• Title/Summary/Keyword: land vehicle navigation

Search Result 51, Processing Time 0.024 seconds

A Study on the Modal Shift Effects by Car-ferry Networks in Korea (한반도 카페리 네트웍화에 의한 물류수단이전과 그 효과에 관한 연구)

  • Kim, Myung-Jae;Jang, Woon-Jae
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
    • /
    • 2013.06a
    • /
    • pp.209-213
    • /
    • 2013
  • The expense Our country's land logistics system is becoming backlog day by day. The greenhouse gas which it discharges specially from the vehicle causes a ecocide and traffic expense to make. The traffic energy curtailment which the government enforces during that time and environment-friendly green goods policy lost the effect. Therefore, This research propose the car-ferri network which is the most effective logistics system substitutes the land logistics system. This research will contribute improving the north and south logistics network of Pusan and Seoul region and will be able to reduce a various goods expense.

  • PDF

Vehicle Navigation using Carrier Phase of GPS/GLONASS (GPS/GLONASS의 반송파 위상을 이용한 차량항법)

  • Lee, In-Su;Lee, Yong-Hee;Moon, Du-Youl;Son, Young-Dong
    • Journal of Navigation and Port Research
    • /
    • v.26 no.3
    • /
    • pp.303-310
    • /
    • 2002
  • Nowadays, the combined land navigation system using GPS(Global Positioning System) and DR(Deduced Reckoning), etc. has been used. Although GPS is popular with the land navigation system, this is not useful for the kinematic positioning of the vehicles in the urban canyon because of its few satellites. Thus, this study deals with the kinematic positioning of the vehicles with the combined GPS/GLONASS(GLObal Navigation Satellite System) to compliment the drawbacks of GPS. So the kinematic positioning of the vehicles can be performed constantly by the combined GPS/GLONASS based on the high acquisition rate of data with the help of GLONASS despite of many obstacles and few satellites tracked in the test sites. Consequently, the combined GPS/GLONASS can be applicable to the control of traffic flow and the effective management of read system.

Development of Monitoring Program Based an Automotive GPS/DR Integrated Navigation System for Lane Departure Warning (차선이탈경보를 위한 차량용 GPS/DR 통합항법시스템 기반의 모니터링 프로그램 개발)

  • Park, Soon-Chul;Chun, Se-Bum;Kim, Jeong-Won;Heo, Moon-Beom
    • Journal of Advanced Navigation Technology
    • /
    • v.14 no.6
    • /
    • pp.791-799
    • /
    • 2010
  • In this paper, integrated navigation algorithm is designed for land transport sector which is needed high accuracy and monitoring program is developed for lane departure warning. High accuracy position information which is possible lane separation is needed for lane departure warning, so position detection algorithm based GPS/DR which combine GPS with dead reckoning is proposed. For the verification of the designed integrated navigation algorithm, we drived to acquire data and showed post-processing experiment results with monitoring program. Vehicle driving movie and aerial photograph in monitoring program is designed to show lane keeping and lane separation.

Development of a Map Matching Method for Land Vehicles Navigation (차량 항법을 위한 지도 정합법 개발)

  • Sung Tae-Kyung;Pyo Jong-Sun
    • Journal of the Institute of Electronics Engineers of Korea SC
    • /
    • v.42 no.4 s.304
    • /
    • pp.1-10
    • /
    • 2005
  • This paper presents a map matching method using multiple hypothesis technique(MHT) to identify the road that a land vehicle is located on. To realize a map matching method using MHT, Pseudo-measurements are generated utilizing adjacent roads of GPS/DR position and the MHT is reformulated as a single target problem. Since pseudo-measurements are generated using digital map, topological properties such as road connection, direction, and road facility information are considered in calculating probabilities of hypotheses. In order to improve the map matching performance under when bias errors exist in digital road map data, a Kalman filter is employed to estimate the biases. Field experimental results show that the proposed map matching method provides the consistent performance even in complex downtown areas, overpass/underpass areas, and in the areas where roads are adjacent in parallel.

Development of Effective Test Method for Positioning Accuracy of Armed Vehicle Inertial Navigation System (기동화력장비 관성항법장치의 효과적인 위치정확도 시험방법 개발)

  • Kim, Sung Hoon;Bae, In Hwa;Kim, Sang Boo
    • Journal of Korean Society for Quality Management
    • /
    • v.51 no.4
    • /
    • pp.619-632
    • /
    • 2023
  • Purpose: The main function of INS (Inertial Navigation System) is to measure the position of an armed vehicle and its performance is confirmed through the positioning accuracy test of Korean Defense Standards (KDS). The current standards, however, do not provide clear test methods and the conditions for performing positioning accuracy tests. Accordingly, the purpose of this study is to develop a new method for positioning accuracy test which would be effective. Methods: In this study, a new INS positioning accuracy test method is suggested based on the analysis of test data collected through a statistical experiment known as central composite design. For the positioning accuracy experiment of K105A1, a self-propelled artillery, two factors of driving velocity and driving distance are considered. Results: Based on the analysis of experimental data, a regression model for the positioning error is fitted and the positioning accuracy test of INS is so developed to maximize the positioning error. The standard proximity rate is used as an additional test criterion to evaluate the performance level of INS. Conclusion: The proposed new positioning accuracy test for INS has the advantage of finding the nonconforming items effectively. It is also expected to be utilized for the other similar INS positioning accuracy tests.

Fault Detection Method of GNSS Carrier Phase Measurement using Vehicle Velocity and Antenna Baseline Distance (이동체의 속도와 안테나 기저선을 활용한 반송파 측정값의 고장검출)

  • Park, Jae-Ik;Lee, Eun-Sung;Heo, Moon-Beom;Nam, Gi-Wook;Sim, Eun-Sup
    • Journal of Advanced Navigation Technology
    • /
    • v.14 no.5
    • /
    • pp.640-647
    • /
    • 2010
  • Many methods have been proposed to detect faults of carrier phase measurements, but there are no distinguished methods for land transportation systems. in this paper, the baseline constraints are used to detect faults in GPS carrier phase measurements with vehicle dynamic information. The faults include the multipath on GPS carrier measurements. Multiple antenna groups are used for this research. In the measurement domain the fault detection has been accomplished so that the implementation is easier than other methods.

Caculating Ship Rudder Angle and Real-Time Mass Estimator Under Dynamic State (동적 상태의 선박 조향각 및 실시간 질량 추정 시스템)

  • Jin–hyuk Myung
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
    • /
    • 2022.06a
    • /
    • pp.31-32
    • /
    • 2022
  • In Early vessels did not provide an exact equation for preventig the capsizing vessels. On land, many vehicle rollover prevention technologies using the steady-state Conrning Equations were developed, which showed better performance than the exiting method at sea. For better performance, It is proposed to improve safety mangement when turning vessel using the Ackerman geometic model-based Cornering Equations in this paper.

  • PDF

Applications and Key Technologies of Biomimetic Underwater Robot for Naval Operations (생체모방형 수중로봇의 해양작전 운용개념 및 핵심소요기술)

  • Lee, Ki-Young
    • Journal of the Korea Institute of Military Science and Technology
    • /
    • v.18 no.2
    • /
    • pp.189-200
    • /
    • 2015
  • This paper gives an overview on the some potential applications and key technologies of biomimetic underwater robot for naval operations. Unlike most manned underwater naval systems, biomimetic underwater robots can be especially useful in near-land or harbour areas due to their ability to operate in shallow water effectively. Biomimetic underwater robot provide advantages in reaching locations that would be difficult or too dangerous for a manned vehicle to reach, as well as providing a level of autonomy that can remove the requirement for dedicated human operator support. Using multiple or schools of underwater robots would provide increased flexibility for navigation, communication and surveillance ability. And it alleviate some of the restrictions associated with speed and endurance design constraints.

How multipath error influences modernized GNSS ambiguity resolution in urban areas

  • Kubo, Nobuaki;Yasuda, Akio
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
    • /
    • v.2
    • /
    • pp.131-136
    • /
    • 2006
  • Commercial uses of GPS have been growing rapidly with applications for aircraft, ship, and land vehicle navigation as well as for surveying and time keeping. The next generation GPS and Japanese QZS (Quasi Zenith Satellite) will provide three different civil signals. Galileo will also provide several types of civil signals. The availability of the third civil frequency has obvious advantages to instantaneous carrier phase accuracy and ambiguity resolution for centimeter level measurements. This paper discusses the effects of additional new civil signals for the high accuracy positioning in urban areas based on simulation using practical raw data. As for constellation, only GPS and GPS+QZS are considered. For positioning, a short distance baseline is assumed in order to disregard atmosphere effects. In this simulation, mask angle and signal conditions were fixed and ambiguity success rates were compared between different triple frequency combination scenarios. The coefficient of reflection was set randomly from 0.05 to 0.5 and the multipath delay was also set randomly from 5-100 m. Visible satellites and signal strength were determined by raw data collected in Tokyo by car. These simulation results have confirmed that the availability of high accuracy positioning will increase in all scenarios if we use GPS+QZS with triple frequencies.

  • PDF

Test and Evaluation for GNSS based Lane Level Precise Positioning User System (위성항법 기반 차로구분 정밀위치결정 사용자 시스템 시험 평가)

  • Lee, Jung-Hoon;Lee, Sangwoo;Ahn, Jongsun;Im, Sunghyuck;Choi, Yunseong;Jang, Youngsu;Lee, Dongchul;Heo, Moon-Beom
    • Journal of Advanced Navigation Technology
    • /
    • v.22 no.6
    • /
    • pp.566-576
    • /
    • 2018
  • The C-ITS requires the lane level positioning of the vehicle in the land transportation environment, and it is most effective to utilize the GNSS. In the precision positioning system based on satellite navigation, the evaluation of dynamic environment of lane level positioning performance should be accompanied and the evaluation system configuration should be preceded. In this paper, we selected performance indicators, assessment equipment, and reliability of reference equipment for evaluation of precision positioning user systems based on the GNSS. The performance evaluation system described above is applied to a real system, and the performance evaluation tool developed for the evaluation system is described. The numerical performance evaluation was carried out based on the data collected by carrying out the actual testbed driving. The performance evaluation by the actual driving trajectory and driving image comparison was performed to derive and analyse the evaluation results of the vehicle lane level positioning user system.