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In Cyber-Physical Systems large numbers of heterogeneous cyber and physical subsystems are networked, are interacting tightly, may change dynamically and may expand or contract. Designing and preserving properties of a CPS over its lifespan is very challenging. Passivity and dissipativity are energy like concepts that offer great promise in guaranteeing properties, such as stability, in complex heterogeneous...
Control science is basically a model based discipline. The performance of control is determined by the accuracy of the model representing data. Therefore the successes of identification reflects into the successes of control. This is why identification and control have had a never-ending interplay over so many decades. In this paper we try to outline such interplay by making reference to one of the...
This paper addresses issues relating to the modeling and control of grinding mill circuits as used in minerals processing, with a particular emphasis on (semi) autogenous grinding or SAG mills. SAG mill circuits are generally difficult to control due to the presence of strong external disturbances, poor process models and the unavailability of important process variable measurements. In addition,...
Oscillations are often observed in nature at multiple levels, and form a basis for sustained operation of various functionalities. The objective of this plenary lecture is to introduce biological principles for coordinated oscillations to the control engineering community, and to provide a tutorial overview of recent developments on the analysis and design of dynamical mechanisms for oscillations,...
We are living in an era of networks. Networks, mainly the transportation and communication networks, have played critical roles in history. The world has been transformed our societies and economies on different networks from physical networks to more abstract networks comprising: financial networks, environmental networks, social, and knowledge networks, as well as their combinations. Networks in...
The concept of cybernetics based on human thinking process is pointed out in the field of intelligent control and human simulated intelligent control, the differences between human simulated intelligent control and human thinking simulated control are discussed in this paper, the control process and features of human control thinking are analyzed, including iconic imagery control thinking, abstract...
The concept of cybernetics based on human thinking process is pointed out in the reference paper[1]. Hunan thinking is based on Language, concepts of the language play an important role during human thinking process. Some control concepts related to human control thinking should be defined in order to make computer simulate human control thinking. In this paper many concepts related to controlled...
The paper deals with the quadratic L2 gain performance LPV realization of parametric transfer functions. It is shown that any parametric transfer function, which has L2 gain performance with a bound for all constant parameters values, admits a state space realization guaranteeing quadratic L2 gain performance with the bound under arbitrary parameter variations. A reasonably general procedure is provided...
This paper investigates the H∞ output tracking control problem for a class of cascade switched nonlinear systems. The solvability conditions for the H∞ output tracking control problem are developed. Under a designed switching law, the tracking control problem of a switched nonlinear system is solvable if the subsystems satisfy certain conditions. A controller is also designed to solve the H∞ output...
This paper aims at the H∞ fixed-interval smoothing problem for linear continuous-time systems with l + 1 time-delay observations. Such problem will be converted into H2 fixed-interval smoothing problem for linear time-delay systems in indefinite space. Therefore, the H∞ fixed-interval smoothing problem is solved by using the orthogonal projection theory in indefinite space, and the fixed-interval...
This paper deals with the problem of infinite time linear quadratic differential games for discrete-time singular systems, including nonzero-sum case and zero-sum case. Considering the admissibility of discrete-time singular systems, two sufficient conditions about the differential games are obtained, which provide the optimal strategies and the optimal cost functions via some coupled equations and...
In this paper, we discuss convergent splittings of sub-positive definite matrix A over quaternion field. Meanwhile, the QSOR iterative algorithm of the sub-positive definite linear systems AX = B over quaternion field are structured, and convergence of the algorithm is described by using right eigenvalue maximum norm of the quaternion matrix, and the optimal range of parameters are obtained. Secondly,...
This paper investigates the general logical expression of k-valued and mix-valued pseudo-logical functions. First, by constructing multi-valued logical operators, we present the general logical expression of k-valued pseudo-logical functions. Second, we consider the most general case of mix-valued, and establish the logical expression of mix-valued pseudo-logical functions. Finally, we convert the...
In this paper, the full-order and reduced-order observer design for a class of so-called differential Lipschitz nonlinear systems is investigated. Based on the differential mean value theorem (DMVT) and an important matrix inequality, we propose sufficient conditions for the existence of the observers of the class of nonlinear systems. The proposed sufficient conditions are given in terms of linear...
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