• Title, Summary, Keyword: Non Precision Approach

Search Result 72, Processing Time 0.04 seconds

A Study on the Approach Methods with a Constant Vertical Speed for Diminution of CFIT Accidents in Non-Precision Approach (비정밀접근시 CFIT사고 방지를 위한 일정강하율 접근방식에 관한 연구)

  • Song, B.H.;Sin, H.S.;Moon, K.B.
    • Journal of the Korean Society for Aviation and Aeronautics
    • /
    • v.13 no.4
    • /
    • pp.43-57
    • /
    • 2005
  • Traditionally aircraft had descended in steps to level at the MDA(Minimum Descent Altitude) during the conduct of non-precision approach. This "de-stabilized" method of flying an instrument approach procedure is considered as a major contributing factor in CFIT(Controlled Flight Into Terrain) accident and increasing pilot workload. In the effort to reduce CFIT accident and pilot workload, VNAV(Vertical Navigation) Approach has been suggested as means to manage the vertical component of non-precision approach procedure.[1] But In the actual circumstances in Korea, VNAV has not been using to reduce them because of many restriction facts and no published VNAV chart in particular airport. Therefore we are suggesting Constant Vertical Speed Approach Method, which is required few restriction facts, and the pilots who are using this method will experience a similar method like a Glideslope during proceeding non-precision approach. Consequently, We are expecting to reduce CFIT accidents and pilot workload.

  • PDF

Development of Non-precision Approach Procedures Checklist (비정밀접근절차 체크리스트 개발연구)

  • Gil, Ho-Seong;Jeon, Je-Hyung;Kim, Hyun-Soo;Son, Byung-Heum
    • Journal of the Korean Society for Aviation and Aeronautics
    • /
    • v.24 no.3
    • /
    • pp.37-47
    • /
    • 2016
  • After a thorough investigation of aviation accidents involving Korean national carriers both inside and outside of Korea and also after reviewing catastrophic events involving foreign carriers in Korea, we found numerous accidents that caused fatalities and serious personal injuries. Although the aircrafts involved were found to have no specific defects, many of the accidents were caused by the pilot's misjudgement according to previous studies. Our research is to find an new procedure to help the prevention of similar accidents by focusing particularly on CFIT accidents during the procedural operations of Non Precision Approach, Circling Approach and Visual Approach. Therefore, we emphasize the significance of this research on the development of the new checklist that will help achieve a safe and effective procedural operation for non precision approaches.

Non Precision Approach Procedures Accident Case Studies (비 정밀 접근절차 사고사례 연구)

  • Gil, Ho-Seong;Jeon, Je-Hyeong;Song, Byeong-Heum
    • 한국항공운항학회:학술대회논문집
    • /
    • /
    • pp.257-260
    • /
    • 2015
  • 국적기의 사고 및 국내에서 발생한 사고를 분석해보면 많은 인명 피해가 발생된 사고의 유형들을 접할 수 있다. 운항중인 항공기에 특별한 결함이 없었음에도 불구하고 조종사의 잘못된 판단에 의한 사고는 선행연구들의 결과와 같이 많은 부분들을 차지하고 있다. 특히 비 정밀접근(Non Precision Approach)의 선회접근(Circling Approach) 및 시계접근(Visual Approach)절차에서 자주 발생되는 지상충돌 사례들을 과학적이고 객관적인 방법을 바탕으로 분석하여 유사사고 재발 방지를 위한 대안을 찾고자 한다. 이를 위해 조종사의 입장에서의 교육 및 절차에 관해 분석하여 비 정밀 접근 절차 수행의 기준을 제언하고자 한다.

  • PDF

Self-organizing neuro-tracking of non-stationary manufacturing processes

  • Wang, Gi-Nam;Go, Young-Cheol
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • /
    • pp.403-413
    • /
    • 1996
  • Two-phase self-organizing neuro-modeling (SONM). the global SONM and local SONM, is designed for tracking non-stationary manufacturing processes. Radial basis function (RBF) neural network is employed, and self-tuning estimator is also developed for the determination of RBF network parameters on-line. A pattern recognition approach is presented for identifying a correct RBF neural network, which is used for identifying current manufacturing processes. Experimental results showed that the proposed approach is suitable for tracking non-stationary processes.

  • PDF

Application of GNSS Non-Precision and Precision Approaches to a Circle-to-Land Approach Airport (선회착륙공항에서의 GNSS 비정밀접근 및 정밀접근 적용 연구)

  • Kim, Y.M.;Kang, J.Y.
    • Journal of the Korean Society for Aviation and Aeronautics
    • /
    • v.12 no.3
    • /
    • pp.65-85
    • /
    • 2004
  • Circling to land is a relatively dangerous maneuver. It contains the worst elements of IFR flight. There is a minimum obstruction clearance, a limited space in which to maneuver, an absence of visual reference, and trying to keep the runway in sight while preparing to land. At night it is quite a bit more than dangerous. The required continuous turn in marginal conditions that keeps the airport in sight is hazardous. Therefore, this paper proposes an application of GNSS to circling approach to reduce or remove chances of accidents which may occur under such unfavorable flight conditions. The study reviews relevant documents published by ICAO and FAA and provides scenarios for non-precision and precision approaches and circling approach based on the GNSS for Kimhae airport. Also requirements for the ground facility design are studied and provided.

  • PDF

A Study on an Application of the Protection for the Visual Segment of the Approach Procedure focused on Taean Airport (접근절차의 시계구간 보호 적용 연구 - 태안비행장을 중심으로 -)

  • Kim, Dohyun;Hong, Seung Beom
    • Journal of the Korean Society for Aviation and Aeronautics
    • /
    • v.22 no.2
    • /
    • pp.9-15
    • /
    • 2014
  • 'Visual segment surface' means a surface that extends from the missed approach point of non precision approaches (or the decision altitude location for approaches with vertical guidance and precision approaches) to the threshold to facilitate the identification of and protection from obstacles in this visual segment of the approach. Validation is the necessary final quality assurance step in the procedure design process, prior to publication. The purpose of validation is the verification of all obstacle and navigation data, and assessment of flyability of the procedure. This paper shows how to apply the protection for the visual segment of the approach procedure, and the results of the validation for visual segment surface conducted at an airport.

A Development of CAD Program for Forging Die Design of Gear Components (기어류 부품의 단조 금형설계용 CAD 프로그램 개발)

  • 최종웅;조해용;최재찬;조창용
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.15 no.11
    • /
    • pp.21-31
    • /
    • 1998
  • This study described computer aided die design system for cold forging of non-axisymmetric parts. To design the die of cold forging. an integrated approach based on a rule-base system and commercial F. E. code were adopted. This system is implemented on the personal computer and its environment is a commercial CAD package named as AutoCAD. The system includes four modules. In the initial data input module, the variables which are necessary to design of die are inputted by user and die material are selected from the database. In the analysis and redesign module, stress distrubution action on the designed die is analyzed by commercial FEM code NISA II. The designed die is modified to prevent failure in both states of stress free and pressurizing. The developed system provides powerful capabilities for die design of non-axisymmetric parts.

  • PDF

A Study on the Driving Principles of a Novel Non-contact Surface Actuator Using Combination of Magnetic Force (비접촉 평면 구동기의 자기력 조합 방식 구동 원리)

  • Jung, Kwang-Suk;Baek, Yoon-Su
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.18 no.3
    • /
    • pp.115-121
    • /
    • 2001
  • In micro automation technology, the concurrent realization of a high resolution and a large operating rage has been achieved by a dual actuator, usually called by piggy-back system, conventionally. But, because of its manufacturing cost, the complexity of control, and the limit of overall bandwidth, the contract-free and single servo actuators have been suggested with specific applications. In this paper, we suggest a novel non-contact surface actuator suing combination of the Lorentz force and the magnetized force, and discuss the actuating principles including an analytical approach. Differently from the existing planar system, an operating range of the suggested system can be expanded by an additional attachment of active elements. Therefore, it is estimated to be suitable for the next-generation moving system.

  • PDF

Hybrid Approach of Texture and Connected Component Methods for Text Extraction in Complex Images (복잡한 영상 내의 문자영역 추출을 위한 텍스춰와 연결성분 방법의 결합)

  • 정기철
    • Journal of the Institute of Electronics Engineers of Korea SP
    • /
    • v.41 no.6
    • /
    • pp.175-186
    • /
    • 2004
  • We present a hybrid approach of texture-based method and connected component (CC)-based method for text extraction in complex images. Two primary methods, which are mainly utilized in this area, are sequentially merged for compensating for their weak points. An automatically constructed MLP-based texture classifier can increase recall rates for complex images with small amount of user intervention and without explicit feature extraction. CC-based filtering based on the shape information using NMF enhances the precision rate without affecting overall performance. As a result, a combination of texture and CC-based methods leads to not only robust but also efficient text extraction. We also enhance the processing speed by adopting appropriate region marking methods for each input image category.

Evaluation of Non Destructive Inspection Interval for Running Safety of Railway Axle (철도차량 안전성을 위한 주행 차축의 비파괴 검사주기 평가)

  • Kwon, Seok Jin;Lee, Dong Hyung;Seo, Jung Won;Kim, Jae Chul
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.31 no.9
    • /
    • pp.777-782
    • /
    • 2014
  • Usually, railway axles are designed for infinite life based on endurance limit of the material and the axle is not fractured immediately when a surface crack initiated. The railway axles have been inspected regularly by NDT such as ultrasonic testing, magnetic testing and eddy current testing and so on. Because the axle failure is profoundly influenced by the probability of missing a fatigue crack during an NDT inspection, it is necessary to evaluate the Non Destructive Interval of railway axle. In the present paper, the Non Destructive Interval of railway axle based on fracture mechanics and finite element analysis was investigated. It was shown that the Non Destructive Interval of railway axle can be evaluated using fracture mechanics approach and extended using NDT which a crack can detect clearly.