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IRE Transactions on Automatic Control

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  • 1. Complex-curve fitting

    Publication Year: 1959, Page(s):37 - 43
    Cited by:  Papers (216)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4872 KB)

    The mathematical analysis of linear dynamic systems, based on experimental test results, often requires that the frequency response of the system be fitted by an algebraic expression. The form in which this expression is usually desired is that of a ratio of two frequency-dependent polynomials. In this paper, a method of evaluation of the polynomial coefficients is presented. It is based on the mi... View full abstract»

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  • 2. On the general theory of control systems

    Publication Year: 1959, Page(s): 110
    Cited by:  Papers (141)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (30 KB)

    This paper deals with further advances of the author's recent work on optimal design of control systems and Wiener filters. Specifically, we consider the problem of designing a system to control a plant when (1) not all state variables are measurable, (2) the measured state variables are contaminated with noise, and (3) there are random disturbances. An explicit design procedure (well adapted to d... View full abstract»

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  • 3. Control system analysis and design via the second method of lyapunov: (I) continuous-time systems (II) discrete time systems

    Publication Year: 1959, Page(s): 112
    Cited by:  Papers (108)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (46 KB)

    I - Continuous-Time Systems - The "second method of Lyapunov is the most general approach currently in the theory of stability of dynamic systems. After a rigorous exposition of the fundamental concepts of this theory, applications are made to (a) stability of linear stationary, linear nonstationary, and nonlinear systems; (b) estimation of transient behavior; (c) control-system optimization; (d) ... View full abstract»

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  • 4. Analog study of dead-beat posicast control

    Publication Year: 1958, Page(s):14 - 21
    Cited by:  Papers (59)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    A method is presented which eliminates the oscillations and overshoot in a lightly damped servomechanism in a time of considerably less than one cycle of the uncompensated oscillation. The frequency response of a resonant system compensated in this manner can be made flat up through and beyond the resonant frequency of the system. For dead-beat response in one-half period, the frequency response i... View full abstract»

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  • 5. Reaction wheel attitude control for space vehicles

    Publication Year: 1959, Page(s):139 - 149
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    An attitude control system consisting of motor-driven inertial wheels in conjunction with an over-riding mass ejection system is proposed for use in space vehicles. Control by mass ejection is usedto compensate for initial distrubances during separation from the booster, and for removal of unwanted momentum stored in the wheels. The use of reaction wheels permits fine, damped attitude control. A l... View full abstract»

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  • 6. On errors introduced by combined sampling and quantization

    Publication Year: 1962, Page(s):58 - 68
    Cited by:  Papers (31)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    In digital computations, errors resulting from sampling and amplitude quantization (round off) are unavoidable. This work evaluates the mean-square error caused by sampling and quantization at the output of a linear network which contains a single quantizer. A detailed answer is given to the question, "Given quantized samples of a signal which is a sample function of a random process, what is the ... View full abstract»

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  • 7. Stability conditions of pulse-width-modulated systems through the second method of Lyapunov

    Publication Year: 1961, Page(s):266 - 276
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    PWM systems contain inherent nonlinearities which arise from their modulation scheme. Thus, for a legitimate study of stability, such systems must be treated as nonlinear sampled-data systems without initially resorting to linear approximations. For a nonlinear system whose dynamic behavior is described by a set of first-order difference equations, one of the theorems in the second method of Lyapu... View full abstract»

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  • 8. Root locus properties and sensitivity relations in control systems

    Publication Year: 1960, Page(s):57 - 65
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7263 KB)

    The differential properties of root loci including pole sensitivity, angle of slope, and curvature at ordinary and irregular points are investigated in a unified manner. A relation between the sensitivity function and pole sensitivity is established. The sensitivity is shown to determine variations in the transfer function due to large (not only infinitesimal) variations in K. Additional propertie... View full abstract»

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  • 9. A general performance index for analytical design of control systems

    Publication Year: 1961, Page(s):217 - 222
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    A generally applicable performance index for linear feedback systems is proposed. This performance index enables one to specify a desired (ideal) response towards which the system is optimized. The response of any unity-numerator system can be chosen as the ideal response. The coefficients of the performance index are determined from the specified ideal response, and the procedure of optimization ... View full abstract»

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  • 10. Optimalizing control with process-dynamics identification

    Publication Year: 1962, Page(s):140 - 155
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (952 KB)

    The meaning of the terms process identification, adaptive and optimalizing control is indicated. The basic difference between these types of control and the ordinary ones is the need for a "learning process". Using multiplication plus integration as the simplest possible type of "learning", simple schemes are obtained in which sinusoidals or random fluctuations may be used as test signals. A more ... View full abstract»

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  • 11. Adaptive sampling frequency for sampled-data control systems

    Publication Year: 1962, Page(s):38 - 47
    Cited by:  Papers (48)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    Sampled-data control systems generally have fixed sampling frequencies which must be set high enough to give satisfactory performance for all anticipated conditions. A study is made here of an adaptive system which varies the sampling frequency by measuring a system parameter. It is shown that a sampler followed by a zero-order hold whose sampling period is controlled by the absolute value of the ... View full abstract»

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  • 12. Input-output analysis of multirate feedback systems

    Publication Year: 1957, Page(s):21 - 28
    Cited by:  Papers (202)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    A general analytical technique described in this paper permits the extension of Z -transform methods to sampled-data systems containing synchronized switches which do not operate with the same sampling rate. Sampling periods of each switch are first expressed in the form T/p_{1} ... T/p_{n} (where View full abstract»

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  • 13. Design of optimum beam flexural damping in a missile by application of root-locus techniques

    Publication Year: 1960, Page(s):237 - 246
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    The control of a missile in free-fall in the presence of external disturbances requires that the control system be stable when various body bending modes are excited. It is an inevitable consequence of the internal and external missile environment that all body bending modes are excited. The general method of stabilizing a missile is to choose a minimum of inertial sensors such as rate and attitud... View full abstract»

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  • 14. Topological techniques for the solution of multi-loop sampled systems

    Publication Year: 1959, Page(s): 108
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (34 KB)

    This paper presents a flow-graph approach for analyzing multiloop sampled-data systems. Two techniques for finding the sampled output are examined. These are, first, construction of a "sampled" signal flow graph from the original system; second, a general gain formula which can be directly applied to the original system. The theorems necessary to establish the formula are rigorously proved. The fi... View full abstract»

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  • 15. Synthesis of an optimal set of radar track-while-scan smoothing equations

    Publication Year: 1962, Page(s):27 - 32
    Cited by:  Papers (112)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    Performance measures are described which realistically reflect both noise-reduction and maneuver-following capability of a radar track-while-scan (TWS) system. Illustrations are given which compare various smoothing equations on the basis of this performance measure. Finally, a set of position-and-velocity tracking equations is synthesized by a calculus-of-variations technique. The synthesized set... View full abstract»

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  • 16. A general method for deriving the describing functions for a certain class of nonlinearities

    Publication Year: 1960, Page(s):135 - 141
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    Since Goldfarb's original work on describing functions, a considerable number of papers have been published in which the describing functions of particular nonlinearities have been derived. It appears however that little effort has been made to classify the nonlinearities. Since the describing function method is one of the more powerful methods available at present to analyze nonlinear feedback sy... View full abstract»

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  • 17. Foundations of control

    Publication Year: 1960, Page(s): 1
    Request permission for commercial reuse | PDF file iconPDF (246 KB)
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  • 18. Stability and graphical analysis of first-order pulse-width-modulated sampled-data regulator systems

    Publication Year: 1961, Page(s):276 - 282
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    Pulse-width-modulated sampled-data systems are described by nonlinear difference equations which do not lend themselves to an exact analytic treatment. This paper presents a graphical technique for the analysis of PWM sampled-data systems with first-order plants. This technique provides a sufficient condition for asymptotic stability in the large, a method for examining the damping properties of t... View full abstract»

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  • 19. A modified Lyapunov method for nonlinear stability analysis

    Publication Year: 1961, Page(s):199 - 210
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (984 KB)

    A modification of the original Lyapunov stability criterion is given, which includes intermediate conditions of stability, as well as "stability in the small" and "stability in the large." A means is developed for applydng it to practical control problems that eliminates much of the guesswork usually required with Lyapunov methods of investigation. The process is based upon an integration of matri... View full abstract»

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  • 20. Stability analysis of nonlinear control systems by the second method of Liapunov

    Publication Year: 1962, Page(s):3 - 15
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (976 KB)

    The second method of Liapunov is used to study asymptotic stability of feedback control systems with single non-linear elements. The paper aims at a systematic development of Liapunov functions in terms of canonic transformations of state variables. This approach yields various simplified stability criteria; a rather complete table of such criteria is included. Several insights believed novel conc... View full abstract»

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  • 21. General approach to control theory based on the methods of Lyapunov

    Publication Year: 1959, Page(s): 20
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (25 KB)

    This discussion is an introduction to the second method of Lyapunov in determining the stability of linear and nonlinear control systems. Although almost universally referred to in Russia and although it is becoming an increasingly important concept, this method has not been used in English-speaking countries because of the lack of suitable translations. This introduction to the method will not be... View full abstract»

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  • 22. A parameter tracking servo for adaptive control systems

    Publication Year: 1959, Page(s):100 - 111
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    This paper describes one very general approach to the design of adaptive control systems. The particular systems considered are process adaptive. The dynamic characteristics of the physical process are determined by the parameter tracking servo. The parameters thus determined are used to program the process' controller. The parameter tracking servo is a closed loop self-adjusting system. It consis... View full abstract»

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  • 23. On the real-time control of time-varying linear systems

    Publication Year: 1962, Page(s):3 - 10
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    A new class of sampled data controls for time-varying dynamic processes is developed and investigated. The notions of interval control, prediction and synthesis of the optimum control variable by a linear combination of orthonormal polynomials in time t are introduced and applied in the optimization of a modified least-squares integral index of performance. Minimization of the index of performance... View full abstract»

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  • 24. A minimal time discrete system

    Publication Year: 1961, Page(s):111 - 125
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1248 KB)

    Consider a sampled-data control system with the following sequence of components in the forward path: a sampler with period T , a zero-order hold circuit, a linear amplifier with saturation limits ±1, and a plant with transfer function G(s)=frac{1}{\Pi \min{i=1}\max {n} (s-\lambda _{i})}. It is assumed that the poles... View full abstract»

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  • 25. The analysis of sampled-data control systems with a periodically time-varying sampling rate

    Publication Year: 1959, Page(s):15 - 21
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6201 KB)

    The z-transform is used to solve sampled-data systems which have a periodically time-varying sampling rate, i.e., systems which have a repetitive sampling pattern in which the time duration between the individual samples is not constant. Such systems are described by linear difference equations with periodic coefficients; however, the difference equation which describes the system at sampling inst... View full abstract»

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  • 26. Time optimal control for plants with numerator dynamics

    Publication Year: 1962, Page(s):47 - 50
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (413 KB)

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  • 27. On the synthesis of feedback systems with open-loop constraints

    Publication Year: 1959, Page(s):31 - 37
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4894 KB)

    A method is presented for synthesizing a feedback system under the constraints that the open-loop transfer function must have specified Kv and contain real poles at prescribed locations. The method is based on examination of the inverse root-locus plot for the closed-loop poles and zeros. Algebraic equations are obtained for the open-loop pole and zero locations. Examples are given for ... View full abstract»

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  • 28. An analytical approach to root loci

    Publication Year: 1961, Page(s):326 - 332
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    The general algebraic equations of root loci for real K are found in polar and Cartesian coordinates. A synthesis method is then suggested which leads to linear equations in the coefficients of the open-loop transfer function when closed-loop poles and their corresponding gains are specified. Equations are also found for the gain corresponding to a given point... View full abstract»

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  • 29. Direct cycle nuclear power plant stability analysis

    Publication Year: 1961, Page(s):237 - 244
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    A power plant with a heat exchanger such as a nuclear reactor substituted for the conventional chemical interburn-ers in a jet engine will cause a considerable change in dynamic performance. The instantaneous power generated by the heat source is not the same as the instantaneous power delivered to the turbine. The basic control problems are analyzed using fixed control parameters and partial deri... View full abstract»

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  • 30. Variable frequency sampling

    Publication Year: 1962, Page(s): 126
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB)

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  • 31. A self-adjusting control system with large initial error

    Publication Year: 1962, Page(s):33 - 38
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    A performance measuring, plant-adaptive control system is described. A linear plant having two variable parameters induces a large system error which is reduced by adjustments made in two controller parameters. An adaptive computer, the logical design of which is based on a modification of Newton's method of descent, generates the controller-parameter changes from measurements of the integral-of-e... View full abstract»

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  • 32. Predictor-relay servos with random inputs

    Publication Year: 1959, Page(s):232 - 245
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    Part I contains an evaluation of a proposal by O. J. M. Smith on the control, by Wiener prediction and a non-linear combination of input and feedback signals, of a saturating element driving a primarily inertial load. This evaluation consists of simulation tests on a high-speed analog computer with actual continuous random Gaussian inputs. Results presented include: (1) Variation of the mean squar... View full abstract»

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  • 33. Determination of periodic modes in relay servo-mechanisms employing sampled data

    Publication Year: 1960, Page(s):298 - 305
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    A difference equation approach is presented to determine the periodic modes in relay servomechanisms employing sampled data. In using the method, together with Izawa and Weaver's method, the investigator can have all the information concerning possible periodic modes of a system. This new technique is based on expressing periodic sequences in terms of orthogonal functions in the discrete sense and... View full abstract»

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  • 34. A contribution to root-locus techniques for the analysis of transient responses

    Publication Year: 1962, Page(s):69 - 73
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    A method involving root-locus techniques is developed by which one can analyze transient responses by ascertaining bounds on them. In particular, the following questions are considered: 1) Given a rational system function W(s) , can another rational M(s) (of simpler form) be constructed such that, for sufficiently large ... View full abstract»

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  • 35. Problems of nonlinearity in adaptive or self-optimizing systems

    Publication Year: 1958, Page(s): 66
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (136 KB)

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  • 36. Time-optimal control of higher-order systems

    Publication Year: 1961, Page(s):16 - 21
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4725 KB)

    Practical extension of time-optimal control to systems of higher order than three has been limited primarily by difficulties in physically representing surfaces in a phase space of these higher dimensions. A method is presented here for obtaining the forcing function as a function of the state variables without requiring use of the phase space concept. On line solution of a set of transcendental e... View full abstract»

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  • 37. A survey of control research in U.S. engineering schools

    Publication Year: 1962, Page(s):126 - 129
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  • 38. An adaptive artificial hand

    Publication Year: 1962, Page(s):3 - 10
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    A review of the basic approaches to the artificial hand design is given. The importance of new ideas in this field using progress in automatic control theory is stressed. The most importemt feature of the new hand is the two level control. The movements of the hand can be controlled by signals produced by man as well as by external stimuli. For this purpose simple pressure sensitive transducers ar... View full abstract»

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  • 39. Extension of phase plane analysis to quantized systems

    Publication Year: 1959, Page(s):43 - 54
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (712 KB)

    The increasing applications of numerical control of processes have created a need for new methods of synthesis of control equipment. The method presented is applicable to systems commanded by discretely valued inputs, and processes whose outputs may be similarly quantized. Periodic sampling is not required. The most suitable sampling is by transmission of only significant data, as the new value ob... View full abstract»

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  • 40. A note on third-order linear systems

    Publication Year: 1960, Page(s): 151
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  • 41. Signal stabilization of self-oscillating systems

    Publication Year: 1961, Page(s):319 - 325
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    The hunt (self-oscillations) of a physical system may often be removed by the introduction of an appropriate stabilizing signal which changes the open loop gain in a nonlinear manner. More generally, the performance of nonlinear systems in many cases may be improved by the introduction of extra signals. The theory of signal stabilization developed here extends the earlier work by Oldenburger and L... View full abstract»

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  • 42. Analytical design of linear feedback controls

    Publication Year: 1958, Page(s): 74
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB)

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  • 43. Evaluation of transient response coefficients

    Publication Year: 1961, Page(s):80 - 83
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1999 KB)

    A method is presented for evaluating the transient response coefficients of response functions having poles of any multiplicity. The calculations are effected by use of a recursion-type formula with data obtained from distance and angle measurements on the root-locus plot of the system being analyzed. View full abstract»

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  • 44. Stochastic transformations and functional equations

    Publication Year: 1962, Page(s): 120
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (136 KB)

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  • 45. Guidance theory and extremal fields

    Publication Year: 1962, Page(s):75 - 82
    Cited by:  Papers (58)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    A guidance concept employing properties of optimal flight paths is developed on the basis of Jacobi's accessory minimum problem for the second variation. The analysis is equivalent to construction of a field of extremals in the neighborhood of a predetermined extremal serving as a "nominal" trajectory. In the absence of inequality constraints on the control variables, a linear terminal control sch... View full abstract»

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  • 46. Correspondence

    Publication Year: 1960, Page(s):71 - 72
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  • 47. s -plane design of compensators for feedback systems

    Publication Year: 1961, Page(s):333 - 340
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    The poles and zeros of a compensator affect the s -plane gain and phase of the open-loop system at every point in the s -plane. These effects are studied for open-loop poles and zeros on the negative real axis, and a family of curves summarizes the results. A design technique is developed which permits compensation design to... View full abstract»

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  • 48. What constitutes a controllable system?

    Publication Year: 1962, Page(s): 76
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (89 KB)

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  • 49. Fundamental equations for the application of statistical techniques to feedback-control systems

    Publication Year: 1957, Page(s):56 - 78
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1248 KB)

    The basic equations necessary for applying statistical techniques to the design of feedback-control systems are presented. The autocorrelation function of the output is computed by a transient technique which treats the input autocorrelation function as a transient input to the system. By transforming this procedure equations are developed for relating the spectral densities of the input and outpu... View full abstract»

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  • 50. A survey of techniques for the analysis of sampled-data control systems

    Publication Year: 1957, Page(s):79 - 90
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    The present use in control systems of pulsed-data links, track-while-scan radar, digital computers, and many other intermittently operative devices has stimulated interest in the analysis of sampled-data control systems. The tremendous effort now being expended to develop the techniques for analyzing such systems has resulted in the proposal of several methods of analysis. This paper presents an u... View full abstract»

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Aims & Scope

The theory, design and application of Control Systems. It shall encompass components, and the integration of these components, as are necessary for the construction of such systems. The latest title for this publication is IEEE Transactions on Automatic Control.

 

This Transactions ceased publication in 1958. The current retitled publication is IEEE Transactions on Automatic Control.

Full Aims & Scope