• Title/Summary/Keyword: Control Stick

Search Result 160, Processing Time 0.021 seconds

Precision Stabilization Control of Servo-system by Using Friction Compensation (마찰보상을 통한 서어보제어계의 정밀 안정화 제어)

  • Kang, Min-Sig
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.16 no.3 s.96
    • /
    • pp.109-115
    • /
    • 1999
  • This paper presents a stabilization control designed to improve position stabilization performance of a position servo-system(turret) mounted on a manuvering platform(vehicle). In the consideration of the motion of the platform, a dynamic model of the stabilization system is derived and shows the viscous and stick-slip friction torques are the major source of stabilization errors. An extended generalized minimum variance control which consists of a feedforward disturbance compensation as well as a pole placement feedback control is suggested to reduce the stabilization errors caused from the friction disturbances. This modeling and control are applied to a small experimental set-up and the experimental results confirm the accuracy of the model and the effectiveness of the suggested control.

  • PDF

Contact Stress Analysis of Stick Type Ignition Coil Jacket PET (Stick Type Ignition Coil Jacket PET의 접촉응력 해석)

  • Kim Yang-Sul
    • Journal of the Korean Society of Safety
    • /
    • v.20 no.1 s.69
    • /
    • pp.1-6
    • /
    • 2005
  • Stick type ignition coil is new development that connect directly with ECU(Electronic control unit), without needing a spark plug cable and distributor. Glass-fiber reinforced ploymeric composites provide the desirable properties of high stiffness and strength as well as low specific weight. Stick type ignition coil jacket is using PBT CF30 resin. PBT CF30 resin is a kind of electric insulation which is a superior engineering plastic that is used to prevent the leakage of the electrical current. If PET receive a mistake of design or excessive force when HV terminal oppress on jacket, it can happen to crack. Local stress concentrations occurring on the contact surface, the contact phenomenon becomes a direct cause to the wear and failure of mechanical structures. When it is cracked, it can allow a leakage of the electrical current. So, in this study, we analyze the contact stress to PBT jacket using ANSYS program, when HV terminal oppress on jacket. We suppose PBT to be Jacket and we analyzed contact stress that happens in PET like PBT analysis method. We compared the use of PBT and PET.

Adaptive High Precision Control of Dynamic System Using Friction Compensation Schemes (마찰력 보상 기법을 이용한 동적 시스템의 고 정밀 적응제어)

  • Jeon, Buyng-Gyoon;Jeon, Gi-Joon
    • The Transactions of the Korean Institute of Electrical Engineers D
    • /
    • v.49 no.10
    • /
    • pp.555-562
    • /
    • 2000
  • We propose an adaptive nonlinear control algorithm for compensation of the stick-slip friction in a dynamic system. The friction force and mass of the system are estimated and compensated by adaptive control law. Especially, as the nonlinear control input in a small tracking error zone is enlarged by the nonlinear function, the steady state error is significantly reduced. The proposed algorithm is a direct adaptive control method based on the Laypunov stability theory, and its convergence is guaranteed under the bounded noise or torque disturbance. We verified the performance of the proposed algorithm by computer simulation on one-DOF mechanical system with friction.

  • PDF

A Study on the Development of Control Loading System for Helicopter Flight Training Device (헬리콥터 비행훈련장치용 조종력재현장치의 개발에 관한 연구)

  • Han, Dong-Ju;Lee, Sang-Haeng
    • Transactions of the Korean Society of Mechanical Engineers A
    • /
    • v.31 no.10
    • /
    • pp.1031-1038
    • /
    • 2007
  • A study on the development of control loading system for a pilot command in the helicopter flight training device is performed. The key issue of the device is how to provide closely the real feeling of the stick forces to the trainer during the flight training. Focusing on this proviso and considering the suitable approach than the complexity of the hydraulic system, we adopt the AC servo motor system although its inherent disadvantages such as the torque ripple and the stick-slip friction effect at a low control force. However, we overcome these detrimental effects by introducing the appropriate control device and the robust structural design of the actuating system, thereby the feasibility and applicability to the system can be obtained by showing good performance, meeting the required specification.

Model-Based Rolling Motion Control of an One-wheeled Robot Considering the Pitching Motion of a Gyroscopic Effect (자이로 효과의 피칭 모션을 고려한 한 바퀴 로봇의 모델 기반 롤링 모션 제어)

  • Lee, Sang-Deok;Jung, Seul
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.65 no.2
    • /
    • pp.335-341
    • /
    • 2016
  • In general, a yawing motion concept is used for the lateral control of one wheel robot where the gimbal system is located horizontally. In this paper, another concept of the vertically located gimbal system is presented for the same purpose. Although the vertical concept undergoes an instability more easily than the horizontal one, the pitching motion of the gyroscopic effect is considered. Firstly, the trade-off relation between two balancing concepts are investigated by comparing the gyroscopic mechanism. Secondly, the dynamic model for the problem of the proposed concept is derived using the oscillatory inverted stick model. Thirdly, the stability of the model is analyzed using the phase trajectory method. Finally, the control performance of the system by a vibration controller is simulated.

Robust Digital Nonlinear Friction Compensation-Application (견실한 비선형 마찰보상 이산제어 - 응용)

  • Kang, M.S.;Song, W.G.;Kim, C.J.;Lee, S.K.
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.14 no.5
    • /
    • pp.108-117
    • /
    • 1997
  • To prove the stability and the effectiveness of the robust non-linear friction control suggested and proved analytically in the previous paper, the describing function analysis is introduced. The instability of the Southward's nonlinear friction compensation for a digital position control and the improvement of phase margin of the robust nonlinear friction compensation are verified qualitatively through the describing function analysis. Those controls are applied to a single-axis digital servo driving experimental setup which has inherent stick-slip friction and experimental results confirm the results obtained in and the effectiveness of the robust nonlinear friction compensation for a digital position control.

  • PDF

Control of Stick-Slip Friction with a CMAC (CMAC 제어기를 이용한 점착 미끄럼 마찰의 제어)

  • Park, J.H.
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.12 no.6
    • /
    • pp.45-51
    • /
    • 1995
  • This paper proposes a CMAC-based controller for servo systems with stick-slip friction. Performance of the controller was evaluated from computer simulations and compared with that of a conventional PID controller. Firction model used in the simulations is based upon the one proposed by Tustin. It was shown that the CMAC-based controller settles more quickly, and overshoots less than the PID. It was also shown that the CMAC is less sensitive to the changes of the plant parameters.

  • PDF

Fabrication of channel-integrated optoelectrofluidic device using stamp-to-stick bonding and microtransfer methods (Stamp-to-Stick Bonding 및 Microtransfer Molding 방법을 이용한 미세유체 채널이 집적된 광전기유체소자의 제작)

  • Hwang, Hyun-Goo;Lee, Do-Hyun;Park, Je-Kyun
    • Journal of Sensor Science and Technology
    • /
    • v.18 no.2
    • /
    • pp.154-159
    • /
    • 2009
  • This paper describes two methods - stamp-to-stick bonding and microtransfer molding - to integrate microfluidic channel into an optoelectrofluidic device for in-channel microparticle manipulation. We have demonstrated the optoelectronic microparticle manipulation in the channel-integrated optoelectrofluidic device using a liquid crystal display. As injecting a liquid sample containing $15{\mu}m$-diameter polystyrene particles into the fabricated channel, trapping and transport of individual microparticles have been successfully demonstrated. This channel-integrated optoelectrofluidic device may be useful for several in-channel applications based on the optoelectrofluidics such as optoelectronic flow control, droplet-based protein assay and bead-based immunoassay.

Streaming Stick Usability Comparison Test (스틱형 OTT 서비스의 사용성 평가)

  • Lee, Hyejin;Chung, Donghun
    • Journal of Korea Society of Digital Industry and Information Management
    • /
    • v.11 no.4
    • /
    • pp.129-141
    • /
    • 2015
  • This study evaluates user experience of streaming stick service through usability testing. Streaming stick services such as Roku, Chromecast, and Everoncast were tested in ten levels belonging to five usability variables that are composed of efficiency of use, accuracy, meaningfulness, flexibility, and consistency. Each variable has two levels respectively that are responsiveness, minimal action, error prevention, error detection, error recovery, understandability, learnability, substitutivity, predictability, and familiarity in order. Twenty five participants volunteerly joined this research, and the results showed that Roku is superior to another two OTTs in most levels and variables. It implies that participants prefer to remote control, many channels, and personalized service during experiencing the service.

An Implementation Control Stick and Flying Attitude in Flight Simulator (Flight Simulator에서의 조종간 조작에 따른 비행자세 구현 방법)

  • 한용식
    • Proceedings of the Korea Society for Simulation Conference
    • /
    • 1999.10a
    • /
    • pp.150-155
    • /
    • 1999
  • 비행 Simulator는 조종사가 실제 비행할 때와 같은 느낌을 받도록 구성되어야 하는데 조종사가 비행을 느끼게 되는 것은 여러 가지 감각기관을 통한 종합적인 느낌이다. 시각을 위하여 계기가 현재 비행 상태를 표시해야되고 외부 경치에서 고도, 속도, 자세 및 상승률을 감지하여야 한다. 이런 외부상태를 표시하기 위해서는 조종사의 Stick조작에 의한 비행기의 위치 변화와 속도 등을 실시간으로 계산하여 Graphic Engine과 Actuator로 데이터를 전송하여야 한다. 이러한 Parameter를 결정하기 위해서는 조정사의 조작에 의한 stick의 위치와 그로 인한 항공기의 자세 그리고 상태와 비행 속도 등에 따라 결정되며, 대상 항공기에 대한 제원으로 부터 조종사가 조종간의 이동크기와 조종면의 각 변위와의 관계를 계산하여 위치, 방향과 높이에 관한 Parameter를 계산해 줄 수 있는 방법 구현하였다.

  • PDF