Topic
Transfer function
About: Transfer function is a research topic. Over the lifetime, 14362 publications have been published within this topic receiving 214983 citations. The topic is also known as: system function & network function.
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TL;DR: In this paper, a new form of the transfer functions for karst aquifers, the so-called composite transfer function (CTF), was proposed to simulate discharges by two transfer functions adapted for the quick flow and the slow flow hydrograph component modeling.
90 citations
TL;DR: Two methods of designing a centralized control system for multi-input, multi-output (MIMO) processes are presented and the proposed centralized controllers reduce the interactions better than recently reported decentralized controllers do.
Abstract: In this article, two methods of designing a centralized control system for multi-input, multi-output (MIMO) processes are presented. Centralized proportional–integral (PI) controllers are designed based on a direct synthesis method. The inverse of the process transfer function matrix in the direct synthesis method is approximated based on the relative gain array concept. The method is further improved by using a relative normalized gain array, and an equivalent transfer function for each element in the process transfer function matrix is derived for the closed-loop control system. The transpose of the effective transfer function is used to approximate the inverse of the process transfer function matrix. The simulation studies demonstrate the effectiveness of this method. The proposed centralized controllers reduce the interactions better than recently reported decentralized controllers do. A centralized controller designed based on a relative normalized gain array (RNGA) gives a better performance than a centralized controller designed based on a relative gain array (RGA).
89 citations
TL;DR: The l1-optimal control problem for general rational plants is considered and it is shown that for plants with no poles or zeros on the unit circle an optimal compensator exists and that the resulting closed loop transfer function is polynomial whenever there are at least as many controls as regulated outputs and at leastAs many measurements as exogeneous inputs.
89 citations
01 May 1998
TL;DR: An approach for fitting moments of the impulse response to probability density functions so that delays can be estimated from probability tables and it is demonstrated that the incomplete gamma function provides a provably stable approximation.
Abstract: Moments of the impulse response are widely used for interconnect delay analysis, from the explicit Elmore delay (first moment of the impulse response) expression, to moment matching methods which create reduced order transimpedance and transfer function approximations. However, the Elmore delay is fast becoming ineffective for deep submicron technologies, and reduced order transfer function delays are impractical for use as early-phase design metrics or as design optimization cost functions. This paper describes an approach for fitting moments of the impulse response to probability density functions so that delays can be estimated from probability tables. For RC trees it is demonstrated that the incomplete gamma function provides a provably stable approximation. The step response delay is obtained from a one-dimensional table lookup.
89 citations
TL;DR: A rigorous and simple method for the determination of the modulation transfer function (MTF) of a sampled imaging system is presented by imaging bar patterns and calculating the reduction in amplitude of the fundamental frequency components.
Abstract: A rigorous and simple method for the determination of the modulation transfer function (MTF) of a sampled imaging system is presented. One calculates the MTF by imaging bar patterns and calculating the reduction in amplitude of the fundamental frequency components. The optimal set of bar-pattern frequencies that reduce errors from aliased frequency components is derived. Theoretical and experimental data are presented.
89 citations