IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
Volume 3 , Issue 9
Showing 1-3 articles out of 3 articles from the selected issue
LETTER
  • Tahir Khan, Muhammad Shafiq
    2006 Volume 3 Issue 9 Pages 184-190
    Published: 2006
    Released: May 10, 2006
    JOURNALS FREE ACCESS
    A novel adaptive inverse control (AIC) scheme is presented to facilitate on-line controller design of unknown nonlinear dynamic systems. The scheme is based on a control oriented model known as the U-model. The use of U-model alleviates the computational complexity of on-line nonlinear controller design that arises when using other modelling frame works such as NARMAX model. The effectiveness of the proposed scheme is illustrated by utilizing a laboratory scale nonlinear heating process as a test system.
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  • Kenichi Masuda, Atsushi Tate, Hiroyuki Tsuda
    2006 Volume 3 Issue 9 Pages 191-196
    Published: 2006
    Released: May 10, 2006
    JOURNALS FREE ACCESS
    We have proposed a novel 2 × 2 optical switch using multimode interference (MMI) coupler. This switch comprises four arms, located between two MMI couplers, and works by controlling a phase shifter, situated in each arm. Compared with conventional Mach-Zehnder type of optical switches, BPM simulation of this device predicted a high tolerance to fabrication errors. We fabricated the device with silica waveguides, and confirmed that it functioned with an insertion loss of 4.1dB and an extinction ratio of about 20dB.
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  • Kazuhiro Takahashi, Makoto Mita, Hiroyuki Fujita, Hiroshi Toshiyoshi
    2006 Volume 3 Issue 9 Pages 197-202
    Published: 2006
    Released: May 10, 2006
    JOURNALS FREE ACCESS
    We have developed novel device architecture of comb-driven double-gimbal XY-stage of high fill-factor (stage area / chip size), which has been realized for the first time by topologically separating the actuator elements in two layers: all the electrical parts (electrodes and interconnections) are in the Silicon-on-Insulator (SOI) layer, while the mechanical parts (suspensions, frame, and XY-stage) are in the substrate. Thanks to the new layered structures, the overall footprint of the actuator has been made small. The XY-stage moved 19µm in the X and the Y direction independently, and also in the diagonal direction.
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