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Angular Deflection

The Experts below are selected from a list of 294 Experts worldwide ranked by ideXlab platform

Chang Hyeon Ji – 1st expert on this subject based on the ideXlab platform

  • Electromagnetic micromirror array with single-crystal silicon mirror plate and aluminum spring
    Journal of Lightwave Technology, 2003
    Co-Authors: Chang Hyeon Ji

    Abstract:

    We have designed and fabricated an addressable 4 /spl times/ 4 array of micromirrors capable of providing up to 90/spl deg/ of Angular Deflection. Each micromirror comprises a single-crystalline silicon mirror plate supported by aluminum springs, which provides an extremely flat reflective surface and a compliant spring material that enables the integration of the device into a limited area without mitigating its performance (i.e., total Angular Deflection). The device is fabricated using a combination of surface and bulk micromachining processes, such as electroplating, bulk wet etching and XeF/sub 2/ etch processes. Selective actuation is accomplished by the use of an electrostatic clamping force on each mirror plate. A mirror rotation angle of more than 80/spl deg/ can be obtained by applying an external magnetic field, and this angle can be further increased by the use of an electrostatic force. The designed structure can be used in microphotonic applications.

  • Electromagnetic micromirror array with single-crystal silicon mirror plate and aluminum spring
    Journal of Lightwave Technology, 2003
    Co-Authors: Chang Hyeon Ji

    Abstract:

    We have designed and fabricated an addressable 4 × 4 array of micromirrors capable of providing up to 90° of Angular Deflection. Each micromirror comprises a single-crystalline silicon mirror plate supported by aluminum springs, which provides an extremely flat reflective surface and a compliant spring material that enables the integration of the device into a limited area without mitigating its performance (i.e., total Angular Deflection). The device is fabricated using a combination of surface and bulk micromachining processes, such as electroplating, bulk wet etching and XeF2 etch processes. Selective actuation is accomplished by the use of an electrostatic clamping force on each mirror plate. A mirror rotation angle of more than 80° can be obtained by applying an external magnetic field, and this angle can be further increased by the use of an electrostatic force. The designed structure can be used in microphotonic applications.

  • Design and fabrication of magnetically driven micromirror with large Angular Deflection
    Digest of Papers Microprocesses and Nanotechnology 2000. 2000 International Microprocesses and Nanotechnology Conference (IEEE Cat. No.00EX387), 2000
    Co-Authors: Chang Hyeon Ji

    Abstract:

    In this research we have designed and fabricated electromagnetically driven micromirror by combination of surface and bulk micromachining processes. Individual mirror plate and springs occupy relatively small area of 300/spl times/300 /spl mu/m/sup 2/. To obtain flat mirror surface, bulk silicon of thickness ranging from 10 to 20 /spl mu/m is used as a mirror plate. For the mirror plate to have substantial amount of Angular Deflection, aluminum is used as a spring material and crab-leg shaped spring is used.

M. E. El-hawary – 2nd expert on this subject based on the ideXlab platform

  • Rotor angle wind turbine energy capture control
    2015 IEEE 28th Canadian Conference on Electrical and Computer Engineering (CCECE), 2015
    Co-Authors: Abdulrazig Alarabi, M. E. El-hawary

    Abstract:

    In wind turbines the power generation (power capture) and output torque depends on wind speed. Due to the rapid variations in wind speed, wind and inflow angle evaluating the output power becomes a challenging problem. Many optimization control techniques seek to extract the output power continuously. This paper focusses on dynamic analysis and control of variable wind turbine’s rotor yaw angle and Angular Deflection. Earlier work used wind direction and pitch angle to control the performance of wind turbine. Using rotor yaw and Angular Deflection control of horizontal and vertical axis wind turbines is relatively new. For dynamic analysis, rotor yaw and rotor Angular Deflection, model techniques and experimental setup mechanisms were done in detail. Simulations were carried out in C++ to program an Arduino microcontroller and motor driver. Matlab software was used to interface wind turbine experimental setup, Arduino microcontroller and show the functions and aerodynamic forces. The result shows that the performance of wind turbine with this technique gives better result by increasing the power capture by about 15% more.

  • CCECE – Rotor angle wind turbine energy capture control
    2015 IEEE 28th Canadian Conference on Electrical and Computer Engineering (CCECE), 2015
    Co-Authors: Abdulrazig Alarabi, M. E. El-hawary

    Abstract:

    In wind turbines the power generation (power capture) and output torque depends on wind speed. Due to the rapid variations in wind speed, wind and inflow angle evaluating the output power becomes a challenging problem. Many optimization control techniques seek to extract the output power continuously. This paper focusses on dynamic analysis and control of variable wind turbine’s rotor yaw angle and Angular Deflection. Earlier work used wind direction and pitch angle to control the performance of wind turbine. Using rotor yaw and Angular Deflection control of horizontal and vertical axis wind turbines is relatively new. For dynamic analysis, rotor yaw and rotor Angular Deflection, model techniques and experimental setup mechanisms were done in detail. Simulations were carried out in C++ to program an Arduino microcontroller and motor driver. Matlab software was used to interface wind turbine experimental setup, Arduino microcontroller and show the functions and aerodynamic forces. The result shows that the performance of wind turbine with this technique gives better result by increasing the power capture by about 15% more.

Abdulrazig Alarabi – 3rd expert on this subject based on the ideXlab platform

  • Rotor angle wind turbine energy capture control
    2015 IEEE 28th Canadian Conference on Electrical and Computer Engineering (CCECE), 2015
    Co-Authors: Abdulrazig Alarabi, M. E. El-hawary

    Abstract:

    In wind turbines the power generation (power capture) and output torque depends on wind speed. Due to the rapid variations in wind speed, wind and inflow angle evaluating the output power becomes a challenging problem. Many optimization control techniques seek to extract the output power continuously. This paper focusses on dynamic analysis and control of variable wind turbine’s rotor yaw angle and Angular Deflection. Earlier work used wind direction and pitch angle to control the performance of wind turbine. Using rotor yaw and Angular Deflection control of horizontal and vertical axis wind turbines is relatively new. For dynamic analysis, rotor yaw and rotor Angular Deflection, model techniques and experimental setup mechanisms were done in detail. Simulations were carried out in C++ to program an Arduino microcontroller and motor driver. Matlab software was used to interface wind turbine experimental setup, Arduino microcontroller and show the functions and aerodynamic forces. The result shows that the performance of wind turbine with this technique gives better result by increasing the power capture by about 15% more.

  • CCECE – Rotor angle wind turbine energy capture control
    2015 IEEE 28th Canadian Conference on Electrical and Computer Engineering (CCECE), 2015
    Co-Authors: Abdulrazig Alarabi, M. E. El-hawary

    Abstract:

    In wind turbines the power generation (power capture) and output torque depends on wind speed. Due to the rapid variations in wind speed, wind and inflow angle evaluating the output power becomes a challenging problem. Many optimization control techniques seek to extract the output power continuously. This paper focusses on dynamic analysis and control of variable wind turbine’s rotor yaw angle and Angular Deflection. Earlier work used wind direction and pitch angle to control the performance of wind turbine. Using rotor yaw and Angular Deflection control of horizontal and vertical axis wind turbines is relatively new. For dynamic analysis, rotor yaw and rotor Angular Deflection, model techniques and experimental setup mechanisms were done in detail. Simulations were carried out in C++ to program an Arduino microcontroller and motor driver. Matlab software was used to interface wind turbine experimental setup, Arduino microcontroller and show the functions and aerodynamic forces. The result shows that the performance of wind turbine with this technique gives better result by increasing the power capture by about 15% more.