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Trihedral corner reflectors have been widely used as standard point targets for synthetic aperture radar (SAR) calibration. The RCS accuracy of the trihedral corner reflector is vital especially for future high-precision SAR radiometric calibration. In order to reduce the interaction between corner reflector and the ground on which the reflector deployed, and also reduce the edge diffraction through...
In this paper, the policy iteration algorithm for the finite-horizon optimal control of continuous time systems is addressed. The finite-horizon optimal control with input constraints is formulated in the Hamilton-Jacobi-Bellman (HJB) equation by using a suitable nonquadratic function. The value function of the HJB equation is obtained by solving a sequence of cost functions satisfying the generalized...
This paper proposes an approach of part synchronization to identify the unknown parameters of the different structures of uncertain chaotic system. Based on Asymptotic stability theory, we design an observer to identify the unknown parameters in the uncertain chaotic system. At the same time, in order to achieve the different structure of uncertain Lorenz chaotic system and Coullet synchronization,...
Abstract-This paper describes a universal thermal dynamic non-linear model for water tube drum boilers. The model that suit for model-based control is derived from first principles. It can be characterized by a few physical parameters that are easily obtained from construction data and steam tables. And the model is developed which enables the prediction of riser temperature of water tube boilers...
Motivated by the increasing needs in the process industry for designing fault tolerant feedback control systems based on process data, data-driven design of feedback control systems with embedded residual generation is addressed. For this purpose, an extended internal model control (EIMC) structure aiming at accessing the residuals embedded in control loop is first proposed. Based on the identification...
A kinetic model for linear-sweep voltammetry has been developed and modified. The simulation of CdTe electrodeposition has been performed in the acidic electrolyte containing reducible ions of Cd2+ and HTeO2+, and the potential can be predicted to get good quality photosensitive material. A numerical simulation for the stoichiometric determination of electrodepo-sited CdTe thin film is presented for...
Pixel-level image fusion is widely used in many fields. We proposed a pixel-level image fusion algorithm based on particle swarm optimization with local search, that is, PSO-LS, which improves performance further. PSO-LS integrated the self-improvement mechanisms from memetic algorithms and can avoid local minimum in PSO. Experiments were carried out on two real world images. It is shown that fusion...
This paper focus on the time optimal control problems with a class of dependent input constraints while all the input channels are dependent on the others. Based on such a class of constraints, a concept of control elimination is introduced, in which the optimal time will not increase when the idle and redundant input channels have been removed. Then, after examining the normality, we prove the existence...
Indirect optimization for the continuous low-thrust minimum time orbital maneuvers including the transfer, intercept and rendezvous are studied in this paper. The difference among the three maneuvers mainly lie in the terminal constraint conditions. By the Pontryagin maximum principle, the trajectory optimization problem is converted into the two-point boundary-value problem, and the terminal constraint...
Because noise subspace estimation for blind channel estimation can't achieve a good trade-off between convergence speed and steady-state error, and an ambiguous complex coefficient exists between estimated and actual channel impulse response. In this paper, we propose a blind channel estimation algorithm based on noise subspace estimation algorithm with adaptive variable step-size and ambiguous complex...
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