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A study on stability analysis of biochemical reaction system with negative feedback regulation |
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Takashi Nakakuki(Kyushu Institute of Technology, Japan) |
| In this paper, a simple and straightforward method based on Nyquist criterion is proposed. First, as a preliminaries we provide a short review on a Hopf bifurcation and the eigenvalue analysis of a biochemical reaction system with the Goodwin oscillator. Next, we show the proposed method in which it is a kind of describing function method, and the vector locus for the Nyquist criterion is drawn computationally by performing frequency response test for equivalent transfer function of the open loop system. Finally, some numerical results with the Goodwin oscillator are demonstrated.
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Interpolated Regression for On-line Local Modeling in Feedforward Learning Control |
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Kenji Sugimoto, Fuyuki Ito(Nara Institute of Science and Technology, Japan) |
| This paper proposes a technique of on-line modeling for feedforward (FF) learning control.For an unknown nonlinear MIMO plant which is free of zero dynamics, it constructs a bank of filters each of which corresponds to a local inverse model. In real time the current operating point, called scheduler, specifies a filter and accumulates there input-output (i/o) data while FF control signal is generated. In contrast to a conventional scheme using truncation, this paper proposes a new scheme with an interpolation technique for regression, thereby improving accuracy of local modeling. |
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The Identification of Dynamics of Hydraulic Servo System for Remote Cutting |
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Hyun Cheol Lee, Min Cheol Lee(Pusan National University, Republic of Korea) |
| this paper deals with remote control of single hydraulic servo system. Identification of dynamics of single rod hydraulic servo system has done for control of position control of hydraulic cylinder. The unknown parameters could be estimated by using signal compression method. After estimating unknown parameters, the response of the identified model from simulation is compared with the response from the real system. The estimated parameter of this paper will be used in control of multi-channel hydraulic servo system with sliding mode control with sliding perturbation observer(SMCSPO). |
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Disturbance Attenuation Fictitious Reference Iterative Tuning in Frequency Domain |
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Shiro Masuda, Yuki Gohda(Tokyo Metropolitan University, Japan), Yoshihiro Matsui(Tokyo National College of Technology, Japan) |
| The paper gives a design method for a Fictitious Reference Iterative Tuning (FRIT) method for disturbance attenuation which can be designed using the frequency domain approach. The frequency domain performance index for the FRIT method consists of the Fourier transformation of one-shot experimental input-output data and disturbance signal. The paper shows that the optimal pre-filter, which well approximates the performance index to the original performance index, can be easily calculated in the frequency domain. |
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Least Squares Approach to Fictitious Reference Based Tuning of Full Parameterized Linear Time-Invariant Controllers |
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Osamu Kaneko(Kanazawa University, Japan) |
| In this paper, a parameter tuning method of full-parameterized linear time-invariant controllers is presented.Our approach is based on the direct use of the experimental data without mathematical models.
Concerned with this point, the author and his colleagues have proposed a so-called ``fictitious reference iterative tuning" method (FRIT) where full-parameterized controller is tuned in the off-line nonlinear optimization with only one-shot experimental data.This paper expands the previous method to be performed in the off-line least squares.
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Tremor Suppression Robust Hybrid Control for Handheld Micromanipulator |
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Sungwan Boksuwan(The University of Elector-Communications, Japan), Taworn Benjanarasuth(King Mongkut’s Institute of Technology Ladkrabang, Thailand), Chisato Kanamori, Hisayuki Aoyama(The University of Elector-Communications, Japan) |
| Tremor Suppression for Handheld Micromanipulator using Robust Hybrid Control
Sungwan Boksuwan, Taworn Benjanarasuth, Chisato Kanamori and Hisayuki Aoyama
This paper proposes a suppression of tremor effects, fluctuations caused by a user’s hand, on a handheld
micromanipulator by means of a robust hybrid control scheme. The proposed control scheme is a combination between an explicit model predictive control and a PID controller. The control objective is to achieve robust tracking performance, to dampen the vibration of the mechanism and to suppress a disturbance, a tremor.
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