• Title/Summary/Keyword: flight software

Search Result 352, Processing Time 0.031 seconds

The analysis of the cultivation status of the upland crops in the paddy field using unmanned aerial vehicle

  • Park, Jin-Ki;Kwak, Kang-Su;Park, Jong-Hwa
    • Proceedings of the Korean Society of Crop Science Conference
    • /
    • 2017.06a
    • /
    • pp.352-352
    • /
    • 2017
  • Recently, the South Korean government encourages the cultivation of upland crops in the paddy field to maintain an adequate level of rice production and then to balance the demand and supply of rice. This is mainly because the rice consumption per capita per year has continued to decline from 135 kg in 1979 to 61.9 kg in 2016, although the rice production was relatively stable. As a result, the rice overproduction became a big social problem. As a part of that, various upland crops such as soybean, maize, minor cereals and forage crops are planted in the paddy field 10 years ago. The cultivation of these crops may settle the problem of short supply and mass import of the crops to some extent. However, a systematic remote observation of upland crops in the paddy field is very scarce. This study investigated the cultivation status of upland crops and any changes of crop harvesting in the paddy field by using an unmanned aerial vehicle (UAV). Also, we analyzed the kind of upland crops and cultivation area in the paddy field by utilizing time series observation images. A fixed wing UAV is used for the investigation. This is because it is easy to use the flight operation and to control flight management software, and it can automatically cope with various emergency states such as a strong wind and battery discharge. The material of UAV is expanded polypropylene, which has an advantage of less equipment damage and risk during takeoff and landing. We acquired observed images in Buljeong-myeon, Goesan-gun, Chungcheongbuk-do, South Korea by using fixed wing UAV in 2015 and 2016. The total investigated area reaches 6,045 ha, and among them the agricultural area was 1,377 ha. For the next step, we created an orthoimage from all images taken using Pix 4D mapper program. According to the results of image analyses in 2015, the paddy field covered total 577 ha (75.9%) with crop plant. The cultivation area of beans, ginseng, maize, tobacco and peach was 256 ha (36.6%), 63 ha (9.2%), 37 ha (5.4%), 31 ha (4.5%) and 27 ha (3.8), respectively. And in 2016, the total covered area was 586 ha (77.1%), and it was comprised of 253 ha (35.5%), 88 ha (12.3%), 29 ha (4.1%), 22 ha (3.1%) and 32 ha (4.5%) in the same order. In this study, we focused on identifying the paddy field which was converted to the cultivation of upland crops by using UAV. And, it has been indicated that the cultivation area of rice decreased from 141 ha in 2015 to 127 ha in 2016, although that of ginseng increased by 25 ha. As a result, it is expected that a lot of paddy field could be replaced by high-income crops such as ginseng and fruit tree (peach) instead of relative low-income rice. More specific and widespread research on the remote sensing in the paddy field needs to be done.

  • PDF

Drone-based smart quarantine performance research (드론 기반 스마트 방재 방안 연구)

  • Yoo, Soonduck
    • The Journal of the Convergence on Culture Technology
    • /
    • v.6 no.2
    • /
    • pp.437-447
    • /
    • 2020
  • The purpose of this study is to research the countermeasures and expected effects through the use of drones in the field of disaster prevention as a drone-based smart quarantine performance method. The environmental, market, and technological approaches to the review of the current quarantine performance task and its countermeasures are as follows. First, in terms of the environment, the effectiveness of the quarantine performance business using drone-based control is to broaden the utilization of forest, bird flu, livestock, facility areas, mosquito larvae, pests, and to simplify and provide various effective prevention systems such as AI and cholera. Second, in terms of market, the standardization of livestock and livestock quarantine laws and regulations according to the use of disinfection and quarantine missions using domestic standardized drones through the introduction of new technologies in the quarantine method, shared growth of related industries and discovery of new markets, and animal disease prevention It brings about the effect of annual budget savings. Third, the technical aspects are (1) on-site application of disinfection and prevention using multi-drone, a new form of animal disease prevention, (2) innovation in the drone industry software field, and (3) diversification of the industry with an integrated drone control / control system applicable to various markets. (4) Big data drone moving path 3D spatial information analysis precise drone traffic information ensures high flight safety, (5) Multiple drones can simultaneously auto-operate and fly, enabling low-cost, high-efficiency system deployment, (6) High precision that this was considered due to the increase in drone users by sector due to the necessity of airplane technology. This study was prepared based on literature surveys and expert opinions, and the future research field needs to prove its effectiveness based on empirical data on drone-based services. The expected effect of this study is to contribute to the active use of drones for disaster prevention work and to establish policies related to them.

Development of Decision Tree Software and Protein Profiling using Surface Enhanced laser Desorption/lonization - Time of Flight - Mass Spectrometry (SELDI-TOF-MS) in Papillary Thyroid Cancer (의사결정트리 프로그램 개발 및 갑상선유두암에서 질량분석법을 이용한 단백질 패턴 분석)

  • Yoon, Joon-Kee;Lee, Jun;An, Young-Sil;Park, Bok-Nam;Yoon, Seok-Nam
    • Nuclear Medicine and Molecular Imaging
    • /
    • v.41 no.4
    • /
    • pp.299-308
    • /
    • 2007
  • Purpose: The aim of this study was to develop a bioinformatics software and to test it in serum samples of papillary thyroid cancer using mass spectrometry (SELDI-TOF-MS). Materials and Methods: Development of 'Protein analysis' software performing decision tree analysis was done by customizing C4.5. Sixty-one serum samples from 27 papillary thyroid cancer, 17 autoimmune thyroiditis, 17 controls were applied to 2 types of protein chips, CM10 (weak cation exchange) and IMAC3 (metal binding - Cu). Mass spectrometry was performed to reveal the protein expression profiles. Decision trees were generated using 'Protein analysis' software, and automatically detected biomarker candidates. Validation analysis was performed for CM10 chip by random sampling. Results: Decision tree software, which can perform training and validation from profiling data, was developed. For CM10 and IMAC3 chips, 23 of 113 and 8 of 41 protein peaks were significantly different among 3 groups (p<0.05), respectively. Decision tree correctly classified 3 groups with an error rate of 3.3% for CM10 and 2.0% for IMAC3, and 4 and 7 biomarker candidates were detected respectively. In 2 group comparisons, all cancer samples were correctly discriminated from non-cancer samples (error rate = 0%) for CM10 by single node and for IMAC3 by multiple nodes. Validation results from 5 test sets revealed SELDI-TOF-MS and decision tree correctly differentiated cancers from non-cancers (54/55, 98%), while predictability was moderate in 3 group classification (36/55, 65%). Conclusion: Our in-house software was able to successfully build decision trees and detect biomarker candidates, therefore it could be useful for biomarker discovery and clinical follow up of papillary thyroid cancer.

UAV SAR Target Detection Modeling Using STK (STK를 이용한 UAV SAR 목표물 탐지기법)

  • Hwang, Sung-Uk;Kim, Ah-Leum;Song, Jung-Hwan;Lee, Woo-Kyung
    • Journal of Satellite, Information and Communications
    • /
    • v.4 no.2
    • /
    • pp.12-19
    • /
    • 2009
  • In the modern UAV systems, the role of radar payload has been increasing with its unique performance of day-and-night operation and see-through capability over hidden obstacles. Contrary to the satellite reconnaissance, UAV is expected to provide high resolution target detection and recognition capability while frequent flight missions would deliver enhanced SAR image and local information over the target area. STK(Satellite Tool Kit) is a professional space-analysis software widely used in all phases of a space system's life cycle. The simulation of STK is efficient and accurate relatively. In this paper, the author attempt to model the UAV operation and measure the expected SAR image quality. STK(Satellite Tool Kit) is employed to analyze UAV operation and produce SAR raw data. A SAR simulator is developed to produce high resolution SAR image for various ground targets.

  • PDF

Introduction to High-Performance ERC32 Processor for the Development of Flight Software (차세대 위성용 탑재소프트웨어 개발을 위한 고성능 탑재컴퓨터 ERC32 프로세서 소개)

  • Lee Jae-Seung;Choi Jong-Wook;Chae Dong-Seok;Lee Jong-In;Kim Hak-Jung
    • Proceedings of the Korean Information Science Society Conference
    • /
    • 2005.11a
    • /
    • pp.475-477
    • /
    • 2005
  • 국내에서 개발된 저궤도 관측위성에는 인텔계열의 프로세서가 사용되어 졌다. 인텔계열의 프로세서를 이용한 임베디드 시스템은 다양하고 상세한 기술문서들이 많이 제공될 수 있고 국내에도 관련된 기술 습득이 이루어져 있다는 장점이 있다. 그러나 프로세서에 대한 새로운 기술의 개발 및 적용이 단기간에 이루어지기 때문에 이를 이용한 시스템 개발에 계속적으로 개발비용 부담이 가중되고 선진국의 첨단기술 유출 방지를 위한 여러 규제들로 인해 인텔 계열의 프로세서를 사용한 위성용 임베디드 시스템 개발에 걸림돌이 되고 있다. 이러한 문제점들을 해결하기 위해 차세대 위성에 사용 가능한 탑재컴퓨터에 대한 조사 및 기술분석을 수행하였으며, 유럽에서 자체적으로 개발하여 위성용 탑재컴퓨터로 사용하고 있는 MCM-ERC52가 차세대 위성개발에 적합한 것으로 판단되었다. MCM-ERC32는 SPARC v.7을 기반으로 한 ERC32SC 프로세서를 이용한 탑재컴퓨터 보드로 향후 위성에 요구되는 다양한 기능들을 수행하기에 충분한 고성능 탑재컴퓨터이다. 국내에서는 MCM-ERC32를 이용한 개발 경험이 전무한 상황이며, 관련된 기술자료도 충분하지 않은 실정이다. 이에 따라 MCM-ERC32에 적합한 저궤도 위성용 탑재소프트웨어 개발을 위한 연구가 진행되고 있으며. 본 논문에서는 MCM-ERC32를 이용한 탑재소프트웨어 개발에 필요한 특징적인 ERC32 프로세서의 개념과 기능에 대해 소개하고자 한다.

  • PDF

Optimal Satellite Constellation Design for Korean Navigation Satellite System (한국형 위성항법시스템을 위한 위성군집궤도 최적 설계)

  • Kim, Han Byeol;Kim, Heung Seob
    • Journal of Korean Society of Industrial and Systems Engineering
    • /
    • v.39 no.3
    • /
    • pp.1-9
    • /
    • 2016
  • NSS (Navigation satellite system) provides the information for determining the position, velocity and time of users in real time using satellite-networking, and is classified into GNSS (Global NSS) and RNSS (Regional NSS). Although GNSS services for global users, the exactitude of provided information is dissatisfied with the degree required in modern systems such as unmanned system, autonomous navigation system for aircraft, ship and others, air-traffic control system. Especially, due to concern about the monopoly status of the countries operating it, some other countries have already considered establishing RNSS. The RNSS services for users within a specific area, however, it not only gives more precise information than those from GNSS, but also can be operated independently from the NSS of other countries. Thus, for Korean RNSS, this paper suggests the methodology to design the satellite constellation considering the regional features of Korean Peninsula. It intends to determine the orbits and the arrangement of navigation satellites for minimizing PDOP (Position dilution of precision). PGA (Parallel Genetic Algorithm) geared to solve this nonlinear optimization problem is proposed and STK (System tool kit) software is used for simulating their space flight. The PGA is composed of several GAs and iterates the process that they search the solution for a problem during the pre-specified generations, and then mutually exchange the superior solutions investigated by each GA. Numerical experiments were performed with increasing from four to seven satellites for Korean RNSS. When the RNSS was established by seven satellites, the time ratio that PDOP was measured to less than 5 (i.e. better than 'Good' level on the meaning of the PDOP value) was found to 94.3% and PDOP was always kept at 10 or less (i.e. better than 'Moderate' level).

Dynamic Modeling based Flight Control of Hexa-Rotor Helicopter System (헥사로터형 헬리콥터의 동역학 모델기반 비행제어)

  • Han, Jae-Gyun;Jin, Taeseok
    • Journal of the Korean Institute of Intelligent Systems
    • /
    • v.25 no.4
    • /
    • pp.398-404
    • /
    • 2015
  • In this paper, we describe the design and performance of a prototype multi-rotor unmaned aerial vehicle( UAV) platform featuring an inertial measurement unit(IMU) based autonomous-flying for use in bluetooth communication environments. Although there has been a fair amount of study of free-flying UAV with multi-rotors, the more recent trend has been to outfit hexarotor helicopter with gimbal to support various services. This paper introduces the hardware and software systems toward very compact and autonomous hexarotors, where they can perform search, rescue, and surveillance missions without external assistance systems like ground station computers, high-performance remote control devices or vision system. The proposed system comprises the construction of the test hexarotor platform, the implementation of an IMU, mathematical modeling and simulation in the helicopter. Furthermore, the hexarotor helicopter with implemented IMU is connected with a micro controller unit(MCU)(ARM-cortex) board. The micro-controller is able to command the rotational speed of the rotors and to get the measurements of the IMU as input signals. The control simulation and experiment on the real system are implemented in the test platform, evaluated and compared against each other.

Position Estimation of a Missile Using Three High-Resolution Range Profiles (3개의 고 분해능 거리 프로파일을 이용한 유도탄의 위치 추정)

  • Yang, Jae-Won;Ryu, Chung-Ho;Lee, Dong-Ju
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.29 no.7
    • /
    • pp.532-539
    • /
    • 2018
  • A position estimation technique is presented for a missile using high-resolution range profiles obtained by three wideband radars. Radar measures a target range using a reflected signal from the surface of a missile. However, it is difficult to obtain the range between the radar and the origin of the missile. For this reason, the interior angle between the moving missile and tracking radar is calculated, and a compensated range between surface of the missile and its origin is added to the tracking range of the radar. Therefore, position estimation of a missile can be achieved by using three total ranges from each radar to the origin of the missile. To verify the position estimation of the missile, electromagnetic numerical analysis software was used to prove the compensated range according to the flight position. Moreover, a wideband radar operating at 500-MHz bandwidth was applied, and its range profile was used for the position estimation of a missile.

Flap Design Optimization for KLA-100 Aircraft in compliance with Airworthiness Certification (인증규정을 고려한 KLA-100항공기 고양력장치 최적화 설계)

  • Park, Jinhwan;Tyan, Maxim;Nguyen, Nhu Van;Kim, Sangho;Lee, Jae-Woo
    • Journal of the Korean Society for Aeronautical & Space Sciences
    • /
    • v.41 no.8
    • /
    • pp.649-656
    • /
    • 2013
  • High-lift devices have a major influence on takeoff, landing and stall performance of an aircraft. Therefore, a slotted flap design optimization process is proposed in this paper to obtain the most effective flap configuration from supported 2D flap configuration. Flap deflection, Gap and Overlap are considered as main contributors to flap lift increment. ANSYS Fluent 13.0.0$^{(R)}$ is used as aerodynamic analysis software that provides accurate solution at given flight conditions. Optimum configuration is obtained by Sequential Quadratic Programing (SQP) algorithm. Performance of the aircraft with optimized flap is estimated using Aircraft Design Synthesis Program (ADSP), the in-house performance analysis code. Obtained parameters such as takeoff, landing distance and stall speed met KAS-VLA airworthiness requirements.

A Study on Development and Validation of DIP to Application of Aircraft Database in Rea- Time Simulator Environment (실시간 시뮬레이터 환경에서 항공기 데이터베이스 적용을 위한 DIP 개발 및 검증에 관한 연구)

  • Kang, Im-Ju;Kim, Chong-Sup;Lee, Gi-Beom;Ahn, Sung-Jun;Shin, Sun-Young;Cho, In-Je;Ahn, Jong-Min
    • Journal of the Korean Society for Aeronautical & Space Sciences
    • /
    • v.36 no.8
    • /
    • pp.807-815
    • /
    • 2008
  • In this paper, design, development and evaluation of DIP(Database Interface Program) are presented. The main purpose of this study is to improve the simulation quality to get more realistic response of target system. The designed and developed major function is composed of flexible memory structure, efficient arithmetic database language and high speed interpolation/extrapolation algorithm. To evaluate the operation speed and accuracy of returned data, trim simulation is performed based on in-house software and, DIP is applied to existing real-time simulator such as engineering HQS(Handling Quality Simulator) to evaluate reliability and performance. The result of evlaution reveals that calculation speed and data accuracy are satisfied, and flight performance is satisfied in the real-time simulator environments.