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To obtain high-accuracy spectrum, the slant range must be expanded to high order (usually fourth order) using Taylor polynomials for high speed and high maneuvering (HSHM) SAR. But the corresponding spectrum is too complex for image formation. So it's profound to reduce the order of Taylor expansion with the accuracy reserved. The Chebyshev approximation is an optimal uniform approximation method...
In engineering design, to achieve high reliability and safety in multidisciplinary systems, Reliability Based Multidisciplinary Design Optimization (RBMDO) has received increasing attention. In this paper, Mean-value First Order Saddlepoint Approximation (MVFOSA) is introduced and combined with the collaborative optimization (CO) method to deal with the reliability analysis under aleatory uncertainty...
The demand of kinematic accuracy is increasing for modern mechanical systems, while elastic deformation will lead to the decline in kinematic accuracy. This paper examines the application of finite element analysis (FEA) method to kinematic error analysis of elastic mechanisms based on Kineto-Elastodynamics model. The simulation of limit state equations of link mechanisms is performed with Back Propogation...
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