无人飞行器听和避

IF 1.4 4区工程技术

International Journal of Micro Air Vehicles Pub Date : 2021-01-01 DOI: 10.1177/1756829321992137

Dirk Wijnker, Tom van Dijk, M. Snellen, G. de Croon, C. De Wagter

{"title":"Hear-and-avoid for unmanned air vehicles using convolutional neural networks","authors":"Dirk Wijnker, Tom van Dijk, M. Snellen, G. de Croon, C. De Wagter","doi":"10.1177/1756829321992137","DOIUrl":"https://doi.org/10.1177/1756829321992137","url":null,"abstract":"To investigate how an unmanned air vehicle can detect manned aircraft with a single microphone, an audio data set is created in which unmanned air vehicle ego-sound and recorded aircraft sound are mixed together. A convolutional neural network is used to perform air traffic detection. Due to restrictions on flying unmanned air vehicles close to aircraft, the data set has to be artificially produced, so the unmanned air vehicle sound is captured separately from the aircraft sound. They are then mixed with unmanned air vehicle recordings, during which labels are given indicating whether the mixed recording contains aircraft audio or not. The model is a convolutional neural network that uses the features Mel frequency cepstral coefficient, spectrogram or Mel spectrogram as input. For each feature, the effect of unmanned air vehicle/aircraft amplitude ratio, the type of labeling, the window length and the addition of third party aircraft sound database recordings are explored. The results show that the best performance is achieved using the Mel spectrogram feature. The performance increases when the unmanned air vehicle/aircraft amplitude ratio is decreased, when the time window is increased or when the data set is extended with aircraft audio recordings from a third party sound database. Although the currently presented approach has a number of false positives and false negatives that is still too high for real-world application, this study indicates multiple paths forward that can lead to an interesting performance. Finally, the data set is provided as open access.","PeriodicalId":49053,"journal":{"name":"International Journal of Micro Air Vehicles","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1756829321992137","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46048862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Direct Numerical Simulations on the three-dimensional wake transition of flows over NACA0012 airfoil at Re = 1000 Re = 1000时NACA0012翼型三维尾迹转捩的直接数值模拟

IF 1.4 4区工程技术

International Journal of Micro Air Vehicles Pub Date : 2021-01-01 DOI: 10.1177/17568293211055656

T. Kouser, Y. Xiong, Dan Yang, Sai Peng

{"title":"Direct Numerical Simulations on the three-dimensional wake transition of flows over NACA0012 airfoil at Re = 1000","authors":"T. Kouser, Y. Xiong, Dan Yang, Sai Peng","doi":"10.1177/17568293211055656","DOIUrl":"https://doi.org/10.1177/17568293211055656","url":null,"abstract":"For micro air vehicles (MAV), the precise prediction of aerodynamic force plays an important role. The aerodynamic force of a comparative low Reynold number (Re) vehicle tends to be affected by the different flow modes. In this paper, the aerodynamic performance of a three-dimensional NACA0012 airfoil is studied numerically. A range of angles of attack (α) 0°−25° and Reynolds number 1000 is considered. Mean and fluctuating coefficients of aerodynamic forces around NACA0012 airfoil are analyzed for different wake modes. The difference of aerodynamic forces between two and three-dimensional simulations are compared. The results show that the wake remains steady two-dimensional for lower angles of attack. At α = 9°, Von Karman vortex pattern is noticed. Flow transition to three-dimensional as the angle of attack increases from α = 13°. 3D wake is found to be stable with parallel shedding mode for 14°-17°. However, these modes become finer with the gradual increase in angle of incidence. While, wake loses its three-dimensional stability to chaotic with gradual increment in angle of attack afterwards.","PeriodicalId":49053,"journal":{"name":"International Journal of Micro Air Vehicles","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47286139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Never landing drone: Autonomous soaring of a unmanned aerial vehicle in front of a moving obstacle 永不着陆的无人机：无人机在移动障碍物前自动飞行

IF 1.4 4区工程技术

International Journal of Micro Air Vehicles Pub Date : 2021-01-01 DOI: 10.1177/17568293211060500

Chris PL de Jong, B. Remes, Sunyou Hwang, C. De Wagter

{"title":"Never landing drone: Autonomous soaring of a unmanned aerial vehicle in front of a moving obstacle","authors":"Chris PL de Jong, B. Remes, Sunyou Hwang, C. De Wagter","doi":"10.1177/17568293211060500","DOIUrl":"https://doi.org/10.1177/17568293211060500","url":null,"abstract":"Increasing endurance is a major challenge for battery-powered aerial vehicles. A method is presented which makes use of an updraft around obstacles to decrease the power consumption of a fixed-wing unmanned aerial vehicle. A soaring flight controller has been developed that can autonomously soar while the unmanned aerial vehicle keeps its relative position to that of a moving object. Multiple simulations have been performed to analyse the limitations of the soaring controller under different conditions. The effect of a change in wind velocity and updraft has been analysed. The simulations showed that an increase in updraft decreases the energy consumption of the flight controller. An increase in wind velocity results in a higher updraft requirement, while a decrease in the wind velocity requires less updraft. The simulations achieved sustained flight at 0% throttle. The controller has been validated experimentally using the updraft generated by a moving ship. The practical, autonomous tests reduced the average throttle down to 4.5% in front of a ship. The method presented in this study achieved successful hovering flight using an energy control module for longitudinal positioning.","PeriodicalId":49053,"journal":{"name":"International Journal of Micro Air Vehicles","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43030415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Toward the design of dynamically similar artificial insect wings 动态相似人工昆虫翅膀的设计

IF 1.4 4区工程技术

International Journal of Micro Air Vehicles Pub Date : 2021-01-01 DOI: 10.1177/1756829321992138

Heidi E. Reid, Huimin Zhou, Miles Maxcer, Robert K. D. Peterson, Jia Deng, Mark A. Jankauski

引用次数: 6

User involvement before the development of an indoor RPAS for the creative industries 在为创意产业发展室内RPAS之前，用户的参与

IF 1.4 4区工程技术

International Journal of Micro Air Vehicles Pub Date : 2021-01-01 DOI: 10.1177/1756829321992140

Blanca de-Miguel-Molina, María de-Miguel-Molina, Virginia Santamarina-Campos, M. Segarra‐Oña

{"title":"User involvement before the development of an indoor RPAS for the creative industries","authors":"Blanca de-Miguel-Molina, María de-Miguel-Molina, Virginia Santamarina-Campos, M. Segarra‐Oña","doi":"10.1177/1756829321992140","DOIUrl":"https://doi.org/10.1177/1756829321992140","url":null,"abstract":"This paper presents user needs and preferences gathered prior to the development of an indoor remotely piloted air system. A literature review was carried out to analyse previous studies about the involvement of users in the design of indoor unmanned aerial vehicles. Subsequently, the results of these user needs obtained from three focus groups held in European countries (Belgium, Spain and United Kingdom) are presented here. Through a content analysis of the information obtained in the focus groups, 40 codes and 4 variables were defined and used to examine the differences between types of users and their previous experience with drones. The literature review gave support to the results obtained through users’ involvement in the features to be included in a new unmanned aerial vehicle. Non-parametric tests and qualitative comparative analysis were used to analyse the information gathered in the focus groups. The results revealed few differences between artists working in creative industries and drone operators working for the creative industries. These differences affected features such as detecting and avoiding obstacles, which requires the inclusion of sensors. In addition, previous experience with drones was found to be a sufficient condition to explain greater concerns over safety, ethical and security issues in indoor environments.","PeriodicalId":49053,"journal":{"name":"International Journal of Micro Air Vehicles","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1756829321992140","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43776936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of bio-inspired binocular UAV detection system based on improved STC algorithm of scale transformation and occlusion detection 基于尺度变换和遮挡检测STC改进算法的仿生双目无人机检测系统设计

IF 1.4 4区工程技术

International Journal of Micro Air Vehicles Pub Date : 2021-01-01 DOI: 10.1177/17568293211004846

Huajun Song, Yanqi Wu, Guangbing Zhou

引用次数: 3

Collision mechanism of unmanned aerial vehicles onto glass panels 无人机与玻璃板的碰撞机理

IF 1.4 4区工程技术

International Journal of Micro Air Vehicles Pub Date : 2021-01-01 DOI: 10.1177/17568293211060504

Youngjun Choi, Sang Eon Lee, Jae-wook Jung, Jung‐Wuk Hong

{"title":"Collision mechanism of unmanned aerial vehicles onto glass panels","authors":"Youngjun Choi, Sang Eon Lee, Jae-wook Jung, Jung‐Wuk Hong","doi":"10.1177/17568293211060504","DOIUrl":"https://doi.org/10.1177/17568293211060504","url":null,"abstract":"The international standards for safety glass design have been limited to the use of a soft body impactor representing a human body to estimate the accidental collision resistance. However, UAVs have recently emerged as a new collision source due to their increasingly widespread use. An evaluation protocol for UAV collision is required to secure the safety of the glass used for structural cladding. In this paper, the collision mechanism of unmanned aerial vehicles (UAVs) onto glass panels is investigated by conducting experiments. We evaluate the impact forces of UAV collision on the glass panels and verify the numerical simulations by comparing the resultant forces from the experiments. Using the verified numerical simulation, 72 different collision conditions (changing the impact angles and velocities, respectively) are modeled, including extreme collision conditions that could be infeasible in the real experiments under manual control. Through this study, complicated collision mechanisms are clarified and elucidated. Additionally, specific collision conditions that induce maximum and minimum threats are identified, which should assist the design of future structural cladding glass systems and the UAV operation discipline in urban areas.","PeriodicalId":49053,"journal":{"name":"International Journal of Micro Air Vehicles","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48218049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4