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This paper concerns the improvements of the isolated symmetry half-bridge bidirectional DC/DC converter when applied in supercapacitor (SC) energy storage system. The guidelines to calculate the ZVS resonance elements were proposed. Meanwhile, a novel model of the converter contains duty ratio as control element was derived. With the model, a phase-shifted plus feed-forward control system was proposed,...
Heat conduction problems with phase change occur naturally in many physical and industrial processes. A moving boundary of these problems results in strong nonlinear. Very few analytical solutions to these problems are obtained. Numerical methods and approximate methods are two kinds of methods solving these problems. Heat Balance Integral Method (HBIM) is an approximate method to effectively solve...
To improve the retrieval rate of contourlet transform texture image retrieval system, a new texture image retrieval system was proposed. In the system, contourlet-S, which was a combination of non-subsampled Laplacian Pyramid and critical subsampled directional filter banks, was used to extract directional information of different scales. Generalized Gaussian Density (GGD) model parameters were cascaded...
The research on emergency logistics risk management is an important research study of emergency logistics. In this paper, we analyzed the emergency logistics characteristics and risk characteristics of emergency logistics, and discussed the related content of emergency logistics risk from five aspects of the technology, environment, management, flexibility, operating. Then we use AHM to establish...
The purpose of this research is to accomplish the ZPETC (Zero Phase Error Tracking Control) Path-Tracking gain-scheduling control design and real-time multi-task flight simulation for the automatic transition of tilt-rotor aircraft. Firstly, we select 20 flight equilibrium points during the automatic transition through the trim operation. For each equilibrium state, we can get a set of Jacobian matrix...
The main contribution of this paper is an analysis of the FastSLAM algorithm for simultaneous localization and mapping (SLAM) problem. The convergence properties of the landmark uncertainty for FastSLAM are provided. The proofs clearly show that the limit of the uncertainty for the landmark estimation has no relationship with the vehicle's initial pose uncertainty. Furthermore, the consistency of...
The choice of the distribution model and the consistency of the result are very important for FastSLAM. This paper provides a method which combines the auxiliary variable model with FastSLAM and, uses Stirling Interpolation to approximate the nonlinear functions. It overcomes the drawbacks of the FastSLAM by using a model ignoring the measurement data and the approximation error for nonlinear functions...
This study presents an H-infinite controller design for time-delay Takagi-Sugeno (T-S) fuzzy systems based on the fuzzy Lyapunov method, which is defined in terms of fuzzy blending quadratic Lyapunov functions. The delay-dependent robust stability criterion is derived in terms of the fuzzy Lyapunov method to guarantee the stability of time-delay T-S fuzzy systems subjected to disturbances. Based on...
An algorithm is proposed to convert every multirate sampled-data system to a set of periodic, state-space equations. This conversion retains the original states and their time sequences and generates less augmented states than those by previously developed techniques [1] - [7]. Thus, multirate sampled-data systems can be analyzed and synthesized using state-space methods, and the serious growth of...
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