• Title/Summary/Keyword: Navigation device

Search Result 436, Processing Time 0.023 seconds

Alignment of Inertial Navigation Sensor and Aircraft Fuselage Using an optical 3D Coordinate Measuring Device (광학식 3차원 좌표측정장치를 이용한 관성항법센서와 기체의 정렬기법)

  • Kim, Jeong-ho;Lee, Dae-woo
    • Journal of the Korean Society for Aeronautical & Space Sciences
    • /
    • v.47 no.1
    • /
    • pp.41-48
    • /
    • 2019
  • This paper deals with a method of aligning an aircraft fuselage and an inertial navigation sensor using three-dimensional coordinates obtained by an optical method. In order to verify the feasibility, we introduce the method to accurately align the coordinate system of the inertial navigation sensor and the aircraft reference coordinate system. It is verified through simulation that reflects the error level of the measuring device. In addition, optimization method based alignment algorithm is proposed for connection between optical sensor and inertial navigation sensor.

Implementation of ISO/IEEE 11073-10404 Monitoring System Based on U-Health Service (유헬스 서비스 기반의 ISO/IEEE 11073-10404 모니터링 시스템 구현)

  • Kim, Kyoung-Mok
    • Journal of Advanced Navigation Technology
    • /
    • v.18 no.6
    • /
    • pp.625-632
    • /
    • 2014
  • The u-health service is using portable device such as smart device and it consists of small computing device. The u-health service carry out same performance with desktop computer. We designed message structure based on Bluetooth HDP. This message structure is used to transmit patient's biometric data on the smart device of medical team, patient and family over the mobile network environment. ISO/IEEE 11073 PHD standard was defined based on the method of communication between the agent and the manager. And We are confirmed the reliable transmission of biometric data at the smart device by implementing the android OS based patient information monitoring application to check the status of patient for medical team, patient and family.

A Study on the Control of Hydrodynamic forces for Wave Energy Conversion Device Operating in Constantly Varying Ocean Conditions (파력 발전기에 미치는 유체력의 제어에 관한 연구)

  • 김성근;박명규
    • Journal of the Korean Institute of Navigation
    • /
    • v.14 no.4
    • /
    • pp.41-52
    • /
    • 1990
  • Due to the constantly varying sea-state with which any wave energy conversion device must contend in order to extract energy efficiently , the ability to control the device's position relative to the incident waves is critical in achieving the creation of a truly functional and economical wave energy device. In this paper, the authors will propose methodology based on the theory of a variable structure system to utilize a three dimensional source distribution as a model to estimate anticipated surge, sway and yaw of a wave energy conversion device relative to varying angles and characteristics of incident waves and there from derive a feedback to a sliding mode controller which would reposition the device so as to maximize its ability to extract energy from waves in constantly varying ocean conditions.

  • PDF

A Study on the Inertial Navigation System Technology (관성항법장치 기술에 관한 연구)

  • Lee, Young-Uk
    • Convergence Security Journal
    • /
    • v.8 no.2
    • /
    • pp.87-94
    • /
    • 2008
  • In this paper, a study on the inertial navigation system technology in guided weapon system development. Navigation devices are being used more commonly in places. Inertial navigation devices attached to them are used as weapons systems have a lot of interest in the development of devices for research and development accelerated. Therefore, this paper will encourage the development of weapon systems Inertial navigation device trends, features and configuration, type, techniques for research work.

  • PDF

A Study on Implementation of the Mobile Application of Aid to Navigation Using Location-based Augmented Reality

  • Jeon, Joong-Sung
    • Journal of Navigation and Port Research
    • /
    • v.43 no.5
    • /
    • pp.281-288
    • /
    • 2019
  • In this paper, we implemented a mobile application of location-based augmented reality that combines self-sensing technology and various safety information using technological advancements of the smartphone. Vessel navigation is a suitable area for augmented reality because it requires accurate knowledge of the distance and location of destinations, danger zones, AtoN, and adjacent vessels. Current smartphone applications only provide 2D images and location information. Such applications do not include information about the surrounding environment, and as a result, they can only function using their own sensing information and surrounding information into a location-based augmented reality. If you provide a variety of sensor information embedded in the smartphone to 'BadaGO', the implemented application through this study, 'BadaGO' can provide safe navigation information to the user device in real time with a variety of its own formed information. The user has a high practicality and applicability of a small ship that is supplied with safe navigation information in a changing marine environment only by providing information through the application on the smartphone.

A Study of Marine Network NMEA2000 for e-Navigation

  • Kim, Kyung-Yup;Park, Dong-Hyun;Shim, Jin-Bo;Yu, Yung-Ho
    • Journal of Advanced Marine Engineering and Technology
    • /
    • v.34 no.1
    • /
    • pp.133-140
    • /
    • 2010
  • NMEA2000 protocol known as IEC61162-3 of Multi-talker, Multi-listener, PnP communication is adopted as standard network for SOLAS ship by ISO in 2008 for e-navigation ages. NMEA2000 network uses well known CAN in physical layer. In this paper, address claim function is implemented for protocol converter device which can be used easily in combination with CPU of non network device. We are going to implement full function of NMEA2000 protocol and provide guideline to develop ship equipment to be networked easily.

A Study on the Prediction Method of Propulsive Energy Loss Related to Automatic Steering of Ships (자동조타로써 항행하는 선박의 추진 에너지 손실량 평가법에 관한 연구)

  • 손경호;이경우;황승욱;배정철
    • Journal of the Korean Institute of Navigation
    • /
    • v.19 no.3
    • /
    • pp.11-19
    • /
    • 1995
  • When an automatic course keeping is introduced, as is quite popular in modern navigation, the closed-loop control system consists of autopilot device, power unit, steering gear, ship dynamics, and magnetic or gyrocompass. We derive mathematical models of each element of the automatic steering system. We provide a method of theoretical analysis on the propulsive energy loss related to automatic steering of ships in the open seas, taking account of the on-off(non-linear) characteristics of power unit. Also we paid attention to non-linear element installed in autopilot device, which is normally called weather adjuster. Next we make numerical calculation of the effects of autopilot control constants on the propulsive energy loss for two kinds of ship, a fishing boat and an ore carrier. Realistic sea and wind disturbances are employed in the calculation.

  • PDF

A Study on the Prediction of Propulsive Energy Loss Related to Automatic Steering of Ships

  • Sohn, Kyoung-Ho;Lee, Gyoung-Woo;Lim, Gun;Bae, Jeong-Cheul
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
    • /
    • 1995.11a
    • /
    • pp.153-165
    • /
    • 1995
  • When an automatic course-keeping is introduced as is quite popular in modern navigation the closed-loop steering system consists of autopilot device power unit(or telemotor unit) steering gear ship dynamics and magnetic or gyro compass. We derive the mathematical model of each element of the automatic steering system. We provide a method of theoretical analysis on propulsive energy loss related to automatic steering of ships inthe open seas taking account of the on-off mechanism of power unit. Also we paid attention to dead band mechanism of autopilot device which is normally called weather adjustment. Next we make numerical calculation of the effects of autopilot control constants ont he propulsive energy loss for two kinds of ship a fishing boat and an ore carrier. Realistic sea and wind disturbances are employed in the calculation.

  • PDF

Development of Augmented Reality Indoor Navigation System based on Enhanced A* Algorithm

  • Yao, Dexiang;Park, Dong-Won;An, Syung-Og;Kim, Soo Kyun
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • v.13 no.9
    • /
    • pp.4606-4623
    • /
    • 2019
  • Nowadays modern cities develop in a very rapid speed. Buildings become larger than ever and the interior structures of the buildings are even more complex. This drives a high demand for precise and accurate indoor navigation systems. Although the existing commercially available 2D indoor navigation system can help users quickly find the best path to their destination, it does not intuitively guide users to their destination. In contrast, an indoor navigation system combined with augmented reality technology can efficiently guide the user to the destination in real time. Such practical applications still have various problems like position accuracy, position drift, and calculation delay, which causes errors in the navigation route and result in navigation failure. During the navigation process, the large computation load and frequent correction of the displayed paths can be a huge burden for the terminal device. Therefore, the navigation algorithm and navigation logic need to be improved in the practical applications. This paper proposes an improved navigation algorithm and navigation logic to solve the problems, creating a more accurate and effective augmented reality indoor navigation system.

A Novel Calibration Method Research of the Scale Factor for the All-optical Atomic Spin Inertial Measurement Device

  • Zou, Sheng;Zhang, Hong;Chen, Xi-yuan;Chen, Yao;Fang, Jian-cheng
    • Journal of the Optical Society of Korea
    • /
    • v.19 no.4
    • /
    • pp.415-420
    • /
    • 2015
  • A novel method to measure the scale factor for the all-optical atomic spin inertial measurement device (ASIMD) is demonstrated in this paper. The method can realize the calibration of the scale factor by a self-consistent method with small errors in the quiescent state. At first, the matured IMU (inertial measurement unit) device was fixed on an optical platform together with the ASIMD, and it has been used to calibrate the scale factor for the ASIMD. The results show that there were some errors causing the inaccuracy of the experiment. By the comparative analysis of theory and experiment, the ASIMD was unable to keep pace with the IMU. Considering the characteristics of the ASIMD, the mismatch between the driven frequency of the optical platform and the bandwidth of the ASIMD was the major reason. An all-optical atomic spin magnetometer was set up at first. The sensitivity of the magnetometer is ultra-high, and it can be used to detect the magnetization of spin-polarized noble gas. The gyromagnetic ratio of the noble gas is a physical constant, and it has already been measured accurately. So a novel calibration method for scale factor based on the gyromagnetic ratio has been presented. The relevant theoretical analysis and experiments have been implemented. The results showed that the scale factor of the device was $7.272V/^{\circ}/s$ by multi-group experiments with the maximum error value 0.49%.