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.
Papers published on a yearly basis
Papers
More filters
01 Dec 1990
TL;DR: In this article, a constrained adaptive notch filter structure is proposed, which is realized as structurally lossless bounded real functions with a minimum number of delay elements and multipliers, which can be used to track both single and multiple sinusoids in additive broadband noise.
Abstract: New constrained adaptive notch filter structures are proposed. These structures are synthesised from allpass filter sections, which are realised as structurally lossless bounded real functions with a minimum number of delay elements and multipliers. Both structures admit orthogonal tuning of their notch frequency and bandwidth. Frequency tracking is achieved simply by the evaluation of a function of a filter parameter. Connections are shown with the structures used by other workers. Signal enhancement outputs are obtained from both structures and their signal-to-noise improvement ratios are given. The mirror-image pair of polynomials present in a real allpass transfer function is shown to provide a significant simplification in the generation of the necessary gradient terms used in parameter adaptation. Simulations are included to verify the performance of these structures when they are used to track both single and multiple sinusoids in additive broadband noise.
54 citations
TL;DR: In this paper, the authors calculate the 3D vectorial optical transfer function directly from the vectorial pupil function, without making the paraxial assumption nor assuming radially symmetric pupils.
53 citations
01 Jan 1993
TL;DR: In the fast sampling limit, the delta operator model tends to the dynamic system model, which unifies continuous and discrete time control engineering and paves the way for the design of robust computational algorithms.
Abstract: For control system analysis and design, and high-speed real-time computation, the computational formulation, properties and applications of the delta operator model of dynamic physical systems are highlighted. Doubling algorithms for reliable computation are formulated, and the transfer function matrix of the delta operator model is illustrated. In the fast sampling limit, the delta operator model tends to the dynamic system model. This intrinsic property of the delta operator model unifies continuous and discrete time control engineering and paves the way for the design of robust computational algorithms. >
53 citations
TL;DR: In this paper, a method to obtain state-space and transfer function models from thermal networks is introduced, and the transfer function representation is employed to show that changing the physical causality results in an improper transfer function and that when the space temperature has a step variation, the calculated load tends to infinity if the simulation time step approaches zero.
53 citations
TL;DR: In this paper, the authors presented a frequency domain identification method for multi-input, multi-output (MIMO) systems based on experimentally determined frequency response function data, rational polynomial transfer function models of structural systems are identified.
Abstract: This paper presents a new frequency domain identification method for multi-input, multi-output (MIMO) systems. Based on experimentally determined frequency response function data, rational polynomial transfer function models of structural systems are identified. Known physical relationships between the measured variables are incorporated in this MIMO frequency domain identification method. The method has three stages: (1) an initial estimation model is generated using a linear least-squares method, (2) the Steiglitz–McBride method is applied to improve the initial estimation model, and (3) a maximum likelihood estimator is optimized using the Levenberg–Marquardt method. For verification of the method, two experimental studies are conducted using shaking table tests; one is the system identification of a smart base-isolated structure employing a magnetorheological (MR) damper, and the other is for an actively controlled two-story, bench-scale building employing an active mass driver. Using the developed me...
53 citations