Journal of the Korea Institute of Military Science and Technology最新文献_第5页

LOS Stabilization Controller Design of EOTS and Performance Prediction Using Disturbance Model EOTS的LOS镇定控制器设计及扰动模型性能预测

Journal of the Korea Institute of Military Science and Technology Pub Date : 2023-02-05 DOI: 10.9766/kimst.2023.26.1.072

Hong-Bin Kim, Solyi Han, J. Jang, Kibeom Song

引用次数: 0

A Study on Transport and Dispersion of Chemical Agent According to Lagrangian Puff and Particle Models in NBC_RAMS 基于拉格朗日泡芙和粒子模型的化学剂在NBC_RAMS中的输运和分散研究

Journal of the Korea Institute of Military Science and Technology Pub Date : 2023-02-05 DOI: 10.9766/kimst.2023.26.1.102

Hyeyun Ku, J. Seo, Hyunwoo Nam

{"title":"A Study on Transport and Dispersion of Chemical Agent According to Lagrangian Puff and Particle Models in NBC_RAMS","authors":"Hyeyun Ku, J. Seo, Hyunwoo Nam","doi":"10.9766/kimst.2023.26.1.102","DOIUrl":"https://doi.org/10.9766/kimst.2023.26.1.102","url":null,"abstract":"This research mainly focuses on the transport and dispersion of chemical agent plume according to the Lagrangian Puff Model and Lagrangian Particle Model of NBC_RAMS(Nuclear, Biological, Chemical Reporting And Modeling S/W System). NBC_RAMS was developed with the purposes of estimating the fate of Chemical, Biological, and Radioactive(CBR) agent plumes and evaluating damages in the Republic of Korea. First, it calculates the local weather pattern, i.e. wind speed, wind direction, and temperature, by considering the effects of land uses and topography. The plume behaviors are calculated by adopting the Lagrangian Puff Model(LPFM) or Lagrangian Particle Model(LPTM). In this research, we assumed a virtual chemical agent exposure event in a stable atmospheric condition during the summer season. The plume behaviors were estimated by both LPFM and LPTM on the used area(urbanized and dry area) and the agricultural land. The higher heat flux in the used area led to stronger winds and further downward movement moving of the chemical agent than the farmland. The lateral dispersion of the chemical plume was emphasized in the Lagrangian Puff Model because it adopted Gaussian distribution.","PeriodicalId":17292,"journal":{"name":"Journal of the Korea Institute of Military Science and Technology","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88578359","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

Application of Recurrent Neural-Network based Kalman Filter for Uncertain Target Models 基于递归神经网络的卡尔曼滤波在不确定目标模型中的应用

Journal of the Korea Institute of Military Science and Technology Pub Date : 2023-02-05 DOI: 10.9766/kimst.2023.26.1.010

Dongbeom Kim, Dae-Kyo Jeong, Jaehyuk Lim, Sawon Min, Jun Moon

{"title":"Application of Recurrent Neural-Network based Kalman Filter for Uncertain Target Models","authors":"Dongbeom Kim, Dae-Kyo Jeong, Jaehyuk Lim, Sawon Min, Jun Moon","doi":"10.9766/kimst.2023.26.1.010","DOIUrl":"https://doi.org/10.9766/kimst.2023.26.1.010","url":null,"abstract":"For various target tracking applications, it is well known that the Kalman filter is the optimal estimator(in the minimum mean-square sense) to predict and estimate the state(position and/or velocity) of linear dynamical systems driven by Gaussian stochastic noise. In the case of nonlinear systems, Extended Kalman filter(EKF) and/or Unscented Kalman filter(UKF) are widely used, which can be viewed as approximations of the(linear) Kalman filter in the sense of the conditional expectation. However, to implement EKF and UKF, the exact dynamical model information and the statistical information of noise are still required. In this paper, we propose the recurrent neural-network based Kalman filter, where its Kalman gain is obtained via the proposed GRU-LSTM based neural-network framework that does not need the precise model information as well as the noise covariance information. By the proposed neural-network based Kalman filter, the state estimation performance is enhanced in terms of the tracking error, which is verified through various linear and nonlinear tracking problems with incomplete model and statistical covariance information.","PeriodicalId":17292,"journal":{"name":"Journal of the Korea Institute of Military Science and Technology","volume":"283 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76837987","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

A Study on the Flight Safety Analysis of Military Aircraft External Stores 军用飞机外挂飞行安全分析研究

Journal of the Korea Institute of Military Science and Technology Pub Date : 2023-02-05 DOI: 10.9766/kimst.2023.26.1.083

Hyeonsoo Kim, Minsu Kim, Byung-joon Shin, Y. Jo

{"title":"A Study on the Flight Safety Analysis of Military Aircraft External Stores","authors":"Hyeonsoo Kim, Minsu Kim, Byung-joon Shin, Y. Jo","doi":"10.9766/kimst.2023.26.1.083","DOIUrl":"https://doi.org/10.9766/kimst.2023.26.1.083","url":null,"abstract":"The external store fitted to the aircraft may affect the flight characteristics and flight safety of the aircraft, which requires the analyses and testing on it. The purpose of this study is to identify and analyze types of failures that can affect the flight safety of aircraft due to the installation of external stores, and to check the flight safety of aircraft through dropping tests of the external stores. After identifying the types of failures that could affect the flight safety of the aircraft, the criticality was calculated to analyze the effect on the flight safety of the aircraft. Four types of failures were selected: unintentional dropping, failure of dropping, unintentional main wing deployment, and release of tail wing restraint of the external store, which are considered to affect the flight safety of the aircraft due to the operation of the external store. As a result of the aircraft's flight safety analysis on the failure types, the criticality requirements were met. Based on this, after obtaining the airworthiness certification, the drop test was successfully performed to confirm the flight safety of the aircraft by mounting an external store on the aircraft. However, in addition to the four hazards carried out in this study, the real external stores of the military aircraft may have various factors affecting the flight safety of the aircraft, so further research will be needed.","PeriodicalId":17292,"journal":{"name":"Journal of the Korea Institute of Military Science and Technology","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74781705","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

Development of VHF-Band Conformal Antenna for UAV Mounting 无人机安装用甚高频共形天线的研制

Journal of the Korea Institute of Military Science and Technology Pub Date : 2023-02-05 DOI: 10.9766/kimst.2023.26.1.054

Euntae Jung, Juhyun Lee, Jin-Hyun Park, Byunggil Yu, Kichul Kim, Jaesoo Jung

引用次数: 0

Camouflaged Adversarial Patch Attack on Object Detector 对目标检测器的伪装对抗补丁攻击

Journal of the Korea Institute of Military Science and Technology Pub Date : 2023-02-05 DOI: 10.9766/kimst.2023.26.1.044

Jeong-Soo Kim, Hunmin Yang, Se-Yoon Oh

引用次数: 1

Target Tracking based on Kernelized Correlation Filter Using MWIR and SWIR Sensors 基于核相关滤波器的MWIR和SWIR传感器目标跟踪

Journal of the Korea Institute of Military Science and Technology Pub Date : 2023-02-05 DOI: 10.9766/kimst.2023.26.1.022

Sun-Gu Sun, Yu-Ra Lee, Daekyo Seo

引用次数: 0

Squib Ignition and Status Check Circuits Design for Compact Embedded Systems in Guided Missiles 制导导弹中小型嵌入式系统的哑炮点火和状态检测电路设计

Journal of the Korea Institute of Military Science and Technology Pub Date : 2023-02-05 DOI: 10.9766/kimst.2023.26.1.064

W. Kim, K. Ahn, M. Lee

引用次数: 0

Fatigue Life Prediction for the Skin Structures of Aircraft Sensor Pod Under Acoustic Load with Mean Stress 平均应力声载荷下飞机传感器吊舱蒙皮结构疲劳寿命预测

Journal of the Korea Institute of Military Science and Technology Pub Date : 2023-02-05 DOI: 10.9766/kimst.2023.26.1.001

Min-Hyeok Jeon, Yeonyong Kim, Hyunjoong Cho, Mi-Yeon Lee, Inkyom Kim, Han-Kyul Lee, Jae Myung Cho, J. Bae, K. Park

{"title":"Fatigue Life Prediction for the Skin Structures of Aircraft Sensor Pod Under Acoustic Load with Mean Stress","authors":"Min-Hyeok Jeon, Yeonyong Kim, Hyunjoong Cho, Mi-Yeon Lee, Inkyom Kim, Han-Kyul Lee, Jae Myung Cho, J. Bae, K. Park","doi":"10.9766/kimst.2023.26.1.001","DOIUrl":"https://doi.org/10.9766/kimst.2023.26.1.001","url":null,"abstract":"The skin structure of sensor pod mounted on the exterior of aircraft can be exposed to the acoustic dynamic load and static load such as aerodynamic pressure and inertial load during flight. Fatigue life prediction of structural model under acoustic load should be performed and also differential stiffness of model modified by static load should be considered. The acoustic noise test spectrum of MIL-STD-810G was applied to the structural model and the stress response power spectral density (PSD) was calculated. The frequency response analysis was performed with or without prestress induced by inplane static load, and the response spectrum was compared. Time series data was generated using the calculated PSD, and the time and frequency domain fatigue life were predicted and compared. The variation of stress response spectrum due to static load and predicted fatigue life according to the different structural model considering mean stress were examined and decreasing fatigue life was observed in the model with prestress of compressive static load.","PeriodicalId":17292,"journal":{"name":"Journal of the Korea Institute of Military Science and Technology","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87002593","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

A Study on the Flight Safety Analysis of Military Aircraft External Stores 军用飞机外挂飞行安全分析研究

Journal of the Korea Institute of Military Science and Technology Pub Date : 2023-02-05 DOI: 10.9766/kimst.2023.26.1.83

Hyeonsoo Kim, Minsu Kim, Byungjoon Shin, Younghee Jo

{"title":"A Study on the Flight Safety Analysis of Military Aircraft External Stores","authors":"Hyeonsoo Kim, Minsu Kim, Byungjoon Shin, Younghee Jo","doi":"10.9766/kimst.2023.26.1.83","DOIUrl":"https://doi.org/10.9766/kimst.2023.26.1.83","url":null,"abstract":"The external store fitted to the aircraft may affect the flight characteristics and flight safety of the aircraft, which requires the analyses and testing on it. The purpose of this study is to identify and analyze types of failures that can affect the flight safety of aircraft due to the installation of external stores, and to check the flight safety of aircraft through dropping tests of the external stores. After identifying the types of failures that could affect the flight safety of the aircraft, the criticality was calculated to analyze the effect on the flight safety of the aircraft. Four types of failures were selected: unintentional dropping, failure of dropping, unintentional main wing deployment, and release of tail wing restraint of the external store, which are considered to affect the flight safety of the aircraft due to the operation of the external store. As a result of the aircraft's flight safety analysis on the failure types, the criticality requirements were met. Based on this, after obtaining the airworthiness certification, the drop test was successfully performed to confirm the flight safety of the aircraft by mounting an external store on the aircraft. However, in addition to the four hazards carried out in this study, the real external stores of the military aircraft may have various factors affecting the flight safety of the aircraft, so further research will be needed.","PeriodicalId":17292,"journal":{"name":"Journal of the Korea Institute of Military Science and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134976709","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