US3880348A
Expired / Lapsed
US
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Variable structure adaptive controller
Assignee: ENERGOINVEST ISTRAZIVACKO RAZV
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Filing: 1974-06-03
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Granted: 1975-04-29
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Expires: 1994-06-03
Abstract
Abstract A variable structure adaptive controller is provided. It includes a basic circuit for the preparation of information and an adaptation circuit which is coupled to the basic circuit and provides for the adaptation of multiplication coefficients as a function of the derivation value between the values of an error signal and the differential of this error signal. The circuits provide for a very wide range of changes in parameters and for compensating the variations of these parameters. The basic circuit includes an input terminal with a multiplier-divider circuit coupled to the same, there being a circuit providing the function TP/ Tau P+1 and two output terminals one of which is connected directly and the other through the latter said circuit to the input terminal. A further output terminal is connected to the multiplier-divider circuit. The adaptation circuit includes two parallel circuits connected respectively to the two aforementioned output terminals and a dividing circuit connecting these two parallel circuits to the multiplying divider circuit.
Inventors
- 👤 Adnan Salihbegovic
- 👤 Bozidar Matic
- 👤 Svetozar Zimonjic
- 👤 Faruk Hadziomerovic
- 👤 Alexandr Michailovic Shubladze
- 👤 Alexei Pavlovic Okunev
- 👤 Stanislav Vasilyevi Yemeljanov
- 👤 Nataly Yevgenyevna Kostyleva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:24
CPC Classifications
G; G05; G05B; G05B13/00; G05B13/02; G05B13/0205; G05B13/024; G05B13/0245
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
99 words
A variable structure adaptive controller for compensating variations of gain and/or time constant parameters of an apparatus or process to be controlled, said controller comprising basic circuit means for the preparation of error information and an error signal and an adaptation circuit means which is coupled to said basic circuit means and provides for the adaptation of multiplication coefficients as a function of the derivation values of the error signal and of the differential of said error signal, said circuit means providing for, in a very wide range of changes in said parameters, compensating the variations of said parameters.
Claim 2
Dependent Claim
99 words
A variable structure adaptive controller for compensating variations of gain and/or time constant parameters of an apparatus or process to be controlled, said controller comprising basic circuit means for the preparation of error information and an error signal and an adaptation circuit means which is coupled to said basic circuit means and provides for the adaptation of multiplication coefficients as a function of the derivation values of the error signal and of the differential of said error signal, said circuit means providing for, in a very wide range of changes in said parameters, compensating the variations of said parameters.
Claim 3
Dependent Claim
62 words
A controller as claimed in claim 1 wherein said basic circuit means includes an input terminal, multiplication means coupled to said input terminal, further means providing a function of TP/ Tau P+1, two output terminals, one of which is connected directly and the other through said further means to said input terminal, and a further output terminal connected to said multiplication means.
Claim 4
Dependent Claim
33 words
A controller as claimed in claim 2 wherein said adaptation circuit means includes two parallel circuits connected respectively to said two output terminals and dividing means connecting said circuits to said multiplying means.
Claim 5
Dependent Claim
47 words
A controller as claimed in claim 1 wherein said adaptation circuit means comprises first means coupled to said basic circuit means to determine an error signal epsilon from a standard set signal xz and a variable signal x generated by the apparatus or process to be controlled.
Claim 6
Dependent Claim
32 words
A controller as claimed in claim 4 wherein said adaptation circuit means comprises differentiation means coupled to said first means for generatiNg a signal x representing a derivative of said variable signal.
Claim 7
Dependent Claim
44 words
A controller as claimed in claim 5 wherein said adaptation circuit means comprises absolute value circuit means coupled to said first and differentiation means to generate signals epsilon and x representing absolute values of said error signal and the derivative of said variable signal.
Claim 8
Dependent Claim
51 words
A controller as claimed in claim 6 wherein said adaptation circuit means comprises memorizing circuit means coupled to said first and differentiation means to memorize the signals generated by the latter, said memorizing circuit means including means to memorize maximum values x and epsilon of signals received from said differentiation means.
Claim 9
Dependent Claim
32 words
A controller as claimed in claim 6 wherein the memorizing circuit means further includes means to establish a time constant for the memorizing circuit means during which said maximum values are memorized.
Claim 10
Dependent Claim
58 words
A controller as claimed in claim 8 wherein said adaptation circuit means comprises multiplier-divider means coupled to said memorizing circuit means to operate on the maximum value signals, said multiplier-divider means including a pulse width modulator coupled by said absolute value circuit means to said differentiation means and generating a signal representing a denominator of an adaptation coefficient.
Claim 11
Dependent Claim
31 words
A controller as claimed in claim 9 wherein the multiplier-divider means includes an amplitude limiter coupled to said pulse width modulator to generate a signal representing the numerator of said coefficient.
Claim 12
Dependent Claim
28 words
A controller as claimed in claim 10 wherein said adaptation circuit means comprises a switch coupled to the amplitude limiter to control the polarity of the output thereof.
Claim 13
Dependent Claim
81 words
A controller as claimed in claim 10 wherein the multiplier-divider means is an amplifier-transistor circuit producing a train of pulses having a mean value proportional to ( epsilon + Alpha / sx + Beta ) ( epsilon + Td sx) wherein s is a complex Laplace operator Td is the time constant of said differentiation means, and Alpha and Beta are coefficients to correct operation of said multiplier-divider means, said multiplier-divider means including potentiometers producing voltages representing Alpha and Beta .
Claim 14
Dependent Claim
50 words
A controller as claimed in claim 12 comprising a function generator means coupled to and receiving the output from said multiplier-divider means and producing an output proportional to z about k ( epsilon + Alpha / sx + Beta )(1 + (Td/Ti)) epsilon + Td s epsilon +( epsilon /Tis).
Claim 15
Dependent Claim
49 words
A controller as claimed in claim 12 comprising a function generator means coupled to and receiving the output from said multiplier-divider means and producing an output proportional to z about k ( sx + Beta / epsilon + Alpha )(1 + Td/Ti) epsilon + Tds epsilon +( epsilon /Tis).
Claim 16
Dependent Claim
17 words
A controller as claimed in claim 13 wherein the function generator means includes a low pass filter.
Claim 17
Dependent Claim
27 words
A controller as claimed in claim 15 comprising limiter means coupled to the function generator means to establish maximum and minimum values of the output signal thereof.
Claim 18
Dependent Claim
38 words
A controller as claimed in claim 16 wherein the function generator means includes an amplifier-transistor circuit producing an output proportional to G(s) K1 ( epsilon + Alpha / sx + Beta )(1 + (Td/Ti) + Tds + (1/Tis)).
Claim 19
Dependent Claim
39 words
A controller as claimed in claim 16 wherein the function generator means includes an amplifier-transistor circuit producing an output proportional to G(s) k1 ( sx + Beta / epsilon + Alpha )(1 + (Td/Ti) + Tds + 1/Tis) .
References Cited (Backward Citations)
US3701889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |