Automatic Control
Online ISSN : 1883-8162
Print ISSN : 0447-7235
ISSN-L : 0447-7235
Volume 6, Issue 5
Displaying 1-8 of 8 articles from this issue
  • Shigeru MIZUNO, Atsunobu ICHIKAWA
    1959 Volume 6 Issue 5 Pages 234-240
    Published: September 25, 1959
    Released on J-STAGE: October 29, 2010
    JOURNAL FREE ACCESS
    To design rationally a chemical reactor with its associated control system, it is necessary toestimate the dynamic response of the reactor. In this paper, the dynamic response of the outputconcentration to the input concentration change for a packed bed tubular reactor has been studied.
    In case of the isothermal operation, the transfer function could be derived by solving the partialdifferential equation which describes the material balance and the rate of reaction.
    The transfer function of a packed bed has a form of G (s)=e-H (s) where H (s) is rather complicatedfunction of s, and the frequency response can be estimated by numerical calculation using thefundamental kinetic parameters for the rate of reaction.
    To simplify this tedious calculation, the authors present an approximate form of transfer functionwhich has good agreement with the special condition.
    Download PDF (492K)
  • Jun KAWASAKI
    1959 Volume 6 Issue 5 Pages 241-248
    Published: September 25, 1959
    Released on J-STAGE: October 29, 2010
    JOURNAL FREE ACCESS
    Several procedures to calculate the envelope transfer function of modulated servo systems consideringthe behaviour in frequency and time domain have been published. However, those paperstreat the transfer function only in the form of frequency response and their relations to the Laplacetransform are not investigated. Takahashi proposed the method to calculate the transfer functionof A-C servo systems considering transient response caused by arbitrary input signal and introducingspecial series expansion.
    In this paper the auther describes the general method to calculate the envelope transfer functionof the modulated servo systems which is based on the complex convolution theory and the cosniderationin subsidiary domain.Modulation and demodulation are defined as the multiplication of inputsignal and, function of time f1 (t) or f2 (t) .This method gives the envelope transrfer function inthe closed and refined form.Therefore frequency characteristics are easily derived by sabstitutingjca for s in the envelope transfer function.
    Two examples are calculated and their results are examined using slow type electronic analogcomputer.
    Download PDF (3015K)
  • Yasushi ISHII
    1959 Volume 6 Issue 5 Pages 249-258
    Published: September 25, 1959
    Released on J-STAGE: October 29, 2010
    JOURNAL FREE ACCESS
    The sampling and quantization of signals are essential to the digital devices such as digitalcomputers and A-D converters. This paper develops statistical optimum design methods of thecontrol systems containing these digital devices under random disturbances.
    In the first part, neglecting the quantization effects the pulse transfer function of a sampled-datacontrol system which minimizes the mean square error is presented as a function of the powerspectrum of reference input signal, under several constraints which come from physicalrealizability of the system, time constants and dead time of controlled process, etc. Althoughquantizing operation is nonlinear, it can be linealized as a superposition of white noise on thesignals in statistical treatments, and the corrections due to quantizing effect to the optimum designare discussed theoretically.
    The optimum pulse transfer functions has been calculated for several kinds of random inputsand these results are examined using a high speed simulator of the sampled-data system.
    Download PDF (2765K)
  • [in Japanese]
    1959 Volume 6 Issue 5 Pages 259-263
    Published: September 25, 1959
    Released on J-STAGE: October 29, 2010
    JOURNAL FREE ACCESS
    Download PDF (297K)
  • [in Japanese]
    1959 Volume 6 Issue 5 Pages 264-270
    Published: September 25, 1959
    Released on J-STAGE: October 29, 2010
    JOURNAL FREE ACCESS
    Download PDF (479K)
  • [in Japanese]
    1959 Volume 6 Issue 5 Pages 271-278
    Published: September 25, 1959
    Released on J-STAGE: October 29, 2010
    JOURNAL FREE ACCESS
    Download PDF (2338K)
  • [in Japanese]
    1959 Volume 6 Issue 5 Pages 279-282
    Published: September 25, 1959
    Released on J-STAGE: October 29, 2010
    JOURNAL FREE ACCESS
    Download PDF (1990K)
  • [in Japanese], [in Japanese]
    1959 Volume 6 Issue 5 Pages 283
    Published: September 25, 1959
    Released on J-STAGE: October 29, 2010
    JOURNAL FREE ACCESS
    Download PDF (1720K)
feedback
Top