Journal of Navigation最新文献_第5页

NAV volume 75 issue 5 Cover and Front matter NAV第75卷第5期封面和封面

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-09-01 DOI: 10.1017/s0373463322000546

引用次数: 0

A study of the EGM2008 model of Earth's gravitational field 地球引力场的EGM2008模型研究

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-09-01 DOI: 10.1017/S0373463322000480

Don Koks

引用次数: 0

Virtual global positioning system construction approach for unmanned surface vessel based on Dempster–Shafer theory and broad learning framework 基于Dempster-Shafer理论和广义学习框架的无人水面舰艇虚拟全球定位系统构建方法

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-09-01 DOI: 10.1017/S0373463322000418

Chuang Zhang, Chunyan Cao, Kaihang Kang, Chen Guo, Muzhuang Guo

{"title":"Virtual global positioning system construction approach for unmanned surface vessel based on Dempster–Shafer theory and broad learning framework","authors":"Chuang Zhang, Chunyan Cao, Kaihang Kang, Chen Guo, Muzhuang Guo","doi":"10.1017/S0373463322000418","DOIUrl":"https://doi.org/10.1017/S0373463322000418","url":null,"abstract":"Abstract Integrated navigation systems made up of a strap-down inertial navigation system (SINS) and global positioning system (GPS) are increasingly being used to improve the position, speed, and attitude information of unmanned surface vessels (USV). However, a GPS outage could occur due to the dependence of GPS performance on the external environment and the number of available satellites. This study uses an innovative combination of Dempster–Shafer (DS) theory and broad learning (BL) method to design a SINS/GPS integrated navigation system. First, the velocity and position information derived from the SINS and their corresponding GPS were fused using DS fusion rules, while the SINS error was modelled using the BL method. A ‘virtual’ GPS was then designed using the proposed DS–BL approach to provide the speed and position information when the GPS signal was interrupted, thereby ensuring the continuous navigation of the USV. The results of both simulation and sea trial demonstrate that the proposed virtual GPS estimation approach is effective, and the navigational accuracy of the proposed method is superior to other methods.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48350391","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

NAV volume 75 issue 5 Cover and Back matter NAV第75卷第5期封面和封底

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-09-01 DOI: 10.1017/s0373463322000558

引用次数: 0

Attention-guided lightweight generative adversarial network for low-light image enhancement in maritime video surveillance 用于海上视频监控微光图像增强的注意力引导轻量级生成对抗网络

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-08-30 DOI: 10.1017/S0373463322000467

R. W. Liu, Nian Liu, Yanhong Huang, Yu Guo

{"title":"Attention-guided lightweight generative adversarial network for low-light image enhancement in maritime video surveillance","authors":"R. W. Liu, Nian Liu, Yanhong Huang, Yu Guo","doi":"10.1017/S0373463322000467","DOIUrl":"https://doi.org/10.1017/S0373463322000467","url":null,"abstract":"Abstract Benefiting from video surveillance systems that provide real-time traffic conditions, automatic vessel detection has become an indispensable part of the maritime surveillance system. However, high-level vision tasks generally rely on high-quality images. Affected by the imaging environment, maritime images taken under poor lighting conditions easily suffer from heavy noise and colour distortion. Such degraded images may interfere with the analysis of maritime video by regulatory agencies, such as vessel detection, recognition and tracking. To improve the accuracy and robustness of detection accuracy, we propose a lightweight generative adversarial network (LGAN) to enhance maritime images under low-light conditions. The LGAN uses an attention mechanism to locally enhance low-light images and prevent overexposure. Both mixed loss functions and local discriminator are then adopted to reduce loss of detail and improve image quality. Meanwhile, to satisfy the demand for real-time enhancement of low-light maritime images, model compression strategy is exploited to enhance images efficiently while reducing the network parameters. Experiments on synthetic and realistic images indicate that the proposed LGAN can effectively enhance low-light images with better preservation of detail and visual quality than other competing methods.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44869773","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

Sea current relative navigation using interacting multiple model filter with adaptive fading technique 基于自适应衰落技术的交互多模型滤波器的海流相对导航

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-08-22 DOI: 10.1017/S0373463322000431

Jaehyuck Cha, Jeong Ho Hwang, Chan-Gook Park

{"title":"Sea current relative navigation using interacting multiple model filter with adaptive fading technique","authors":"Jaehyuck Cha, Jeong Ho Hwang, Chan-Gook Park","doi":"10.1017/S0373463322000431","DOIUrl":"https://doi.org/10.1017/S0373463322000431","url":null,"abstract":"Abstract In this paper, we propose a sea current relative navigation method using an interacting multiple model (IMM) filter with adaptive fading technique that can compensate an inaccurate sea current dynamics model. Due to the marine environment, the underwater vehicles largely depend on inertial navigation. Unfortunately, since its performance deteriorates with time, it is usually aided by another sensor. An electromagnetic-log (EM-log) and a Doppler velocity log (DVL), which are mainly used in marine navigation, provide relative velocity measurements to the sea currents, and hence require an accurate sea current dynamics model to fully utilise them. However, it is difficult to reflect the actual sea current changes with just a single fixed model, resulting in degraded overall navigation performance. Therefore, this paper proposes an IMM filter that can use multiple sea current dynamics models and has sub-filters designed with adaptive fading extended Kalman filter (AFEKF) to compensate for the mismodelling of sea current dynamics. The method is verified by simulation and shows a performance improvement comparable to the optimal filter.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49614424","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

Use of pulsars for ship navigation: an alternative to the sextant 脉冲星在船舶导航中的应用：六分仪的替代品

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-08-22 DOI: 10.1017/S0373463322000297

Janusz Adamson

引用次数: 0

A novel pulsar-based template-independent navigation method 一种新的基于脉冲星的模板无关导航方法

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-08-17 DOI: 10.1017/S0373463322000303

Zhize Li, Wei Zheng, Yusong Wang

{"title":"A novel pulsar-based template-independent navigation method","authors":"Zhize Li, Wei Zheng, Yusong Wang","doi":"10.1017/S0373463322000303","DOIUrl":"https://doi.org/10.1017/S0373463322000303","url":null,"abstract":"Abstract Because of the high photon flux, the Crab nebula pulsar is widely used as the observation target for X-ray pulsar-based navigation. The built profile of the Crab pulsar will change over time, however, which means that the pre-calibrated template cannot be used for the long term. In this paper, a novel pulsar-based template-independent navigation method is proposed. The detected phase propagation model is given as a term of position of the vehicle, taking the orbital motion into account. A different method of time-of-arrival process between the recovered profiles is introduced. With the aid of orbital transition matrix, a measurement model is derived to be a term of velocity error of the vehicle varying with time. The state errors of the vehicle are transformed into velocity errors by performing multi-segment observations to achieve the navigation system observability. The navigation equations of the system are then established and can be solved directly. Some simulations are performed to verify the method and suggest that the proposed method is feasible, effective and easy to implement. The precise orbit information of the vehicle can be determined. The state estimation accuracy is basically consistent with the traditional filtering algorithms, and the computational cost is still very low.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46278899","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

A graph method of description of driving behaviour characteristics under the guidance of navigation prompt message 一种在导航提示信息引导下描述驾驶行为特征的图形方法

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-08-15 DOI: 10.1017/S0373463322000273

Liping Yang, Yang Bian, Xiaohua Zhao, Yiping Wu, Hao Liu, Xiaoming Liu

{"title":"A graph method of description of driving behaviour characteristics under the guidance of navigation prompt message","authors":"Liping Yang, Yang Bian, Xiaohua Zhao, Yiping Wu, Hao Liu, Xiaoming Liu","doi":"10.1017/S0373463322000273","DOIUrl":"https://doi.org/10.1017/S0373463322000273","url":null,"abstract":"Abstract To verify whether a graph is suitable for describing driver behaviour performance under the effects of navigation information, this study applies two types of prompt messages: simple and detailed. The simple messages contain only direction instructions, while the detailed messages contain distance, direction, road and lane instructions. A driving simulation experiment was designed to collect the empirical data. Two vehicle operating indicators (velocity and lateral offset), and two driver manoeuvre indicators (accelerator power and steering wheel angle) were selected, and T-test was used to compare the differences of behavioural performance. Driving behaviour graphs were constructed for the two message conditions; their characteristics and similarities were further analysed. Finally, the results of T-test of behavioural performance and similarity results of the driving behaviour graphs were compared. Results indicated that the two different types of prompt messages were associated with significant differences in driving behaviours, which implies that it is feasible to describe the characteristics of driving behaviours guided by navigation information using such graphs. This study provides a new method for systematically exploring the mechanisms affecting drivers’ response to navigation information, and presents a new perspective for the optimisation of navigation information.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49315498","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

Detection of maritime traffic anomalies using Satellite-AIS and multisensory satellite imageries: Application to the 2021 Suez Canal obstruction 使用卫星AIS和多传感器卫星图像检测海上交通异常：应用于2021年苏伊士运河阻塞

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-08-15 DOI: 10.1017/S0373463322000364

Ahmed Harun-Al-Rashid, Chanjun Yang, Dae-Woon Shin

引用次数: 3