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The probability hypothesis density (PHD) filter handles the measurements periodically, once a scan period. Since measurements have to be gathered for a scan period before the PHD filter can perform a recursion, significant delay may arise if the scan period is long. To reduce this delay, we proposed sequential PHD filter. A Gaussian mixture implementation of the sequential PHD filter for nonlinear...
In this paper a nonlinear attitude tracking control scheme is developed for a small-scaled unmanned helicopter under input constraints. Via the analysis of the properties associated with the helicopter's rotor dynamics, the elevator servo input, the aileron servo input, and the rudder servo input are chosen to be the control inputs to be designed. Their constraints in amplitude under hovering flight...
In this paper, the problem for the control of a class of single-input-single-output (SISO) non-affine nonlinear system with non-varnishing disturbance is investigated. A continuous nonlinear feedback structure is utilized to tackle with the uncertain dynamics in the system. By taking the time derivative of the origin system, a transformed affine-like form is derived. The first order derivative of...
In this paper, space-time fuzzy inference using “Simplified time-change fuzzy set” (sTC fuzzy set) is proposed aiming to simply process the ambiguity knowledge of time change, such as “Distance is gradually near” in a computer. The proposed sTC fuzzy set has four auxiliary sets, which enables the computer regarding the time change correctly in real time based on the expert knowledge. It is applied...
In order to transfer the huge risk of iron ore spot market, to begin with, this paper analyzes the relationship between spot and future price of rebar and presents that rebar futures (RB) in Shanghai Futures Exchange (SHFE) can reflect concerning information efficiently. Secondly, based on the close relationship between SHEF RB settlement price and iron ore price, it attempts to hedge the risk in...
This article presents a surface integral equation solver for efficient analysis of scattering from large-scale and complex piecewise homogeneous structures that may include not only traditional double-positive penetrable materials and perfect-electric conductors but also single/double-negative metamaterials and their junctions. Numerical results validate the accuracy and efficiency of the fast solver...
This paper studies an orthotropic functionally graded piezoelectric plate with arbitrary distributed material properties in cylindrical bending, which is simply supported and grounded on its two opposite edges. The state equations of the functionally graded piezoelectric material are obtained based on the state space approach and a Peano-Baker series solution is obtained for the coupling electroelastic...
Transforms on the spectral domain are often used to compress and extract information of sample features for the supervised classification on hyperspectral images. On condition that the ground samples are all in mass each, there are more obvious advantages on sample classification with obscure spectral features when using Maximum Noise Fraction (MNF) transform, or named two cascaded principal components...
The problem of circular pole assignment for discrete-time singular systems is considered. The goal of the problem is to assign the maximum number of finite eigenvalues in a prespecified circle and guarantee the closed-loop regularity. A simple, effective generalized Riccati equation approach is developed to solve the addressed problem. It is shown that a desired state feedback law is determined by...
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