Journal of Aerospace Technology and Management最新文献_第5页

Evaluation of Conversion Coatings Without Hexavalent Chromium for Aerospace and Defense Applications 航空航天和国防用无六价铬转化涂料的评价

Journal of Aerospace Technology and Management Pub Date : 2022-01-01 DOI: 10.1590/jatm.v14.1248

Gregory Morose, D. Pinsky, Chandler Humphrey, Kent DeFranco

{"title":"Evaluation of Conversion Coatings Without Hexavalent Chromium for Aerospace and Defense Applications","authors":"Gregory Morose, D. Pinsky, Chandler Humphrey, Kent DeFranco","doi":"10.1590/jatm.v14.1248","DOIUrl":"https://doi.org/10.1590/jatm.v14.1248","url":null,"abstract":"Conversion coatings containing hexavalent chromium are currently used in aerospace and defense manufacturing on various aluminum alloys to provide corrosion protection and enhanced adhesion of subsequent coatings. However, hexavalent chromium is toxic to humans with negative health effects from acute and chronic exposure. Regulatory mandates have accelerated a global effort to replace hexavalent chromium-containing materials because of their toxicity. A consortium was established to evaluate safer conversion coating materials, including the chemical processing of the surfaces prior to applying the conversion coatings. Four conversion coatings without hexavalent chromium were compared against a hexavalent chromium-based conversion coating for the following tests: coating weight, electrical contact resistance, paint adhesion, bare and painted neutral salt fog corrosion tests, painted SO2 salt fog corrosion test, and painted outdoor beachfront corrosion test. The test results for the four conversion coatings without hexavalent chromium were encouraging since several candidates exceeded some of the specification requirements or consortium expectations. In particular, the Socosurf TCS/PACS conversion coating performed well in the coating weight, electrical contact resistance, paint adhesion, and corrosion tests. The results of this evaluation provide significant progress toward providing a replacement material for a traditionally hexavalent chromium material application on aluminum.","PeriodicalId":14872,"journal":{"name":"Journal of Aerospace Technology and Management","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67185465","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: 2

Geometric Analysis of Small Wind Turbine Blades Manufactured by Additive Manufacturing 增材制造小型风力发电机叶片的几何分析

Journal of Aerospace Technology and Management Pub Date : 2022-01-01 DOI: 10.1590/jatm.v14.1252

H. Porto, C. Fortulan, A. Porto, R. H. Tsunaki

引用次数: 1

Evaluating an Aircraft Response to Disturbances Caused by Vibration Frequency of Wind Forces During Landing 飞机对着陆时风力振动频率扰动的响应评估

Journal of Aerospace Technology and Management Pub Date : 2022-01-01 DOI: 10.1590/jatm.v14.1261

D. Yadav, P. Kannan, S. Mansor

引用次数: 1

BowTie Methodology for the Risk Management of the Spin Maneuver During Flight Training in Brazil 巴西飞行训练中旋转机动风险管理的领结方法

Journal of Aerospace Technology and Management Pub Date : 2022-01-01 DOI: 10.1590/jatm.v14.1268

Ivan Resende Leitão, D. D. Andrade, Marcelo Soares Leão, Pedro Allan Giglio Sarkis

引用次数: 1

Evaluation of Strategies for Aeronautical Value Chains and the Implications to the State of Ceará, Brazil 航空价值链战略评估及其对巴西塞埃尔<e:1>州的影响

Journal of Aerospace Technology and Management Pub Date : 2022-01-01 DOI: 10.1590/jatm.v14.1287

Henrique Halisson Evangelista Gomes, D. de Andrade, L. Urbina, Hugo Santana de Figueirêdo Junior

引用次数: 0

Design of the Missile Attitude Controller Based on the Active Disturbance Rejection Control 基于自抗扰控制的导弹姿态控制器设计

Journal of Aerospace Technology and Management Pub Date : 2022-01-01 DOI: 10.1590/jatm.v14.1255

Shanzhong Liu, Mengqi Xue, Yaolong Qiu, Xingyu Zhou, Qing Zhao

{"title":"Design of the Missile Attitude Controller Based on the Active Disturbance Rejection Control","authors":"Shanzhong Liu, Mengqi Xue, Yaolong Qiu, Xingyu Zhou, Qing Zhao","doi":"10.1590/jatm.v14.1255","DOIUrl":"https://doi.org/10.1590/jatm.v14.1255","url":null,"abstract":"Targeting at the stable tracking control problem of the interceptor missile’s flight attitude in the terminal guidance phase, the nonlinear mathematical model of missile attitude is used as the research object, in which the coupling among the channels is considered. The control strategies of Proportion Differentiation (PD) control, nonlinear and linear active disturbance rejection control are studied. Firstly, the expanded state observer is designed to estimate the total disturbance information in real time, and the error feedback controller is designed to provide disturbance compensation, so that the original second-order nonlinear system is decoupled into the canonical form of cascade integrators to realize the stable tracking control of the missile attitude. Secondly, the three-channel coupling closed-loop control system model is established, and under the influence of external disturbance and model parameter perturbation, the comparison between the three control methods is demonstrated by simulations. The simulation results show that these three methods can stabilize the missile attitude and track the reference input signal. Among them, the nonlinear active disturbance rejection control has the smallest overshoot, the strongest anti-interference ability, and better robustness.","PeriodicalId":14872,"journal":{"name":"Journal of Aerospace Technology and Management","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67186089","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: 4

Analysis of Automation Mode Confusion with Brazilian Airline Pilots 巴西航空公司飞行员自动化模式混淆分析

Journal of Aerospace Technology and Management Pub Date : 2022-01-01 DOI: 10.1590/jatm.v14.1280

Leonardo Maximiliano Albano, J. Fregnani, D. de Andrade

引用次数: 0

Presentation 演讲

Journal of Aerospace Technology and Management Pub Date : 2022-01-01 DOI: 10.1590/jatm.v14.1274

Donizeti de Andrade, Joana Ramos Ribeiro, E. Njoya

引用次数: 0

Intelligence and Airport Security: A SWOT Analysis of the Brazilian Scenario 情报和机场安全:巴西情景的SWOT分析

Journal of Aerospace Technology and Management Pub Date : 2022-01-01 DOI: 10.1590/jatm.v14.1275

David Medeiros Oliveira, D. de Andrade, Arthur Monteiro

引用次数: 0

Comparison between Performance Requirements for Certification and Performance Requirements for Operation of Transport Category Rotorcraft 认证性能要求与运输类旋翼机运行性能要求的比较

Journal of Aerospace Technology and Management Pub Date : 2022-01-01 DOI: 10.1590/jatm.v14.1281

Clementino Rodrigues Veras Neto, D. de Andrade

引用次数: 1