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A novel hybrid observation prediction methodology for bridging GNSS outages in INS/GNSS systems 一种新的混合观测预测方法，用于弥补INS/GNSS系统中的GNSS中断
IF 2.4 4区 工程技术
Journal of Navigation Pub Date : 2022-05-23 DOI: 10.1017/S037346332200025X
Linzhouting Chen, Zhanchao Liu, Jiancheng Fang
{"title":"A novel hybrid observation prediction methodology for bridging GNSS outages in INS/GNSS systems","authors":"Linzhouting Chen, Zhanchao Liu, Jiancheng Fang","doi":"10.1017/S037346332200025X","DOIUrl":"https://doi.org/10.1017/S037346332200025X","url":null,"abstract":"Abstract The integration of the inertial navigation system (INS) and global navigation satellite system (GNSS) is suited for localisation and navigation applications, such as aircrafts, land vehicles and ships. The primary challenge is for navigation system to achieve accurate and reliable navigation solution during GNSS outages. This paper presents an observation prediction methodology for INS/GNSS bridging GNSS outages, which combines partial least squares regression (PLSR) and Gaussian process regression (GPR) to model the INS/GNSS observations and enable a Kalman filter to estimate INS errors. The performance of proposed PLSR/GPR prediction methodology was validated through four GNSS outages taken on flight experiment data, including diverse manoeuvre conditions. The experiment results demonstrate that remarkable performance enhancements are achieved through applying the proposed PLSR/GPR prediction methodology into INS/GNSS integration.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47409144","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
Study on site selection for a cruise home port in the Yangtze River Delta region from the perspective of safety 基于安全视角的长三角邮轮母港选址研究
IF 2.4 4区 工程技术
Journal of Navigation Pub Date : 2022-05-23 DOI: 10.1017/S0373463322000169
Zhaoqian Su, Yingjie Xiao
{"title":"Study on site selection for a cruise home port in the Yangtze River Delta region from the perspective of safety","authors":"Zhaoqian Su, Yingjie Xiao","doi":"10.1017/S0373463322000169","DOIUrl":"https://doi.org/10.1017/S0373463322000169","url":null,"abstract":"Abstract To improve the safety of cruise tourism in the Yangtze River Delta region (YRD), a new cruise ship home port is needed. This paper studies the process for selection of a site for the new cruise home port. Through analysis of previous cases of cruise tourism safety accidents, it is found that the basic situation of the cruise port, such as the channel, the port, logistics support and scenic places to visit, is important to cruise operation safety. An index system of site selection for a cruise home port is established, and the optimal choice of location for a regional cruise home port – between Shanghai, Zhoushan and Nantong – is analysed by the analytic hierarchy process (AHP). The research shows that the order of preferred site for the cruise home port is Zhoushan, then Shanghai and, third, Nantong. This paper can provide a reference for the layout of the whole industry chain of the cruise economy in the YRD in the future. This will promote the integration of development of the YRD, and enhance the regional connectivity and policy system efficiency in the YRD.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43176573","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
Robust stereo visual odometry: A comparison of random sample consensus algorithms based on three major hypothesis generators 鲁棒立体视觉里程计:基于三种主要假设生成器的随机样本一致性算法的比较
IF 2.4 4区 工程技术
Journal of Navigation Pub Date : 2022-05-12 DOI: 10.1017/S0373463322000236
Guangzhi Guo, Zuoxiao Dai, Yuanfeng Dai
{"title":"Robust stereo visual odometry: A comparison of random sample consensus algorithms based on three major hypothesis generators","authors":"Guangzhi Guo, Zuoxiao Dai, Yuanfeng Dai","doi":"10.1017/S0373463322000236","DOIUrl":"https://doi.org/10.1017/S0373463322000236","url":null,"abstract":"Abstract Almost all robust stereo visual odometry work uses the random sample consensus (RANSAC) algorithm for model estimation with the existence of noise and outliers. To date, there have been few comparative studies to evaluate the performance of RANSAC algorithms based on different hypothesis generators. In this work, we analyse and compare three popular and efficient RANSAC schemes. They mainly differ in using the two-dimensional (2-D) data points measured directly and the three-dimensional (3-D) data points inferred through triangulation. This comparison presents several quantitative experiments intended for comparing the accuracy, robustness and efficiency of each scheme under varying levels of noise and different percentages of outlier conditions. The results suggest that in the presence of noise and outliers, the perspective-three-point RANSAC provides more accurate and robust pose estimates. However, in the absence of noise, the iterative closest point RANSAC obtains better results regardless of the percentage of outliers. Efficiency, in terms of the number of RANSAC iterations, is found in that the relative speed of the perspective-three-point RANSAC becomes superior under low noise levels and low percentages of outlier conditions. Otherwise, the iterative closest-point RANSAC may be computationally more efficient.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44982168","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: 1
A review of flight trajectory optimisations 飞行轨迹优化的回顾
IF 2.4 4区 工程技术
Journal of Navigation Pub Date : 2022-05-01 DOI: 10.1017/S0373463322000248
O. Pleter, C. Constantinescu
{"title":"A review of flight trajectory optimisations","authors":"O. Pleter, C. Constantinescu","doi":"10.1017/S0373463322000248","DOIUrl":"https://doi.org/10.1017/S0373463322000248","url":null,"abstract":"Abstract The paper reviews the optimisation methods of the flight trajectory for airliners. In contrast to maritime navigation, where the shortest route (the orthodrome) is preferred, in air navigation, the brachistochrone is the optimal flight trajectory on the sphere or on the ellipsoid, considering the wind vector field (maximising the tail wind and minimising the head wind over the duration of the flight). The major impact of the wind on the flight trajectory results from the possible significant velocity at the normal cruise flight levels, which could reach 200 kts, or 40% of the aircraft true airspeed (TAS). Brachistochrone is independent of the flight performance optimisation (range versus speed), as computed by the flight management system. Whichever cost index (CI) is selected (and consequently, the cruise Mach number), the brachistochrone is the minimum time of flight trajectory at that target Mach number. In cruise flight, the minimum time of flight is also equivalent to the minimum fuel consumption. It concerns just the wind velocity field. All these qualify the brachistochrone as the greenest trajectory, the most fuel and emissions efficient solution relative to the atmosphere. The paper classifies the brachistochrone problems (2D, 3D and 4D brachistochrones, with or without flexible time of departure). Some numerical examples are provided. The overall optimal 4D trajectory considers many aspects, including safety, by minimisation of total costs and risks of the 4D trajectory.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45742681","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 3 Cover and Back matter NAV第75卷第3期封面和封底
IF 2.4 4区 工程技术
Journal of Navigation Pub Date : 2022-05-01 DOI: 10.1017/s0373463322000388
{"title":"NAV volume 75 issue 3 Cover and Back matter","authors":"","doi":"10.1017/s0373463322000388","DOIUrl":"https://doi.org/10.1017/s0373463322000388","url":null,"abstract":"","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48915440","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 3 Cover and Front matter NAV第75卷第3期封面和封面
IF 2.4 4区 工程技术
Journal of Navigation Pub Date : 2022-05-01 DOI: 10.1017/s0373463322000376
{"title":"NAV volume 75 issue 3 Cover and Front matter","authors":"","doi":"10.1017/s0373463322000376","DOIUrl":"https://doi.org/10.1017/s0373463322000376","url":null,"abstract":"","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43413831","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 method to identify and rank objects and hazardous interactions affecting autonomous ships navigation 一种识别和排序影响自主船舶航行的物体和危险相互作用的方法
IF 2.4 4区 工程技术
Journal of Navigation Pub Date : 2022-05-01 DOI: 10.1017/S0373463322000121
V. Bolbot, G. Theotokatos, L. Wennersberg
{"title":"A method to identify and rank objects and hazardous interactions affecting autonomous ships navigation","authors":"V. Bolbot, G. Theotokatos, L. Wennersberg","doi":"10.1017/S0373463322000121","DOIUrl":"https://doi.org/10.1017/S0373463322000121","url":null,"abstract":"Abstract The Autonomous Navigation System (ANS) constitutes a critical key enabling technology required for operating Maritime Autonomous Surface Ships (MASS). To assure the safety of MASS operations, the effective identification of potential objects and target ships interacting with the own MASS is quintessential. This study proposes a systematic method to identify the items interacting with the own MASS. This method is based on a similar approach previously employed for the encountering items’ identification in robotics, which is customised herein for the MASS needs. The developed method is applied to a short-sea shipping MASS. The environmental features, agents and objects related to her navigation are identified and ranked based on the frequency of encounter and the potential collision consequences. The results demonstrate the ability of the method to identify additional items in comparison to Automatic Identification System based data. The interactions with the small ships are considered as the most critical, due to their potential accidental consequences and their exhibited high frequency of encounter. This study results are employed to support the ANS design and testing of the investigated ship.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45488216","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: 5
Effect of perception difference between first- and third-person perspectives on local and global situation recognition in ship handling 船舶操作中第一和第三人称视角感知差异对局部和全局态势识别的影响
IF 2.4 4区 工程技术
Journal of Navigation Pub Date : 2022-05-01 DOI: 10.1017/S0373463322000224
Yuki Kato, Tomoya Horiguchi
{"title":"Effect of perception difference between first- and third-person perspectives on local and global situation recognition in ship handling","authors":"Yuki Kato, Tomoya Horiguchi","doi":"10.1017/S0373463322000224","DOIUrl":"https://doi.org/10.1017/S0373463322000224","url":null,"abstract":"Abstract Remote monitoring and control systems are being used with more frequency, but the characteristics of situational awareness and decision-making from remote locations are largely unknown. Remote operators’ sources of information differ from on-board sources greatly in terms of perspective, field of view, and available data type (qualitative or quantitative). This study focused on clarifying the cognitive effects of first- and third-person perspectives on ship handling. A working hypothesis was formulated based on the findings of visual information processing and previous studies and tested using a developed ship handling simulator. The results revealed that: (1) the cognitive characteristics of the first-person perspective make it more effective in safely guiding ship handling than does the third-person perspective, and (2) the deviation in cognitive characteristics is prominent where collision can be easily avoided. The findings will aid the development of on-board and remotely piloted vessels and ensure the safety of their crews.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47608356","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: 1
A hybrid indoor/outdoor detection approach for smartphone-based seamless positioning 一种用于智能手机无缝定位的室内/室外混合检测方法
IF 2.4 4区 工程技术
Journal of Navigation Pub Date : 2022-04-26 DOI: 10.1017/S0373463322000194
Y. Bai, Lucas Holden, A. Kealy, S. Zaminpardaz, S. Choy
{"title":"A hybrid indoor/outdoor detection approach for smartphone-based seamless positioning","authors":"Y. Bai, Lucas Holden, A. Kealy, S. Zaminpardaz, S. Choy","doi":"10.1017/S0373463322000194","DOIUrl":"https://doi.org/10.1017/S0373463322000194","url":null,"abstract":"Abstract Indoor/Outdoor (IO) detection (IOD) using Wi-Fi- and smartphone-based technologies is in high demand and interest in both the industrial and research fields. This paper proposes a novel and effective hybrid IOD (HIOD) approach for detecting a smartphone user's IO location. The HIOD approach uses signals received from both Wi-Fi and GPS as well as the latest positioning technologies such as multilateration, fingerprinting and machine learning. This paper proposes and implements two-level signal-to-noise ratio (SNR) threshold parameters for the first time, which are specifically derived from GPS signals through 42 empirical tests at seven test sites with adequate environmental factors considered. Using the newly derived IOD threshold parameters and a set of IO detection rules, the HIOD approach is then tested at 20 test points (TPs) in a city canyon area, where most of the TPs are under semi-indoor or semi-outdoor conditions. The final test results show that a 100% IOD rate is achieved.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42422737","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
Numerical Adaptations of Captain Sumner's 1837 journey: a context for teaching celestial navigation 萨姆纳船长1837年旅程的数字改编:天文导航教学的背景
IF 2.4 4区 工程技术
Journal of Navigation Pub Date : 2022-04-25 DOI: 10.1017/S0373463322000170
T. Bensky
{"title":"Numerical Adaptations of Captain Sumner's 1837 journey: a context for teaching celestial navigation","authors":"T. Bensky","doi":"10.1017/S0373463322000170","DOIUrl":"https://doi.org/10.1017/S0373463322000170","url":null,"abstract":"Abstract In an effort to add context to a classroom lesson on celestial navigation, we present a numerical adaptation of Captain T.H. Sumner's 1837 journey into St. George's Channel. The adaptation is programmed into a ‘live’ web-based map. This allows for a flexible and highly visual presentation that highlights two important topics in celestial navigation: the origin of the line of position and the scale of maps. Considerations driving the numerical adaptation are discussed, as is as an overview of a classroom lesson we have been using.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49265813","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
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