• Title/Summary/Keyword: Oder Sensor

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다중센서를 이용한 로봇 손의 파지 제어

  • 이양희;서동수;박민용;이종원
    • 제어로봇시스템학회:학술대회논문집
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    • 1996.10b
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    • pp.694-697
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    • 1996
  • The aim of this work for 5 years from 1994 is to develop a multi-fingered robot hand and its control system for grasp and manipulation of objects dexterously. Since the robot hand is still being developed, a commercialized robot hand from Barrett Company is utilized to implement a hand controller and control algorithm. For this, VME based motion control and interface boards are developed and multi-sensors such as encoder, force/torque sensor, dynamic sensor and artificial skin sensor are partly developed and employed for the grasping control algorithm. In oder to handle uncertainties such as mechanical idleness and backlash, a fuzzy rule based grasping algorithm is also considered and tested with the developed control system.

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AERODYNAMIC DESIGN OF A VANE TYPE MULTI-FUNCTION AIR DATA SENSOR (베인형 다기능 대기 자료 센서의 공력 설계)

  • Park, Y.M.;Choi, I.H.;Lee, Y.G.;Kwon, K.J.;Kim, S.C;Hwang, I.H.
    • 한국전산유체공학회:학술대회논문집
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    • 2010.05a
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    • pp.43-49
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    • 2010
  • Aerodynamic design of the vane type multi-function probe was tried by using CFD and wind tunnel test for the MALE UAV and small business jets. The present multi-function probe can measure total pressure, static pressure and angle of attack by using rotating vane. Therefore major performances are determined by aerodynamic characteristics of vane. In oder to design the sensor compatible to the requirement, aerodynamic characteristics of sensors was investigated by using CFD and dynamic response analysis was also performed for trasient performance. The final aerodynamic performance was measured by the wind tunnel test at Aeorsonic and the results successfully used for the design of vane type multi-function air data sensor.

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Development of Odor Sensor Array using Pattern Classification Technology (패턴분류 기술을 이용한 후각센서 어레이 개발)

  • Park, Tae-Won;Lee, Jin-Ho;Cho, Young-Chung;Ahn, Chul
    • Proceedings of the SAREK Conference
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    • 2006.06a
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    • pp.454-459
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    • 2006
  • There are two main streams for pattern classification technology One is the method using PCA (Principal Component Analysis) and the other is the method using Neural network. Both of them have merits and demerits. In general, using PCA is so simple while using neural network can improve algorithm continually. Algorithm using neural network needs so many calculations rendering very slow response. In this work, an attempt is made to develop algorithms adopting both PCA and neural network merits for simpler, but faster and smarter.

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Development of Diagnosis Algorithm for 25.8kV N2 insulated Pad-mounted Switchgear (25.8kV급 N2 절연 지중다회로 개폐기 진단알고리즘 개발)

  • Kim, Chun-Won;Jang, Sung-Il;Choi, Jung-Hwan;Kim, Kwang-Ho
    • Journal of Industrial Technology
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    • v.34
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    • pp.67-70
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    • 2014
  • In this paper, we propose a diagnosis algorithm for 25.8kV $N_2$ insulated Pad-mounted Switchgear in oder to improve reliability by preventing of fault in advance. The proposed algorithm can diagnose the problems of Pad-mounted Switchgear such as gas leakage and VI(Vacuum Interrupter) trouble (contact abrasion, coil aging etc.) by using pressure sensor, stroke sensor and coil current sensor.

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A Study on Hierarchical Communication Method for Energy Efficiency in Sensor Network Environment (센서 네트워크 환경에서 에너지 효율을 위한 계층적 통신 기법에 관한 연구)

  • Son, Min-Young;Kim, Young-Hak
    • The Journal of the Korea institute of electronic communication sciences
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    • v.9 no.8
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    • pp.889-897
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    • 2014
  • With the development of wireless communication and sensor technology, sensor network applications in various fields have been applied. To minimize the power consumption of sensors in sensor network is one of the important factors in oder to extend the system life. The power consumption of each sensor within sensor network can be different depending on the communication method between head(sink) node and its node. In this paper, we propose a new hierarchical communication method to minimize the power consumption of each sensor. The proposed method divides the area of sensor network into four areas using divide-and-conquer method and selects the nearest node to head node in each area as a child node of the node. Next the hierarchical tree in the same way is constructed recursively until each area is no longer divided. Each sensor can communicate to head node using this hierarchical tree. The proposed results were compared with the previous methods through simulation, and showed excellent results in the energy efficiency of sensor network.

Comparison of detection rates Area sensors and 3D spatial division multiple sensors for detecting obstacles in the screen door (스크린도어의 장애물 검지를 위한 Area센서와 다중공간분할 3D센서의 검지율 비교 분석)

  • Yoo, Bong-Seok;Lee, Hyun-Su;Jin, Ju-Hyun;Kim, Jong-Sik
    • The Journal of the Korea institute of electronic communication sciences
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    • v.11 no.6
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    • pp.561-566
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    • 2016
  • A subway platform is equipped with screen doors in oder to avoid accidents of passengers, where Area sensors are installed for detecting obstacles in the screen doors. However, there exist frequent operating errors in screen doors due to dusts, sunlight, snow, and bugs. It is required to develope a detection device which reduces errors and elaborates detection function. In this paper, we compared the detection rates of the Area sensor the 3D sensor using CCTV-based image data with installing sensors at the screen door in Munyang station Daegu, where 3D sensor is applied with the space division multiple detection algorithms. It is measured that the detection rate of 3D sensor and Area sensor is approximately 89.61% and 78.88%, respectively. The results confirmed that 3D senor has higher detection rate compared with Area sensor with the rate of 6.87~9.79%, and 3D sensor has benefit in the aspect of installation fee.

Clustering Algorithm for Efficient Use of Energy in Wireless Sensor Network (무선 센서 네트워크의 효율적인 에너지 사용을 위한 클러스터링 알고리즘)

  • Kim, Tae-Hyoung;Kang, Geun-Taek;Lee, Won-Chang
    • Journal of the Korean Institute of Intelligent Systems
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    • v.20 no.1
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    • pp.36-41
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    • 2010
  • In oder to operate sensor networks effectively it is very important to use the energy in the individual nodes efficiently and so increase their lifetime. Cluster-based routing algorithms such as LEACH and HEED obtain the efficiency of energy using data transfer between cluster heads and its members. In this paper we analyze the typical cluster-based routing algorithms and suggest a new energy efficient method of electing the cluster heads with the maximum delay of dead nodes occurrence. The efficiency of the proposed algorithm is verified through MATLAB simulation.

A Position Control of an Electrical Fin Actuator for Guided Missile using TDC and ETDO (TDC와 ETDO를 이용한 유도무기용 전기식 날개구동장치의 위치제어)

  • Lee Young-Cheol;Lee Heung-Ho
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.55 no.8
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    • pp.353-362
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    • 2006
  • This paper illustrates the practical design procedure on a position control of an electrical fin actuator for the guided missile using Time Delay Control(TDC) and Enhanced Time Delay Observer(ETDO). Since TDC is robust to the model uncertainties such as the parameter variation and the external disturbance, it has been frequently used in nonlinear control systems. For a position control of an electrical fin actuator in the missile system, TDC requires the velocity sensor as well as the position sensor. To resolve the problems of the cost, the space and the malfunction due to the velocity sensor, ETDO is used as the velocity observer. ETDO is enhanced version of TDO that has the problems of the reconstruction errors and the restriction on selecting its gains. To maximize the control performance, the parameters of ETDO are optimized by using the genetic algorithm. The effectiveness of this approach is proved through a series of simulation studies and experiments, and the designed controller is compared with the typical TDC and TDC using the reduced oder observer.

Correlation between Subjective and Objective Assessments of Shock Signals Excited on a Vehicle Passing Bumps (범프 통과시 발생하는 충격신호에 대한 주관평가와 객관평가의 상관성 연구)

  • Yoo, Wan-Suk;Kim, Min-Seok;Jang, Han-Kee;Ahn, Se-Jin
    • Transactions of the Korean Society of Automotive Engineers
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    • v.13 no.2
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    • pp.29-36
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    • 2005
  • In oder to generate various shock signals in a field study, a passenger car was driven at several speeds over road profiles that included a number of half sine shaped bumps of various heights. A triaxial SAE pad sensor was mounted on the front passenger seat to measure the acceleration signals which might produce subjective discomfort. The measured accelerations were correlated with the subjective assessments of 14 subjects. The magnitude of subjective discomfort was found to be proportional to the VDV and also the peak to peak of the frequency weighted acceleration signal.

Development of Adaptive Moving Obstacle Avoidance Algorithm Based on Global Map using LRF sensor (LRF 센서를 이용한 글로벌 맵 기반의 적응형 이동 장애물 회피 알고리즘 개발)

  • Oh, Se-Kwon;Lee, You-Sang;Lee, Dae-Hyun;Kim, Young-Sung
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.13 no.5
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    • pp.377-388
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    • 2020
  • In this paper, the autonomous mobile robot whit only LRF sensors proposes an algorithm for avoiding moving obstacles in an environment where a global map containing fixed obstacles. First of all, in oder to avoid moving obstacles, moving obstacles are extracted using LRF distance sensor data and a global map. An ellipse-shaped safety radius is created using the sum of relative vector components between the extracted moving obstacles and of the autonomuos mobile robot. Considering the created safety radius, the autonomous mobile robot can avoid moving obstacles and reach the destination. To verify the proposed algorithm, use quantitative analysis methods to compare and analyze with existing algorithms. The analysis method compares the length and run time of the proposed algorithm with the length of the path of the existing algorithm based on the absence of a moving obstacle. The proposed algorithm can be avoided by taking into account the relative speed and direction of the moving obstacle, so both the route and the driving time show higher performance than the existing algorithm.