Journal of Navigation最新文献_第2页

Selected issues of optimising parameters on square riggers to maximise speed 优化方形索具参数以最大限度提高速度的选定问题

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2023-03-01 DOI: 10.1017/S0373463323000103

Szymański Rafał, Specht Cezary

{"title":"Selected issues of optimising parameters on square riggers to maximise speed","authors":"Szymański Rafał, Specht Cezary","doi":"10.1017/S0373463323000103","DOIUrl":"https://doi.org/10.1017/S0373463323000103","url":null,"abstract":"Abstract Due to the exceptional complexity of the propulsion system (sails), square-riggers form a special group of sailing vessels. In modern pleasure and sport sailing, simple Bermuda (triangular) sailing rigging prevails, which is widely discussed in the literature, both in terms of theory and numerous experiments. The literature on the theory on square-riggers is, in turn, limited mainly to the description of good sailing practice developed over the centuries. Its important element was maximising vessel speed, but this discussion has not been documented by scientific research. This paper presents the significant parameters influencing the speed of a square-rigged sailing vessel and selects those which are the most important from the point of view of its maximisation. The paper also proposes methods and measurement systems which optimise selected parameters affecting the achievement of higher speeds. The paper describes the types of speeds of typical sailing vessels, provides a historical synthesis of sailing ships with respect to their speed, and presents a selection and description of the parameters affecting the speed of modern square-rigged vessels. The paper ends with a proposed method and measurement system for experimental research aiming at rigging optimisation in a square-rigged sailing vessel from the point of view of maximising its speed.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":"76 1","pages":"153 - 180"},"PeriodicalIF":2.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43201790","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

Safety analysis of RNP approach procedure using fusion of FRAM model and Bayesian belief network 基于FRAM模型和贝叶斯信念网络的RNP方法安全性分析

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2023-03-01 DOI: 10.1017/S0373463323000152

D. Oliveira, A. Moraes, Moacyr Machado Cardoso Júnior, L. Marini-Pereira

引用次数: 0

Ionospheric correction of S-band tracking radar data using NavIC S-band signals in missile test range applications 基于NavIC s波段信号的导弹试验场s波段跟踪雷达数据电离层校正

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2023-03-01 DOI: 10.1017/S0373463323000073

Mrinal Goswami, Atanu Santra, Sukabya Dan, R. Ghatak, A. Bose

{"title":"Ionospheric correction of S-band tracking radar data using NavIC S-band signals in missile test range applications","authors":"Mrinal Goswami, Atanu Santra, Sukabya Dan, R. Ghatak, A. Bose","doi":"10.1017/S0373463323000073","DOIUrl":"https://doi.org/10.1017/S0373463323000073","url":null,"abstract":"Abstract In missile test ranges, complex missions demand precise trajectory generated by radar. Both the radar and Global Navigation Satellite System (GNSS) signals are affected by atmospheric effects, degrading their accuracy and performance. The Indian Regional Navigation Satellite System/Navigation with Indian Constellation (IRNSS/NavIC) transmits signals in the S-band together with the L-band. This paper presents a novel experimental technique to improve the tracking accuracy of S-band radars using the concurrent NavIC S-band signal. The ionospheric delay using the NavIC S-band signal is calculated first, and the results are used to improve the trajectory data of simultaneously operating S-band radars. This is a unique application of the NavIC S-band signals apart from its conventional usage. During a launch mission, for low elevation angles, the ionospheric error is found to be ~130 m while at higher elevation angles the error values are found to be ~1–3 m. The concept is validated using data from a missile test mission. This report on the use of S-band GNSS signals for the correction of S-band radar range data offers a clear advantage of simplicity and accuracy.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":"76 1","pages":"225 - 237"},"PeriodicalIF":2.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48684169","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 76 issue 2-3 Cover and Back matter NAV第76卷第2-3期封面和背面事项

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2023-03-01 DOI: 10.1017/s037346332300022x

引用次数: 0

Prescribed performance LOS guidance-based dynamic surface path following control of surface vessel with position and heading errors constraint 具有位置和航向误差约束的水面舰艇基于规定性能LOS制导的动态水面路径跟踪控制

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2023-03-01 DOI: 10.1017/S0373463323000061

Zhipeng Shen, Ang Li, Li Li, Haomiao Yu

{"title":"Prescribed performance LOS guidance-based dynamic surface path following control of surface vessel with position and heading errors constraint","authors":"Zhipeng Shen, Ang Li, Li Li, Haomiao Yu","doi":"10.1017/S0373463323000061","DOIUrl":"https://doi.org/10.1017/S0373463323000061","url":null,"abstract":"Abstract Concentrating on a surface vessel with input saturation, model uncertainties and unknown disturbances, a path following the adaptive backstepping control method based on prescribed performance line-of-sight (PPLOS) guidance is proposed. First, a prescribed performance asymmetric modified barrier Lyapunov function (PPAMBLF) is used to design the PPLOS and the heading controller, which make the path following position and heading errors meet the prescribed performance requirements. Furthermore, the backstepping and dynamic surface technique (DSC) are used to design the path following controller and the adaptive assistant systems are constructed to compensate the influence of input saturation. In addition, neural networks are introduced to approximate model uncertainties, and the adaptive laws are designed to estimate the bounds of the neural network approximation errors and unknown disturbances. According to the Lyapunov stability theory, all signals are semi-globally uniformly ultimately bounded. Finally, a 76$,{cdot },$2 m supply surface vessel is used for simulation experiments. The experimental results show that although the control inputs are limited, the control system can still converge quickly, and both position and heading errors can be limited to the prescribed performance requirements.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":"76 1","pages":"255 - 285"},"PeriodicalIF":2.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46438403","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 collaborative collision avoidance strategy for autonomous ships under mixed scenarios 混合场景下自主船舶的协同避碰策略

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2023-03-01 DOI: 10.1017/S0373463323000012

Shaobo Wang, Yingjun Zhang, Feifei Song, Wengang Mao

{"title":"A collaborative collision avoidance strategy for autonomous ships under mixed scenarios","authors":"Shaobo Wang, Yingjun Zhang, Feifei Song, Wengang Mao","doi":"10.1017/S0373463323000012","DOIUrl":"https://doi.org/10.1017/S0373463323000012","url":null,"abstract":"Abstract Ship collision avoidance has always been one of the classic topics in the field of marine research. In traditional encounter situations, officers on watch (OOWs) usually use a very high frequency (VHF) radio to coordinate each other. In recent years, with the continuous development of autonomous ships, there will be a mixed situation where ships of different levels of autonomy coexist at the same time. Under such a scenario, different decision makers have different perceptions of the current scene and different decision-making logic, so conventional collision avoidance methods may not be applicable. Therefore, this paper proposes a collaborative collision avoidance strategy for multi-ship collision avoidance under mixed scenarios. It builds a multi-ship cooperative network to determine cooperative objects and timing, at the same time. Based on a cooperative game model, a global collision avoidance responsibility distribution that satisfies group rationality and individual rationality is realised, and finally achieves a collaborative strategy according to the generalised reciprocal velocity obstacle (GRVO) algorithm. Case studies show that the strategy proposed in this paper can make all ships pass each other clearly and safely.","PeriodicalId":50120,"journal":{"name":"Journal of Navigation","volume":"76 1","pages":"200 - 224"},"PeriodicalIF":2.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43182498","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

Minimum required accuracy for HD maps HD地图的最低精度要求

IF 2.4 4区工程技术

Journal of Navigation Pub Date : 2023-03-01 DOI: 10.1017/S0373463323000140

Š. Křehlík, M. Vanžura, Adam Skokan

引用次数: 0

NAV volume 76 issue 2-3 Cover and Front matter NAV 76卷，第2-3期，封面和封面

4区工程技术

Journal of Navigation Pub Date : 2023-03-01 DOI: 10.1017/s0373463323000218

引用次数: 0

Collision risk quantification for pairs of recorded aircraft trajectories 记录的成对飞机轨迹的碰撞风险量化

IF 2.4 4区工程技术