巻号一覧
5 巻 (1969)
- 5 号 p. 401-
- 4 号 p. 295-
- 3 号 p. 201-
- 2 号 p. 103-
- 1 号 p. 1-
5 巻, 2 号
選択された号の論文の13件中1～13を表示しています
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餌取 寛次1969 年 5 巻 2 号 p. 103-110
発行日: 1969/06/30
公開日: 2009/03/27
ジャーナル フリーTransient behavior of thermoelectric cooling with a semiconductor thermocouple is studied experimentally and compared with the theoretical calculations, taking into account the initial temperature distributions in the thermocouple elements and the effect of heat exchange with the sorrounding atmosphere at the surface.
In the present work, theoretical analyses and numerical calculations of the response of Peltier cooling at the cold junction are made on the assumption that a factor of heat exchange with th surrounding media including the atmosphere depends on the ratio of the heat transfer coefficient of the surface to the thermal conductivity of the elements under various conditions concerning the above factor and the DC current pulse applied. The above analyses are, except for the temperature near dew-point, in fairly good agreement with the experimental facts of thermoelectric cooling with (Sb2Te3-Bi2 Te3)-(Bi2Te3-Bi2Se3) compound semiconductors in atmosphere.抄録全体を表示PDF形式でダウンロード (1056K) -
青木 洋一, 須賀 一郎1969 年 5 巻 2 号 p. 111-117
発行日: 1969/06/30
公開日: 2009/03/27
ジャーナル フリーThis paper deals with a certain optimal control problem of linear time-invariant systems whose outputs are described by the form of convolution integral of impulse responses and inputs.
The problem dealt here is to determine such inputs that the integral of the quadratic form of input variables is minimized and output variables are settled to certain desired values in a specified time duration.
The authors propose a new effective method to solve this kind of problems and consider 1-input and 1-output systems in the first half of the paper and m-input and m-output systems in the latter half.
Considering the fact that the impulse response of a system is not necessarily given in an analytic form but is described by a set of discrete data, the authors formulate this optimal control problem without using derivatives of the impulse response.
Accordingly, if a set of discrete values of the impulse response is given, the optimal input is determined only by numerical integration and algebraic computation.
Some examples computed by a digital computer are also presented.抄録全体を表示PDF形式でダウンロード (840K) -
中村 嘉平, 岩貞 継夫, 足立 千秋1969 年 5 巻 2 号 p. 118-126
発行日: 1969/06/30
公開日: 2009/03/27
ジャーナル フリーThis paper presents a new method of plant identification with correlation technique supplying a test signal which is first proposed by Huffman and named I-sequence by the authors. This sequence is a non-periodic finite length pulse train whose autocorrelation function is much similar to that of white noise. Impulse response of the plant is obtained by making the crosscorrelation function between the measured output and the test signal of I-sequence.
Of the conventional identification method with correlation technique, the M-sequence method is most well-known, while the I-sequence method has the following features for adaptive control comparing to M-sequence method.
(a) The I-sequence method makes it possible to determine a part (not the whole) of impulse response, corresponding to the length of I-sequence. Therefore, the time required to perform identification is shorter and the number of data to be handled is much smaller in general.
(b) M-sequence method requires to know a priori the effective length of impulse response. On the other hand I-sequence one is available even when the effective length is quite unknown.
Comparison between I-sequence and M-sequence methods is wholy discussed and is partly shown by the table. The accuracy of I-sequence identification increases by the suitable selection of the pulse width, the number of pulses and the total energy of pulses of I-sequence. As for the identification error, the following two cases are discussed. One is the case when a noisy disturbance is forced to supply at plant input, the other is when identification is performed repeatedly.
At last, the above mentioned features of I-sequence method are demonstrated by showing the experimental results of simulation by the analogue computer.抄録全体を表示PDF形式でダウンロード (990K) -
樋口 清伯, 田村 進一, 田中 幸吉1969 年 5 巻 2 号 p. 127-133
発行日: 1969/06/30
公開日: 2009/03/27
ジャーナル フリーA non-supervised adaptive identification of unknown waveforms in the noisy environments is described in this paper. Adaptive correlating filter is proposed, which is constructed by means of linear combinations of orthogonal function filters. Its operation and statistical properties are stated in detail.
The output waveform of this filter represents the crosscorrelation function between the unknown waveform imbedded in noise and the impulse response waveform of this filter composed of linear combinations. By this result, this filter operates as follows. At the instant of the maximum value of cross-correlation function crossed over the threthold level, the combination weights are changed in accordance with the weighted average method so as to grow the filter output. If the above average process is repeated, it is numerically derived at large SN-ratio that the impulse response of this filter converges to the unknown waveform.
Finally the results obtained numerically and experimentally are discussed.抄録全体を表示PDF形式でダウンロード (918K) -
砂原 善文, 大住 晃1969 年 5 巻 2 号 p. 134-141
発行日: 1969/06/30
公開日: 2009/03/27
ジャーナル フリーThe purpose of this paper is to establish an optimal control of nonlinear dynamical systems with state-independent noise under noisy observations.
Guided by the state-space representation concept, we describe approximately mathematical models for both the dynamical systems and the observation process by the nonlinear vector stochastic differential equation of Itô-type.
First, for the purpose of establishing an approximate approach to solve state estimation problems of nonlinear stochastic systems in Markovian framework, a method of stochastic linearization is introduced which will hopefully be of an extensive use to the optimal control version.
Secondly, by using the estimator dynamics obtained, an approximation to the optimal control is presented with respect to a quadratic cost functional.
Finally, detailed discussions are given by a numerical example including quantitative aspects of sample paths behavior of optimal control signal and state estimation.抄録全体を表示PDF形式でダウンロード (966K) -
小林 彬, 内藤 正1969 年 5 巻 2 号 p. 142-149
発行日: 1969/06/30
公開日: 2009/03/27
ジャーナル フリーIn the velocity measurement using spatial filter, the parallel-slit forms a kind of narrow-band-pass spatial filter, and its selectivity is defined by the ratio of center frequency to frequency width about spatial frequency characteristics. And it is desirable that the selectivity is as large as possible.
In this paper, from the above point of view, the problem of the narrow-band-pass optimal spatial filter is considered.
The optimal problem is to maximize the selectiviy for the fixed slit-number N, with which the frequency width is defined like a standard deviation of frequency characteristics.
It is shown that this problem is equivalent to minimizing the quadratic from about a certain matrix A, and its solution is the eigen vector corresponding to the minimum eigen value of matrix A.
Besides, the change of the selectivity is discussed when the random error exists in realizing the weighting function as a spatial filter.抄録全体を表示PDF形式でダウンロード (821K) -
高井 宏幸, 石田 明允1969 年 5 巻 2 号 p. 150-158
発行日: 1969/06/30
公開日: 2009/03/27
ジャーナル フリーNamerically-controlled positioning system has been increasing in popularity and is applied to simpler and cheaper machines lately.
Then there is a demand for the simpler and cheaper NC positioning system, so the authors tried to make such a system.
The authors employed for each axis the measuring system which consists of a 5-phase synchro and two digital potentiometers instead of the multi-speed synchro system and the drive unit which consists of a induction motor and two electromagnetic disc clutches.
The 5-phase synchro has five stator windings and has the advantage of its D-A conversion being simple, in comparison with usual synchro.
This paper presents analysis of the operation of the 5-phase synchro and the static error caused by the command voltage transformer.
The output torque of the electromagnetic disc clutch can be controlled continuously by controlling the clutch current. Characteristics and heating energy losses of the clutch in such a situation is examined.
The specification of this system is following. Minimum setting unit 0.01mm, Maximum length of travel 999.99mm, Maximum speed 3m/min.抄録全体を表示PDF形式でダウンロード (2067K) -
原田 正一, 井上 政昭, 山村 秀夫, 神山 守人1969 年 5 巻 2 号 p. 159-166
発行日: 1969/06/30
公開日: 2009/03/27
ジャーナル フリーA fluidic respirator with on moving parts has several merits as follows.
1) The pressure of the oscillation at trachea are invariable when the compliance of lung varied.
2) The ratio of durations exhalation to inhalation is kept constant when the gas pressure and the compliance of lung are varied, so the inspirated gas volume is determined solely by the gas pressure supplied.
3) The voluntary breathings are not obstructed by the respirator.
4) No power sources are necessary, except gas sources O2 and N2O.
5) The weight is light and easy to deal with.
In addition, the effects of a lenitive for the tension of muscles can be observed by the change of frequency, because the frequency is changed by the compliance of lung. The demerit is to lose more than a half of gases supplied directly into the room air.
An asymmetric pattern of bistable device is chosen by the model lung experiments with reference to the matching of the minimum pressure in oscillation. By assuming a linearized relation of output pressure and flow in a fluidic device, a theoretical equation in the duration of inhalation is obtained. The relation between prssure and flow during exhalation is obtained by Bernoulli's equation referring to negative pressure made by the effect of jet entrainment. As the results, the frequency is proportional to A0/C√Ps, and the time ratio of exhalation to inhalation is proportional to l/√A0. These are obtained theoretically, where A0: cross sectional area of output chunnel in a fluidic device, C: compliance of lung, Ps: gas supply pressure to the respirator. Experimental results of the basic tests on model lung and the clinical tests are demonstrated, and the theoretical evaluations are made valid.抄録全体を表示PDF形式でダウンロード (1367K) -
野村 典正1969 年 5 巻 2 号 p. 167-176
発行日: 1969/06/30
公開日: 2009/03/27
ジャーナル フリーIn this paper, detailed analyses are made concerning a controllable region in the third order linear control systems by applying the author's method which uses a certain vector-valued function Z(t, η).
It is shown that a boundary point of the controllable region can be obtained rigorously in some limited cases, and approximately on the basis of a numerical computation in the other cases.
By taking into account the fact that a boundary point in the state space is determined as a function of the parameters introduced instead of the initial values of the system's adjoint differential equation, a boundary surface of the controllable region is obtained as an image of the plane formed by the parameters in the state space.
Furthermore, discussions are also made concerning the n-th order linear control systems, and it is clarified that a boundary of the controllable region can be obtained in the same manner as shown in the third order linear control systems.抄録全体を表示PDF形式でダウンロード (1491K) -
川島 美勝, 増淵 正美1969 年 5 巻 2 号 p. 177-183
発行日: 1969/06/30
公開日: 2009/03/27
ジャーナル フリーThis paper presents the dynamic behavior of the dehumidification process which has heat and mass transfer resistances on both gas and liquid sides.
Simplified two lumped systems which assume a gas bulk and a liquid bulk are considered. The double film theory to the distributions of concentration and temperature near the interface is used. Basic differential equations are obtained from the heat- and mass-balance relations. The equations are linearized and non-dimensionalized near the steady state and the block diagram and the transfer matrix are obtaind. A numerical example is also shown.
The result shows that there exists an interaction of heat and mass transfer, which depends on the temperature sensitivity of the gas-liquid equilibrium relationship, latent heat of evaporation of water and heat of dilution. The second result is that the over-all mass transfer coefficient is not constant and is shown as a function of transfer frequency when the input temperature of gas and liquid are constant and the humidity of the inlet gas and the concentration of the inlet liquid are variable.抄録全体を表示PDF形式でダウンロード (761K) -
佐藤 敬, 原 修, 市川 惇信1969 年 5 巻 2 号 p. 184-191
発行日: 1969/06/30
公開日: 2009/03/27
ジャーナル フリーBefore starting the design of a multilevel control system, it is necessary to investigate whether or not the decentralized control will really reduce the computing cost of large scale system optimization. In this paper it is examined, through a case study of a linear dynamic system with a quadratic performance index, when a two-level control system is effective with respect to the computer time.
The two-level control algorithm employed here is the successive substitution method of interaction variables. Empirical equations for the computer time are shown and the “maximum allowable iteration number” for an effective two-level control is defined.
As a result, it is pointed out that the two-level control algorithm for the linear quadratic problem considered here is not effective and also that the multilivel control may be effective if the local-optimization cost function will increase much slower than the overall-optimization one. And a new first level algorithm is proposed which meets such a computing cost qualification.抄録全体を表示PDF形式でダウンロード (1048K) -
穂坂 直弘1969 年 5 巻 2 号 p. 192-197
発行日: 1969/06/30
公開日: 2009/03/27
ジャーナル フリーIf the detecting element of a radiation pyrometer is exposed in the air, its output varies merkedly with the wind velocity. Some behavior of an anemometer designed on the base of this fact is reported. When a couple of pieces of metal foil having different total thermal emissivity is placed parallel to the air stream and is heated by radiation of constant radiant flux, the relation of the inverse of temperature difference between the pieces at steady state (θ-1) to the square root of velocity of the stream (u1/2) is expected to be linear.
The result, which supports this assumption is obtained on the measurement for the wind velocity between 20cm/s and 5m/s. Experiment is performed on the pair of the pieces of platinum foil (3mm×4mm×0.005mm) as the detecting element, which was suspended with tellurium-bismuth thermocouples in a small wind tunnel made of glass tube of 25mm in diameter and is heated by constant radiation.
The result of the experiment for the slower stream shows that the relation of the logarithm of temperature difference between the metal foils (logθ) to the velocity of the air stream (u) is linear. Representing the temperature difference when the velocity is zero by θs, the value of logθs is in good agreement with the extrapolated value of the straight line indicating this linear relation, which is expressed as logθs-logθ=u/τu. τu is a constant concerning the sensitivity having the value of 28cm/s in this work, but θs varies with radiant flux density on the detector foils. The value of θs can be used conveniently as the measure of adjustment of flux density.抄録全体を表示PDF形式でダウンロード (867K) -
小宮 勤一, 長塩 圭一1969 年 5 巻 2 号 p. 198-199
発行日: 1969/06/30
公開日: 2009/03/27
ジャーナル フリーPDF形式でダウンロード (675K)
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