• Title/Summary/Keyword: Select Control Actuator

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A Study on the Design Paramter of a Hydraulic Shift Actuator of an AMT (자동화 수동변속기의 변속 조작용 유압 액츄에이터의 설계 변수에 관한 연구)

  • Song, Chang-Seop;Lee, Sang-Hyun
    • Journal of the Korean Society for Precision Engineering
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    • v.24 no.10
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    • pp.75-82
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    • 2007
  • The AMT(Automated Manual Transmission) has been developed by utilizing the auto clutch system and the automatic shift mechanism, to automate the clutch operation and shift operation of the existing MT(Manual Transmission). The use of hydraulic actuator for each actuator of the clutch and gear has realized a reduction of fuel consumption and exhaust emission. In this paper, we develop a simulator for the transmission control system of the AMT using AMESim. The developed simulator can be applied to design the hydraulic select actuator system of an AMT.

Development of Automated Mechanical Transmission Model to Evaluate TCU Control Logic (TCU 제어로직 평가를 위한 AMT 모델 개발)

  • Oh, Joo-Young;Song, Chang-Sub
    • Journal of the Korean Society for Precision Engineering
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    • v.27 no.3
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    • pp.118-126
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    • 2010
  • The automated mechanical transmission(AMT) is composed of electronic control management(ECM) and automatic shift gear(ASG). The AMT has advantages which are high efficiency of manual transmissions(MT) and offer operation convenience similar to automatic transmissions(AT). However, it has defects that are the torque gap during gear shift transients and shift time is long. To reduce such defects, it is necessary practically to evaluate error and characteristics as developing simulation model before the control algorithm is applied. In this paper, models are composed of vehicle model and AMT shift control model. Particularly AMT shift control model consists of main clutch management model (MCM) and shift control management model(SCM). The developed models were verified by comparing the simulated and experimental results under the same operational conditions. It can also be used to evaluate shift algorithm.

Iterative Learning Control of Trajectory Generation for the Soft Actuator (궤적 생성 반복 학습을 통한 소프트 액추에이터 제어 연구)

  • Song, Eunjeong;Koo, Jachoon
    • The Journal of Korea Robotics Society
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    • v.16 no.1
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    • pp.35-40
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    • 2021
  • As the robot industry develops, industrial automation uses industrial robots in many parts of the manufacturing industry. However, rigidity-based conventional robots have a disadvantage in that they are challenging to use in environments where they grab fragile objects or interact with people because of their high rigidity. Therefore, researches on soft robot have been actively conducted. The soft robot can hold or manipulate fragile objects by using its compliance and has high safety even in an atypical environment with human interaction. However, these advantages are difficult to use in dynamic situations and control by the material's nonlinear behavior. However, for the soft robot to be used in the industry, control is essential. Therefore, in this paper, real-time PD control is applied, and the behavior of the soft actuator is analyzed by providing various waveforms as inputs. Also, Iterative learning control (ILC) is applied to reduce errors and select an ILC type suitable for soft actuators.

DEVELOPMENT OF DCT VEHICLE PERFORMANCE SIMULATOR TO EVALUATE SHIFT FORCE AND TORQUE INTERRUPTION

  • Park, S.J.;Ryu, W.S.;Song, J.G.;Kim, H.S.;Hwang, S.H.
    • International Journal of Automotive Technology
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    • v.7 no.2
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    • pp.161-166
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    • 2006
  • This paper presents shift characteristics of a dual clutch transmission(DCT). To obtain the shift force, dynamic models of the DCT are constructed by using MATLAB/Simulink and considering the rotational inertia of every component and the target pre-select time. Dynamic models of the shift and clutch actuators are derived based on the experimental results of the dynamic characteristics test. Based on the dynamic model of the DCT synchronizer, control actuator and vehicle model, a DCT vehicle performance simulator is developed. Using the simulator, the shift force and speed of the relevant shafts are obtained. In addition, the torque and acceleration of actuators are calculated during the shift process by considering the engaging and disengaging dynamics of the two clutches. It is observed from the performance simulator that uninterrupted torque can be transmitted by proper control of the two clutches.

Control of Rigid Robots Equipped with Brushed DC-Motors as Actuators

  • Hernandez-Guzman, Victor M.;Santibanez, Victor;Herrera, Gilberto
    • International Journal of Control, Automation, and Systems
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    • v.5 no.6
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    • pp.718-724
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    • 2007
  • We extend the application of an adaptive controller previously introduced in the literature under the assumption that no actuator dynamics exists to the case when the dynamics of the brushed DC-motors used as actuators is not neglected. Convergence to the desired positions is ensured without requiring any feedback to cope with the additional electric dynamics. The proposed control scheme does not require the exact knowledge of neither robot nor actuator parameters to select controller gains.

Active Vibration Control of a Plate Using the Distributed Modal Sensitivity (분포모달감도를 이용한 평판의 능동진동제어)

  • 송철기;박재상;이장무;황진권;최종호
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1995.04b
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    • pp.320-325
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    • 1995
  • This study deals with the active vibration control system for an all-clamped rectangular plate with piezoceramic actuators and sensors. A line nonent algorithm (LMA) with the distributed modal sensitivity(DMS) is proposed to reduce the structural vibrations effectively and to select the optimal locations and the optimal directions (skewed angles) of uniform piezoelectric actuators or sensors. Experimental results show that eachmode can attenuated byabout 10 .approx. 13 dB in case a piezoelectric actuator generate the psuedo-random disturbances that excite the plate modes.

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A study on development of hydraulic active suspension system (유압식 능동 현가시스템의 개발에 관한 연구)

  • 장성욱;박성환;이진걸
    • 제어로봇시스템학회:학술대회논문집
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    • 1996.10b
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    • pp.1459-1464
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    • 1996
  • The most important parameter for hydraulic active suspension system is to sustain desirable vehicle maneuvering stability and ride comfort without increasing consumption power. The performance of hydraulic active suspension system depends on damping force of body damping valve and piston damping valve. Hydraulic actuator design and damping valve parameter selection are essential and basic procedure to design hydraulic active suspension system. This paper is on computer simulation with use of mathematical model that was delivered from dynamic characteristic of hydraulic actuator, as know basic damping characteristics of hydraulic active suspension system. The aim of this paper is to select the system parameter that affect mainly hydraulic active suspension, and identify the validity on the system parameter selection.

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A Traveling Control System with the X-Y Table Actuator for Unmanned Operation in the Greenhouse (시설재배용 무인작업기를 위한 X-Y 테이블형 이동 시스템 개발)

  • 김채웅;이대원
    • Journal of Biosystems Engineering
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    • v.23 no.2
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    • pp.157-166
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    • 1998
  • In this study. a traveling control system was developed to transfer a machine without an operator in the working zone. The dimension of the system was modelized to design and construct smaller than that of real configuration of a greenhouse. For this system, the fixed path type was used to detect exact position during operating a manless machine. and the X-Y table actuator type to escape a unique path, which had the disadvantage in a fixed path type environment. Based on the results of this research the following conclusions were made : 1. This system used two screws to move toward horizontal direction, and a Plate to reach at any points in the working zone. 2. The software combined the functions of path selection and motor operation to control into one program. The path selection program was a menu driven program written in Visual Basic, and the motor operation program was written in Borland C++ for actuating motors. 3. The path-select mode of the program was used by selecting the desired paths, and the user path-create mode by selecting a random path in the path-selection program. 4. The system proved to be a reliable system for operating a manless machine, since accuracy and precision to reach the positions were less than 1%.

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The determination of state feedback gains of XPTOS for disk drive servomechanism based on BESSEL filter prototype (XPTOS에 의한 디스크 드라이브 서보메커니즘의 구성시 BESSEL 필터 표준 함수에 근거한 상태피드백이득 결정)

  • Han, K.H.;Lee, J.S.
    • Proceedings of the KIEE Conference
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    • 1996.07b
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    • pp.980-983
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    • 1996
  • This paper presents the method of determining state feedback gains of XPTOS for disk drive servomechanism based BESSEL filter prototype. A typical disk drive actuator can be modeled as second order dynamics for low frequencies. However, the response at higher frequencies shows resonant behavior which cannot be easily modeled. XPTOS consists of the nonlinear control region and the linear control region. In the linear control region, the poles of a second order nominal model of plant must be properly relocated by pole placement technique to attenuate resonant modes at high frequency and to attain minimum time state transition. It is difficult to select position to satisfy this object because velocity feedback gain is subjected to position feedback gain in XPTOS. Here poles of BESSEL filter prototype are selected to determine state feedback gains of XPTOS. Simulation results for disk drive servomechanism using XPTOS having state feedback gains by the proposed method are presented.

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Model-Following Control in Random Access Deviecs for Velocity Performance Enhancement (랜덤액세스 장치의 속도성능 향상을 위한 모델추종 제어기의 적용)

  • Lee, J.H;Park, K.H;Kim, S.H;Kwak, Y.K
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.20 no.1
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    • pp.115-126
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    • 1996
  • In the time optimal control problem, bang-bang control has been used becaese it is the theoretical time minimum solution. However, to improve tracking speed performance in the time optimal control, it is important to select a switching point accurately which makes the velocity zero near the target track. But it is not easy to select the swiching point accurately because of the damping coefficient variation and uncertainties of modeling an actual system. The Adaptive model following control(AMFC) is implemented to relieve the difficulty and inconvenience of this task. The AMFC and make the controlled plant follow as closely as possible to a desired reference model whose switching point can be calculated easily and accurately, assuring the error between the states of the reference model and those of the controlled plant appoaches zero. The hybrid control method composed of AMFC and PID is applied to a tracking actuator of the magneto optical disk drive(MODD) in random access devices to improve its slow tracking performance. According to the simulaion and experimental results, the average tracking time as small as 20ms is obtained for a 3.5 magneto-optical disk drive. The AMFC also can be applied for other random access devices to improve the average tracking performance.