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Development and Control Strategies of an Unmanned Autonomous Forklift
홍금식(Keum-Shik Hong),김민환(Min-Hwan Kim),이석(Suk Lee),김성신(Seong-Sin Kim),홍봉희(Bong Hee Hong),위디오트리앗모 아우기(A. Widyotriatmo),브이티탄 규엔(Quyen T. T. Bui),이정훈(Jung Hun Lee),탐바 투아 아구스티누스(Tua A. Tamba) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
This paper presents the control strategies for the development of an unmanned autonomous forklift. A control architecture using several sensors (vision, ultrasonic sensor, laser range finder, etc.) and a PC controller is presented. An ultrasonic satellite and gyro are used for the localization, and a vision system is utilized for obstacle detection and the measurement of pallet position. The CAN communication network is utilized to provide the drive-by-wire technology for the unmanned autonomous forklift.
컨테이너 크레인의 흔들림 제어 ( Part I ) : 모델링, 제어전략, 기준선도를 통한 오차 피이드백 제어
홍금식,손성철,이만형,Hong, Keum-Shik,Sohn, Sung-Chull,Lee, Man-Hyung 제어·로봇·시스템학회 1997 제어·로봇·시스템학회 논문지 Vol.3 No.1
The sway control problem of pendulum motion of a container hanging on a Portainer Crane, which transports containers from a container ship to trucks, is considered in the paper. The equations of motion are obtained through the Lagrange mechanics and simplified for control purposes. Considering that the fast traveling of trolley and no residual swing motion of the container at the end of acceleration and deceleration are crucial for quick transportation, several velocity patterns of trolley movement including the time-optimal control are investigated. Incorporating the change of rope length, a reference swing trajectory is introduced in the control loop and the error signal between the reference sway angle and the measured sway angle is feedbacked. Proposed control strategy is shown to be robust to disturbances like winds and initial sway motion.