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In this paper, linear quadratic stochastic zero-sum differential games for discrete-time Markov jump systems are discussed. It is shown that the existence condition of finite horizon stochastic zero-sum games is equivalent to the solvability of the associated difference Riccati equations, and that of infinite horizon stochastic zero-sum games is equivalent to the solvability of the associated algebraic...
This paper mainly studies one dimensional mean-field backward stochastic differential equations (MFBSDEs) when their coefficient g is uniformly continuous in (y′, y, z), independent of z′ and non-decreasing in y′. The existence of the solution of this kind MFBSDEs has been well studied. The uniqueness of the solution of MFBSDE is proved when g is also independent of y. Moreover, MFBSDE with coefficient...
This paper presents an improved structure for static synchronous compensator (STATCOM) system based on hybrid multilevel H-bridge converter. In the new structure, the chosen of dc capacitor capacitance is considered for every module, which will reduce the dc capacitor capacitance and reduce the cost of the system. A novel system control and dc capacitor voltage balance control strategy is presented...
Non-fragile robust control problem of a fan system is studied. It is pointed out that this problem of the fan system is really a non-fragile robust performance problem, the problem of the fan control system with both non-fragile robust stability and performance requirements(bandwidth and other performances). It is also suggested that the design of the non-fragile robust performance of the fan system...
In this paper, we are concerned with the quantized H∞ control problem for a class of stochastic systems with random communication delays. The system under consideration involves signals quantization, Itô stochastic disturbance as well as random communication delays. The measured output and the control input quantization are considered simultaneously. We aim at designing an observer-based controller...
In this paper, based on the results of complex analysis, we address and analyze some conclusions proposed by V.Blondel et al., which concern the simultaneous stabilization of three linear systems and a special bistabilization problem, named as “Chocolate Problem”. As for the simultaneous stabilization problem of three linear systems, it is shown that there is a slight flaw in the sufficiency part...
The sliding mode control (SMC) problem is investigated for a discrete time-delay nonlinear systems with uncertainties and packet losses. The uncertainties may occur randomly and be assumed to be norm-bounded. The delays are time-varying but bounded functions. Firstly, under the assumption that the dropout probability is known, the states of the system are constructed, and the sliding mode function...
The quaternion theory is used to describe the attitude of spacecraft based on the analysis for several typical description methods of kinematic and dynamic equations and the system model for the attitude of spacecraft is built. The control law design for spacecraft attitude based on non-singular terminal sliding mode control algorithm is proposed using the coupling between kinematic and dynamic equations...
In this paper we consider H2-regularity of pullback attractors for the reaction-diffusion equation. Firstly, we show that under the suitable conditions, every family of bounded subsets of L2(Ω) which is invariant for the process U, is in fact bounded in H2(Ω). Then, as a consequence, we obtain that the system has a unique continuous periodic solution which attracts any bounded set exponentially.
This paper processes the formation problem of multiple agents by assuming multiple virtual leaders. The basic idea is stated as follows: every dynamic agent is equipped with a virtual leader, and the agents reach consensus with their virtual leaders on the velocity and position through assigning stable control laws. Therefore, to solve the formation problem we just need to preset the trajectories...
An improved harmony search algorithm is presented for solving continuous optimization problems in this paper. In the proposed algorithm, an elimination principle is developed for choosing from the harmony memory, so that the harmonies with better fitness will have more opportunities to be selected in generating new harmonies. Two key control parameters, pitch adjustment rate (PAR) and bandwidth distance...
In this academic brief, robust stochastic stability and stabilization for a category of uncertain stochastic systems with multiple time-delays as importantly issues are investigated. Via constructed multiple-interval-dependent Lyapunov-Krasovskii functional, more information between the delays have been considered, some novel criteria for the solvability of above issues are derived defined as LMIs...
Survivability is an important guarantee of the combat system under network combat environment. To appraise a system properly, it's necessary to establish a valid method for evaluating the survivability. According to the characteristics of network war system, this paper studies the primary factors which have important influence on the survivability of such a system, and then abstracts these metrics...
This paper propose a fast human detection algorithm of video surveillance in emergencies. Firstly through the background subtraction based on the single Guassian model and frame subtraction, we get the target mask which is optimized by Gaussian filter and dilation. Then the interest points of head is obtained from figures with target mask and edge detection. Finally according to detecting these pionts...
This paper studies the quantized partial-state feedback stabilization of a class of nonlinear cascaded systems with dynamic uncertainties. Under the assumption that the dynamic uncertainties are input-to-state practically stable, we develop a novel recursive design method for quantized stabilization by taking into account the influence of quantization and using the small-gain theorem. When the dynamic...
This paper presents a characteristic modeling method for continuous/discrete time-varying nonlinear systems, where the model, the first-order time-varying differential equation, is a unified one. Learning identification algorithms are suggested for the purpose of parameter estimation, and the adaptive iterative learning control strategy is proposed for achieving the perfect tracking of the desired...
For the obvious characteristics of time-varying nonlinear controlled object, in order to improve the control performance, the appropriate adaptive control strategy could be used. Based on the research object system of a certain amount of input to control variables, according to Lyapunov stability theory, the research object system input/output variable a model reference adaptive control system was...
The issue of H infinite control for multi-rate networked control systems (NCSs) with both time-delay and packet-dropout is discussed in this paper. Compared with traditional NCSs, the sampling periods of the nodes in multi-rate NCSs are different. Based on Markov theory, a new approach is proposed to convert the multi-rate NCSs into a non-uniform sampling system. A stochastic mean-square sate feedback...
The influencing factor of science and technology industrialization projects is numerous, and evaluation information has characteristic of fuzziness. By analysis and research, the indicator system of science and technology industrialization projects was put forward; combined the analytic hierarchy process with fuzzy decision theory, Comprehensive assessment and ranking were carried out for the selected...
Considering the development situation of each object in different time interval in the dynamic evaluation problem, we provide a method with the feature of reward and punishment. In this method, the evaluation information participates in evaluation in the form of a whole vector. Then the timing weights are determined by the TOPSIS method, which can express the purpose of reward and punishment. Based...
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