The Experts below are selected from a list of 9 Experts worldwide ranked by ideXlab platform
Li Guang-quan - One of the best experts on this subject based on the ideXlab platform.
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The Unit-Step Function and Its Function During Laplace transform
Journal of Tianjin Vocational Institutes, 2020Co-Authors: Li Guang-quanAbstract:The paper introduces the definition of Laplace transform,Unitstep function and unit impulse function.It redounds to correctly use Laplace transform by studying the relationship of unit-step function and unit impulse function.Meanwhile,according to some errors met in using Laplace transforms,this paper further studies unit impulse function's property and effect.
Andrey L. Pankratov - One of the best experts on this subject based on the ideXlab platform.
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Long Josephson junctions with spatially inhomogeneous driving
Physical Review B, 2002Co-Authors: Andrey L. PankratovAbstract:The phase dynamics of a long Josephson junction with spatially inhomogeneously distributed bias current is considered for the case of a dense soliton chain (regime of the flux flow oscillator). To derive the analytical solution of the corresponding sine-Gordon equation the Poincare method has been used. In the range of the validity of the theory good coincidence between analytically derived and numerically computed current-voltage characteristics have been demonstrated for two simplest examples of bias current distribution (unbiased tail It is shown, that for the Unitstep function distribution of bias current, there is an optimal length of unbiased tail that maximizes the amplitude of the main harmonic and minimizes the dynamical resistance (thus leading to reduction of a linewidth).
Chyi Hwang - One of the best experts on this subject based on the ideXlab platform.
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Design of Digital PID Controllers for Continuous-Time Plants with Integral Performance Criteria
Journal of The Chinese Institute of Chemical Engineers, 2004Co-Authors: Fang-pi Chang, Chyi HwangAbstract:A new technique is presented in this paper for the optimal design of digital PID controllers with closed-loop and intersample behaviors taken into account. This method is based on minimizing the integral of the squared error (ISE) of the digital controlled system subject to a Unitstep disturbance input. To ensure global optimality of the designed digital controller, a differential evolution algorithm is applied along with an analytic approach to evaluating the ISE cost functional in order to search for the controller parameters. Also, a formula is derived for obtaining the optimal set-point input weighting factors in order to achieve better reference tracking performance. To illustrate the proposed digital PID controller design technique, examples are provided.
Fang-pi Chang - One of the best experts on this subject based on the ideXlab platform.
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Design of Digital PID Controllers for Continuous-Time Plants with Integral Performance Criteria
Journal of The Chinese Institute of Chemical Engineers, 2004Co-Authors: Fang-pi Chang, Chyi HwangAbstract:A new technique is presented in this paper for the optimal design of digital PID controllers with closed-loop and intersample behaviors taken into account. This method is based on minimizing the integral of the squared error (ISE) of the digital controlled system subject to a Unitstep disturbance input. To ensure global optimality of the designed digital controller, a differential evolution algorithm is applied along with an analytic approach to evaluating the ISE cost functional in order to search for the controller parameters. Also, a formula is derived for obtaining the optimal set-point input weighting factors in order to achieve better reference tracking performance. To illustrate the proposed digital PID controller design technique, examples are provided.
