• 제목/요약/키워드: Mechanical system

검색결과 19,894건 처리시간 0.045초

Dynamics of electric system for electromechanical integrated toroidal drive under mechanical disturbance

  • Hao, Xiuhong;Xu, Lizhong
    • Interaction and multiscale mechanics
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    • 제2권2호
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    • pp.189-207
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    • 2009
  • Dynamics of the electric system for the toroidal drive under mechanical disturbance is presented. Using the method of perturbation, free vibrations of the electric system under mechanical disturbance are studied. The forced responses of the electric system to voltage excitation under mechanical disturbance are also presented. We show that as the time grows, the resonance vibration caused by voltage excitation still exists and the vibrations caused by mechanical disturbance are enlarged. The coupled resonance vibration caused by mechanical disturbance and voltage excitation is discussed. The conditions of the occurrence of coupled resonance are studied.

기계설비산업의 생산체계 선진화방안 (Improvement Plan of Mechanical System in Construction Industry Production Process)

  • 박종일;박률
    • 설비공학논문집
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    • 제23권6호
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    • pp.470-476
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    • 2011
  • The aim of this paper is improvement plan of mechanical field construct production system in Korea construction industry market. Recently Korea's construction production system is changing rapidly. While change, mechanical system construction field must prepare proper system for construction production system and later mechanical construction work will give order directly. Through this study the author will show the improved mechanical field construct production system and it can useful future construction industry production system in Korea.

기계설비산업의 생산체계 선진화방안 (Improvement Plan of Mechanical System in Construction Industry Production Process)

  • 박종일;박률
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2009년도 하계학술발표대회 논문집
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    • pp.1112-1118
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    • 2009
  • The aim of this paper is improvement plan of mechanical field construct production system in Korea construction industry market. Recently Korea's construction production system is changing rapidly. While change, mechanical system construction field must prepare proper system for construction production system and later mechanical construction work will give order directly. Through this study the author will show the improved mechanical field construct production system and it can useful future construction industry production system in Korea.

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Design of a Moving-magnet Electromagnetic Actuator for Fast Steering Mirror through Finite Element Simulation Method

  • Long, Yongjun;Mo, Jinqiu;Wei, Xiaohui;Wang, Chunlei;Wang, Shigang
    • Journal of Magnetics
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    • 제19권3호
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    • pp.300-308
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    • 2014
  • This paper develops a moving-magnet electromagnetic actuator for fast steering mirror (FSM). The actuator achieves a reasonable compromise between voice coil actuator and piezoelectric actuator. The stroke of the actuator is between the strokes of a piezoelectric actuator and a voice coil actuator, and its force output is a linear function of air gap and excitation current within our FSM travel range. Additionally, the actuator is more reliable than voice coil actuator as the electrical connection in the actuator is static. Analytically modeling the actuator is difficult and time-consuming. Alternatively, numerous finite element simulations are carried out for the actuator analysis and design. According to the design results, a real prototype of the actuator is fabricated. An experimental test system is then built. Using the test system, the force output of the fabricated actuator is evaluated. The test results validate the actuator analysis and design.

Development of compact platform for low altitude remote sensing

  • Yamanaka, Daisuke;Namie, Taisuke;Tanaka, Motohiro;Kumano, Shinichi;Ishimatsu, Takakazu;Ueda, Mitsuaki;Moromugi, Shunji;Onodera, K.;Onodera, Kazuichi
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2005년도 ICCAS
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    • pp.1863-1866
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    • 2005
  • In this paper we propose a platform that is applicable to low altitude remote sensing. Basic idea of the platform is based on the model helicopter. On big difference from the conventional model helicopter is that our platform has four main rotors. Furthermore, vision control strategy is introduced so that operator can use the platform without any specialized intensive knowledge

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Interferometric Snapshot Spectro-ellipsometry: Calibration and Systematic Error Analysis

  • Dembele, Vamara;Choi, Inho;Kheiryzadehkhanghah, Saeid;Choi, Sukhyun;Kim, Junho;Kim, Cheong Song;Kim, Daesuk
    • Current Optics and Photonics
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    • 제4권4호
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    • pp.345-352
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    • 2020
  • We describe a calibration method to improve the accuracy of interferometric snapshot spectroscopic ellipsometry employing a dual-spectrometer sensor scheme. Conventional spectral wavelength calibration of a spectrometer has been performed by using a calibration lamp having multiple peaks at specific wavelength. This paper shows that such a conventional spectrometer calibration method is inappropriate for the proposed interferometric snapshot spectroscopic ellipsometry to obtain highly accurate ellipsometric phase information. And also, systematic error analysis of interferometric snapshot spectroscopic ellipsometry is conducted experimentally.

강성 구속기계계의 해법에 관한 연구 (A Study on Numerical Solution Methods in Stiff Constrained Mechanical Systems)

  • 한형석;박태원
    • 대한기계학회논문집
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    • 제19권2호
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    • pp.374-381
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    • 1995
  • In this paper, integration methods for stiff constrained mechanical systems are studied to analyze dynamic response of the stiff mechanical system efficiently. The stiff, non-stiff systems are identified by using eigenvalues of the Jacobian of the systems. To integrate both stiff system and non-stiff system efficiently a new switching method between the non-stiff differential equation solver and the stiff differential equation solver is presented.

RecurDyn과 Matlab/Simulink를 연동한 전동기 구동시스템의 시뮬레이션 (Co-Simulation for Electric Motor Drive System Using RecurDyn and Matlab with Simulink)

  • 김상훈
    • 산업기술연구
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    • 제27권A호
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    • pp.163-168
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    • 2007
  • For an accurate computer simulation to motor drive systems, the target mechanical load system driven by a motor needs to be model its characteristics accurately. In general, a load system is modeled simply with system parameters such as approximated system inertia and friction. So, simulation results have some errors compared with experimental results for a real load system. RecurDyn is a mechanics simulation program for 3-dimension analysis to mechanical load systems. From this program, parameters such as a load torque, a system inertia and a viscous friction can be obtained accurately which are required to model a mechanical system. Also, this program operates together Matlab/Simulink which is used to simulate electrical motor drive systems. So, an accurate simulation for the whole system with a motor drive system and a mechanical load is possible. This paper introduces an application of RecurDyn program to an electric forklift drive system using IPMSM(Interior Permanent Magnet Synchronous Motor) and examines the feasibility of co-simulation it with Matlab/Simulink.

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