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2020
In the previous chapters, the basic theory has been laid down of dynamic systems and a few applications and benefits of using negative feedback have been shown. Although for simple academic examples we can always get nicely formed solutions, many questions remain unanswered. For example, how do we arrive at these mathematical models in the first place?
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In the previous chapters, the basic theory has been laid down of dynamic systems and a few applications and benefits of using negative feedback have been shown. Although for simple academic examples we can always get nicely formed solutions, many questions remain unanswered. For example, how do we arrive at these mathematical models in the first place?
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Frequency response methods for nuclear station boiler control
Automatica, 1976In recent years frequency response methods have been extended to the multi-input multi-output case and control system design techniques developed. In this paper a design approach based on a combination of two of the methods, the Inverse Nyquist Array method and the Characteristic Locus method, is applied to the design of the control scheme for the once-
F. M. Hughes, A. Mallouppa
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Time-frequency methods for analyzing structural response data
2000 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.00CH37100), 2002This paper considers the application of various time-frequency methods to structural response data. It illustrates that by use of time-frequency methods information that is not evident in impulse or frequency responses data is brought to light. The shortcomings of classical bilinear time-frequency representations are discussed.
P. R. White, D. M. Lopes
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2002
The intrinsic speed of myocardial shortening, an important biological variable, is known to be different between species and chambers and to be subject of alteration due to metabolic/hormonal status and hemodynamic conditions. Usually, speed of contraction is measured during twitches of cardiac muscle opposed to different afterloads.
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The intrinsic speed of myocardial shortening, an important biological variable, is known to be different between species and chambers and to be subject of alteration due to metabolic/hormonal status and hemodynamic conditions. Usually, speed of contraction is measured during twitches of cardiac muscle opposed to different afterloads.
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Electroencephalography and Clinical Neurophysiology/Evoked Potentials Section, 1986
Two prominent frequency components designated f1 and f2 have been identified in the visual evoked response to the transient presentation of sinusoidal luminance gratings in the range of 0.5-8 c/deg. The components occur at temporal frequencies below the alpha band, with the f1 frequency being roughly half that of the f2 frequency.
A M, Norcia +3 more
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Two prominent frequency components designated f1 and f2 have been identified in the visual evoked response to the transient presentation of sinusoidal luminance gratings in the range of 0.5-8 c/deg. The components occur at temporal frequencies below the alpha band, with the f1 frequency being roughly half that of the f2 frequency.
A M, Norcia +3 more
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2011
Chapter 3 describes, for LTI systems, data-based or nonparametric identification methods that directly provide estimates of the impulse response function g(t) in the frequency domain, G(e jω ). In particular, the empirical transfer-function estimate (ETFE) and the critical point identification method are introduced.
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Chapter 3 describes, for LTI systems, data-based or nonparametric identification methods that directly provide estimates of the impulse response function g(t) in the frequency domain, G(e jω ). In particular, the empirical transfer-function estimate (ETFE) and the critical point identification method are introduced.
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2004
Frequency response methods have a physical explanation that is readily understand able without any mathematics. In addition the methods are design-oriented, link easily between practical results and differential equation methods, and have been proven to work well in many practical design situations.
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Frequency response methods have a physical explanation that is readily understand able without any mathematics. In addition the methods are design-oriented, link easily between practical results and differential equation methods, and have been proven to work well in many practical design situations.
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1978
An important branch of control theory is concerned with the frequency response of a system. This approach to the investigation of system performance provides an alternative to the transient-response and root-locus methods and is favoured by many control engineers, especially those with an electrical-engineering background. The frequency-response method
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An important branch of control theory is concerned with the frequency response of a system. This approach to the investigation of system performance provides an alternative to the transient-response and root-locus methods and is favoured by many control engineers, especially those with an electrical-engineering background. The frequency-response method
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Open-loop frequency response method
Electrical Engineering, 1953SERVOMECHANISM DESIGN and test procedures which are based upon the assumption of system linearity are not satisfactory for many servos. This problem has been summarized in a recent article in this magazine.1 A method for representing the open-loop frequency response of nonlinear systems will be considered which indicates the presence of most nonlinear ...
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Introduction To Frequency Response Methods
1968The concept of frequency response testing has previously been considered in relation to the second-order servomechanism (§8.9). In these considerations the connections between transient and frequency response have been introduced. For higher order systems frequency response methods are extremely valuable for a number of reasons some of which are ...
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