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3 results on '"Yebin Wang"'

1. Multiple Time Scalings of a Multi-Output Observer Form.

Author

Yebin Wang and Lynch, Alan F.

Subjects
*OBSERVABILITY (Control theory), *NONLINEAR systems, *TIME series analysis, *TIME-sharing computer systems, *ERROR analysis in mathematics
Abstract

Time scalings in the multi-output observer form for uncontrolled nonlinear continuous-time systems are considered in this technical note. It is the multi-output version of an existing single-input result. Time scaling broadens the class of systems which admits an exact error linearization observer design by including time scaling transformations. The existence conditions of the time scaling transformation and the change of state coordinates to time-scaled observer form are provided. [ABSTRACT FROM AUTHOR]

Published
2010
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2. A Block Triangular Form for Nonlinear Observer Design.

Author

Yebin Wang and Lynch, Alan F.

Subjects
*TRIANGULARIZATION (Mathematics), *NONLINEAR systems, *SYSTEMS theory, *MATRICES (Mathematics), *COORDINATES, *BLOCK designs, *MEASUREMENT, *ANALYTIC geometry, *WORK design
Abstract

This note reconsiders existence conditions for an established block triangular form (BTF) for a broad class of multi-output nonlinear systems. Systems transformable into BTF coordinates allow for decentralized observer design performed subsystem-at-a-time effectively treating upper subsystem states as measurements. Sufficient conditions are given to ensure that the output is linear in BTF coordinates. An example illustrates the BTF construction and a typical observer design. [ABSTRACT FROM AUTHOR]

Published
2006
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3. Sound Absorption Property of Polyurethane Foam with Polyethylene Fiber.

Author

Tongtong ZHU, Shuming CHEN, Wenbo ZHU, Yebin WANG, and Yang JIANG

Subjects
*POLYETHYLENE fibers, *POLYURETHANES, *URETHANE foam, *COMPOSITE materials, ACOUSTIC properties of polymers
Abstract

Flexible polyurethane (PU) foams with varying polyethylene fiber contents were synthesized to improve their acoustic performances. The purpose of this study was to investigate the effects of different polyethylene fiber contents of the PU foams on the resultant sound absorption, which was characterized by the impedance tube technique to obtain the incident sound absorption coefficient. Other parameters related to acoustic absorption performance of polyurethane foams were also measured such as microstructure, porosity and airflow resistivity. In this paper, these parameters were analyzed and compared with those of pure polyurethane foam. The results showed that the acoustic absorption properties of the PU foams were improved especially in the low frequency region by adding polyethylene fiber. When 0.2 g polyethylene fiber was added into the PU foam composite, the sound absorption coefficient is best especially around 125 - 315 Hz. The maximum enhancement in the acoustic properties of the PU foams was obtained by adding 0.1 g polyethylene fiber. [ABSTRACT FROM AUTHOR]

Published
2019
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