SCIENTIFIC - AUTOMATIC REGULATION

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00809A000600231000-5
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 4
• Document Creation Date: December 22, 2016
• Document Release Date: July 18, 2011
• Sequence Number: 1000
• Publication Date: June 30, 1949
• Content Type: REPORT

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CLASSIFAMI ION CONFINNAL
CENTRAL INTELLIGENCE AkiENCY REPO
INFORMATION FROM
FOREIGN DOCUMENTS OR RADIO BROADCASTS CD NO
COUNTRY 77331t DATE OF
INFORMATION 1947
SUBJECT
HOW
PUBLISHED
WHERE
PUBLISHED
DATE
PUBLISHED
IANGUAGE
Scientific - imitomtic regulation
Bimonthly perioiicel
Moscow
Mar/Apr 1947
Russian
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I. a. C. at All U. as LUISLIL III ISISISISAA011os vas rarrauctes
11 111 SADISTS III SST mason WO AS soosvowass ruses is coo.
IMAM SI LAC OSIASIOORTISS Or TWA ISM .5 ISISUITTS.
SOURCE
DATE DIST. 30 Jun 1949
NO. OF PAGES ie
SUPPLEMENT TO
REPORT NO.
THIS IS UNEVALUATED INFORMATION
Avtomatita I Telemekhanika, Vol VIII, No 2, 1947.
COUNCIL APPROVES 2 FOR DEGREES
In the Scientific Council of the Institute of Automatics
and Telemechanics, Academy of Sciences USSR
. At the meeting of the Scientific Council of the Institute of Automatics
and Telemechanice, Academy of Sciences USSR, on 20 Deoember 1945, a defense
was conducted of a dissertation presented y M. A. Ayzerman, a co-worker of
the Institute, in fulfillment of requirements for the academic degree of
Doctor of Technical Sciences. The subject of the dissertation was: "The
Criteria tf Conv_rgenoo of Processes of Automatic Pegulation, Taking Into
Azcount the Nonlinearity of the Characteristics of the Elem.nts ox the
Apparee."
The candidate examined the conditions under which the procees of auto-
matic regulation was convergent not only "for small (deviations)," but also
"for largo (deviations)," after the given initial deviations. Successire
applioation of the criteria of Bendivon and the second method of Iyapunov
permitted the determination of conditions, which the nonlinear differential
equations deocribing the process of rngulstion suet Wier; !II order that ;-No
protesa might converge toward a positzcn of eqLflibrium stabilized by the regu-
lator after the given deviations.
It developed that for the convergence of the processes "for Large(devi-
ation)," it was sufficient to require that the nonlinear characteristics of
the separate elements of the apparatus not go beyond the limits of the regions
which can be set up for any system of equations by a uniform mati:od. The fact
of the convergence of the process is not dependent upon how the characteristics
proceed inside these regions.
The developed methods are set forth in the dissertation for the analysis
of classic types of regulators: direct action, indirect action with inflexible
feedback connection, isodrome (isochronistic?) regulators, and stabilizers
with additional reaction on the basis of the first derivative.
CLASSIFICATION
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Regions are .constructed, for nil. typos af..regulators, in which .the
o4arecteristics of the elemopts'L,f the siporhs should proceed without
disturbing the.conditions of col,vcrgenoc of f.ho oynt-m after the given
deviations. series- of exaTtplcs of a sirallar type vac solved numaricallY,
applicable to concreto installotins of specd regulation of high-speed Diesel
motors.
In conclusion the candidate formulated six new mathematical problems,
the solution of which would guarantee the further perfection of methods de-
veloped In the dissertation.
The official opponents N. G. Chotayev, Corresponding Member, Academy of
Sciences USSR, Professor K. F. Teodorchlk, Doctor of Physicomathematioal
Sciences, and Professor G. G. Kalish gave the work a plus grade.
Chetayev noted, es the basic attainment of the work, the successive
application of strict classical methods of Iyapunov and the ideas pointed
out by LyapunovAn a demonstration of one of his theorems for the solution
of concrete technical problems of automatic regulation. Chetayez,emphastzed,
as essential attainnients, that the developed method permits taking,into account
,
the nonlinearity of the characteristics fixed graphically.
Teodorchik emphasized the meaning of the work for he techniques and
physics of oscillations, and noted the possibility of extending the results
to certain new problems not mentioned in the dissertation.
Academician A. A. Andronov, Doctor of Technical Sciences, Professor
T. K. Popov, and N. N. Naetenko, Z. Ya. Beyrakh, M. V. Meyerov, et al,
CancLdates of Technical Sciences, took part In the discussion.
Andronov remarked that the dissertation of Ayzerman does not essentially
contain any new mathmatical oonclusionn, but contains conclusions necessary
for the theory of regulation. Namely, in Ayzerman'e dissertation, for a
series of practical and importnnt casee there is first of all given a basis
of validity satisfying the procedure for linearity of the equation of motion
which lies at the base of the majority of contemporary works. .
Elucidating thia assertion, Andronov emphasized that over 90 percent of
all contemporary works on the theory of regulation are dtioted to linearized
problems. Among these, on the sttength of Lyapunov's theorem, the criteria
of Routh-Hurvitz, written for such linearized preblems, permit us to speak--
in relation to the original nonlinear problems--only of the convergence of the
regulating process with sufficiently small deviationn, which obviously does
not by itself establish a procedure. The problem, linked with the basis of
linear methods and the explanation of why "stability for small (deviations)"
often corresponds in practice to adequate "stability for Large (deviations),"
was set up long ago. An essential step in the solution of this problem was
made by Ayzermsu.
Professor A. I. Iurae, Doctor of Technical Soler:acts, also read a paper
at the meting of the Sclentifi,: Council in which he gave a brief evaluation
of the work of the candidate.
By a sesret vote, the Scientific Council of the Institute unanimously
decided to petition for the award of a university degree of Doctor of Techni-
cal Sciences to Ayzerman.
At the same assembly of the Council, Engineer M. Rozenblat cooiucted
a de:ense of his dissertation on the subject "Magnstic Amplifiers," presented
in fulfillment of requiremeets for the university degree of Candidate of
Teahnical Sciences.
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In the lant i,, veers. ,net;c. amplifinrs lave received a wide appli-
cation in nameroue prnet. -pera-e; rec.-illation, and control:
During ts time, the beeic proble-is of !:leozy end design of magnetic ampll-
fiers were deVeloped to nn lieriequete :iegree.
In the first chapter of the d:ssertetien, the basic properties and
charac'eristtcs of ferromagnetic snterials under simultaneous magnetization
in co sent and variable magnetic fields are discussed. The obtained theo-
retical and experimental data is ueed for the analysis of various designs of
magnetic amplifiers, and in the development of methods for designing certain
types of amplifiees.
In the second and third chapters, the basic types of magnetic amplifiers
and amplifiers with feedback are diecussed. Conditions are determined for
..maximum output and maximum eeneitivIty of varioue types of amplifiers. The
..:.:ependee.ce:".)f the characteristics of varioue magnetic amplifiers on the change
of voltage and frequency of the supply source, the temperature of the surround-
ing area, the degree of initial magnetizrtien, and other factors, are 'estab-
lished. Results are drawn from experimental renearrh on the most interesting
types of magnetic amplifiers.
The fourth chapter of the :work represents a specific interest. Ilere,
evidently for the first time, the basic factors defining the temporary ,
characteristics of Magnetic amplifiers are made apparent. The theoretical
ant:Vele and experimental research, conducted by the author show that:
1. The lag in a magnetic amplifier is determined chiefly by the para-
meters of the control circuit.
2. In ordinary designs using magnetic amplifier with two-sided control,
the dependence of the total change of the constant component of the magnetic
currents in all the cores of the amplifier on the value of the signal current
is close to the linear. As a consequence of this, the process of increasing
the currents in the control circuits of such magnetic amplifiers oan be con-
sidered as occurring according to exponential law.
3. The time conctant of the cumulative magnetic amplifiers is equal to
the sum of the time conetantn of the separate control circuits.
4. The relati.on of the time constants to the coefficient of amplifi-
cation is a constant value for similar magnetic amplifiers, distinguished only
by the parameters of the control circuits.
5. The inclusion of feed3>ack dir'nishes the rol.Ation of the time oonstant
to the ?coefficient of amplification.
no fifth chapter contains the author's proposed methode of designing
various types of magnetic power amplIfiers, and the exorimeatal verification
of the design types.
The official opponent, Professor V. n. Mil'ehteyn, Doctor of Telanical
Solencee, remarked "The work of Cosisle Roumblat appears to be, so fhi as
we know, the first work in which all known types of magnetic amplifiers are
examined, the first work the acquaintance with Which gives an adequately com-
plete presentation of the diversity of t'se Layouts of magnetic amplifiers, of
the relative merits of the designs and construction, and creates for the realer
a sufficiently vide scope for the intelligent selection of a magnetic ampli-
fier most suitable for use in any concrete case."
Docent A. A. Feldbaum, Candidate of Technical Sciences, in his capacity
as an official opponent, pointed out "The proposed methods of design appear
to be completely practicable for engineering purposes. Therefore, they,
together with the rIch experimental data collected In the present work, de-
serve vide distribution among engineers. lortog 'o do with design construction
and *.esearch of magnetic amplifiers."
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ItAtNoting the significant merits and Practical value of the dissertation
"Magnetic Amplifiers," the offinl opponont3 expressed the desire to direct
farther eerie in the field of theory end deeign of magnetic dmpliflers4
By :.e. Secret vote, the Scientific Council unanimously decided to award
Rozonblat the university degree of Candidate of Technical Sciences.
The :Ude ideas of the developed methods are set forth 211 articles by
the candidates in the periodical, "News of the Academy of Sciences, Depart-
ment of Technical Sciences" 12 (194I), and in the periodical "Automatics
and Telehochaoice" 2 - 3 (1946), 1 (1947).
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