Journal of Navigation最新文献_第8页

A mixed single- and dual-frequency quad-constellation GNSS precise point positioning approach on Xiaomi Mi8 smartphones 小米Mi8智能手机上的单双频四星座GNSS精确点定位方法

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-04-19 DOI: 10.1017/S0373463322000145

Yanjie Li, C. Cai

{"title":"A mixed single- and dual-frequency quad-constellation GNSS precise point positioning approach on Xiaomi Mi8 smartphones","authors":"Yanjie Li, C. Cai","doi":"10.1017/S0373463322000145","DOIUrl":"https://doi.org/10.1017/S0373463322000145","url":null,"abstract":"Abstract The high-precision global navigation satellite system (GNSS) positioning technique on smartphones has been attracting increasing interest in recent years. However, the low-cost GNSS chip and linearly polarised antenna embedded inside smartphones result in data lack and quality degradation, which hinders the high-precision GNSS positioning on smartphones. In this study, a mixed single- and dual-frequency quad-constellation precise point positioning (MSDQ-PPP) model is proposed to improve the positioning performance on smartphones by taking advantage of all available GNSS observations. Static and kinematic tests were made using a Xiaomi Mi8 smartphone to fully assess the MSDQ-PPP performance with comparisons to single-frequency PPP (SF-PPP) and dual-frequency PPP (DF-PPP) models. The static test results show that the MSDQ-PPP can reach an accuracy level of 0⋅39 m and 0⋅50 m in the horizontal and vertical directions with a convergence time of less than 10 min in most sessions. The MSDQ-PPP improves the positioning accuracy by 53% and 31% over the DF-PPP in the horizontal and vertical directions, respectively. In contrast to the SF-PPP, the positioning accuracy and convergence time improvement can reach 62% and 90% in the horizontal direction, respectively. In the kinematic test, the MSDQ-PPP achieves an accuracy of 0⋅7 m and 1⋅5 m in the horizontal and vertical directions, respectively. The accuracy improvement rates reach 78% and 76% over the DF-PPP, and 13% and 38% over the SF-PPP, respectively. Both static and kinematic MSDQ-PPP tests indicate significantly enhanced positioning performance.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48335913","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

Logical grouping of data and control functions on the displays of shipboard navigation systems 对船上导航系统显示器上的数据和控制功能进行逻辑分组

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-04-18 DOI: 10.1017/S0373463322000157

V. Vu, M. Lutzhoft, Marius Imset

{"title":"Logical grouping of data and control functions on the displays of shipboard navigation systems","authors":"V. Vu, M. Lutzhoft, Marius Imset","doi":"10.1017/S0373463322000157","DOIUrl":"https://doi.org/10.1017/S0373463322000157","url":null,"abstract":"Abstract Standards IEC 62288:2014 and MSC.191(79) require information on the displays of shipboard navigation systems to be logically grouped, but only provide limited specification for this ‘logical’ criterion. Meanwhile, complex interfaces and information overload remain as major design issues, being connected to several maritime accidents. To address this matter, a three-phase study was conducted to develop a pattern to organise essential information on Radar and Electronic Chart Display and Information System (ECDIS) displays and their equivalent modules on integrated navigation systems and integrated bridge systems. The first phase involved identifying the information most essential for safe navigation using cognitive task analyses, equipment performance standards and frequency of use. The second phase involved a card-sorting experiment with seafarers (n = 63) to develop an initial grouping pattern for the identified essential information. The third phase involved validating the initial grouping pattern with a new sample of seafarers (n = 35). The result is a pattern to group 48 types of information on shipboard navigation displays into 13 groups. The paper details the selected methods and the findings, and provides implications for future research.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48886124","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 abnormal ship trajectory based on the complex polygon 基于复杂多边形的船舶轨迹异常检测

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-04-18 DOI: 10.1017/S0373463322000182

Jinxian Weng, Guorong Li, Yahui Zhao

引用次数: 3

A Prefatory Study on the Effects of Alcohol on Ship Manoeuvring, Navigational and Decision-Making Abilities of Navigators 酒精对船舶操纵、航行和决策能力影响的研究

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-04-18 DOI: 10.1017/S0373463322000133

Seung-gi Gug, June-Ho Yun, Dimantha Harshapriya, Jae-Jin Han

{"title":"A Prefatory Study on the Effects of Alcohol on Ship Manoeuvring, Navigational and Decision-Making Abilities of Navigators","authors":"Seung-gi Gug, June-Ho Yun, Dimantha Harshapriya, Jae-Jin Han","doi":"10.1017/S0373463322000133","DOIUrl":"https://doi.org/10.1017/S0373463322000133","url":null,"abstract":"Abstract Adverse effects of intoxicated driving have been well documented over the years, with clear conclusions. In addition, it is evident that the cognitive and neurological functions and reaction times deteriorate with the consumption of alcohol. Addressing the lack of literature on the subject, this paper focuses on studying the effects of alcohol on manoeuvring, navigational and decision-making ability in ship navigation. Ten participants – five cadets and five experienced navigation officers – volunteered and carried out a standard manoeuvre using a computer-controlled vessel simulator, under three different blood alcohol concentrations (0⋅00%, 0⋅05% and 0⋅08% BAC). Results from the simulations were used to assess the performance and the decision-making ability of participants under the influence of alcohol. In addition, the responses and behaviour of the simulated vessel when the navigators were intoxicated were analysed. Workload experienced by participants during the simulations were also assessed using the NASA Task Load Index. Findings of this preliminary study proved that the ability to make the correct decisions at the right time was drastically deteriorated when the blood alcohol concentration was increased.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44641368","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

Proficiency of allocentric and egocentric wayfinding: a comparison of schoolchildren with young adults and older adults 异地中心和自我中心寻路的熟练程度：学童与年轻人和老年人的比较

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-04-11 DOI: 10.1017/S0373463321000965

Klara Rinne, D. Memmert, O. Bock

引用次数: 0

Communication-constrained cooperative bathymetric simultaneous localisation and mapping with efficient bathymetric data transmission method 通信受限的协同测深同时定位和绘图与有效的测深数据传输方法

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-04-04 DOI: 10.1017/S0373463321000904

Teng Ma, Wenjun Zhang, Ye Li, Yuxin Zhao, Qiang Zhang, Xiaojun Mei, Jiajia Fan

{"title":"Communication-constrained cooperative bathymetric simultaneous localisation and mapping with efficient bathymetric data transmission method","authors":"Teng Ma, Wenjun Zhang, Ye Li, Yuxin Zhao, Qiang Zhang, Xiaojun Mei, Jiajia Fan","doi":"10.1017/S0373463321000904","DOIUrl":"https://doi.org/10.1017/S0373463321000904","url":null,"abstract":"Abstract Bathymetric simultaneous localisation and mapping (SLAM) methods yield accurate navigation results for autonomous underwater vehicles (AUVs) and can construct consistent seabed terrain maps. Multiple independently working vehicles can complete tasks like surveying and mapping efficiently, which means cooperative bathymetric SLAM using multiple AUVs is suitable for large-scale seabed mapping. However, the transmission of bathymetric measurements collected using a multi-beam echo sounder over a low bandwidth, noisy, and unreliable acoustic channel is difficult, making cooperative bathymetric SLAM very challenging. This paper develops a graph-based cooperative bathymetric SLAM system that can compress many bathymetric measurements into small-scale acoustic packets and yield accurate navigation results with a 10% loss of acoustic packets caused by unreliable acoustic communication. According to the simulation conducted using the field data, the new algorithm is shown to be robust and capable of providing accurate location and mapping results over a low bandwidth, noisy, and unreliable acoustic channel.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42789145","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

Hi/H∞-optimised fault detection for a surface vessel integrated navigation system 水面舰艇综合导航系统的Hi/H∞优化故障检测

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-03-25 DOI: 10.1017/S0373463322000078

Muzhuang Guo, Chen Guo, Chuang Zhang

{"title":"Hi/H∞-optimised fault detection for a surface vessel integrated navigation system","authors":"Muzhuang Guo, Chen Guo, Chuang Zhang","doi":"10.1017/S0373463322000078","DOIUrl":"https://doi.org/10.1017/S0373463322000078","url":null,"abstract":"Abstract Strapdown inertial navigation systems are widely used in surface ships and warships. Although high-precision optical fibre inertial navigation systems are available, they have high cost and limited practicality. Therefore, they cannot replace the traditional platform inertial navigation systems in all ships. Hence, microelectromechanical system (MEMS)-based inertial sensors are widely used for robust navigation. Accurate and timely identification of sensor faults while ensuring stable navigation is a challenging task. This paper proposes a robust fault detection (FD) approach for a low-cost system that loosely integrates a strapdown inertial navigation system and the global navigation satellite system, where the integrated navigation state estimation provides high-accuracy output. A cubature Hi/H∞-optimised FD filter was designed for a nonlinear discrete time-varying system considering sensitivity to faults and robustness to disturbances. Furthermore, a threshold for FD was derived considering a compromise between the false alarm rate and fault diagnosis accuracy. Finally, the proposed method was validated through simulations using multiple noise distribution sensor data generated by a ship-manoeuvring simulator.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2022-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44387588","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

Energy optimised D* AUV path planning with obstacle avoidance and ocean current environment 能量优化的D* AUV路径规划与避障和洋流环境

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-03-22 DOI: 10.1017/S0373463322000091

Bing Sun, Wei Zhang, Shiqi Li, Xixi Zhu

引用次数: 5

NAV volume 75 issue 2 Cover and Front matter NAV第75卷第2期封面和封面问题

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-03-01 DOI: 10.1017/s0373463322000212

引用次数: 0

NAV volume 75 issue 2 Cover and Back matter NAV第75卷第2期封面和封底

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2022-03-01 DOI: 10.1017/s0373463322000200

引用次数: 0