The global and local stability of process systems in generalized Lotka-Volterra form is studied in this paper using entropy-like and quadratic Lyapunov function candidates. The global stability check for LV models is ...
详细信息
The global and local stability of process systems in generalized Lotka-Volterra form is studied in this paper using entropy-like and quadratic Lyapunov function candidates. The global stability check for LV models is performed by solving an LMI for a diagonal positive semi-definite matrix using singular perturbation technique. It is shown that a quadratic Lyapunov function can also be determined by solving linear matrix inequalities (LMIs). In addition, the quadratic stability neighborhood is convex in the space of the quasi-monomials and can be estimated by computing its corner points using LMIs. Furthermore, it is proved that quadratic stability with a diagonal weighting matrix enables to construct a dissipative-Hamiltonian description of the system. The developed methods are illustrated on the model of a continuously stirred tank reactor with a nonlinear reaction system.
This study is an effort to give a practical solution in the problem of optimizing the structure of the hierarchical mixture of experts model, which is a natural extension of the associative Gaussian mixture of experts...
详细信息
This study is an effort to give a practical solution in the problem of optimizing the structure of the hierarchical mixture of experts model, which is a natural extension of the associative Gaussian mixture of experts system. We present two novel methods for optimizing such structures using genetic algorithms. Special concern is taken for reducing the computational time so as to efficiently allow the structure to "grow" while it evolves with the genetic algorithm. The main contribution of the paper lies on the efficient, topologically oriented, representations of such architectures so as to be optimized through involving genetic algorithms.
This paper presents a case study of the TP (tensor product) model transformation in the control of a nonlinear benchmark problem. We design a nonlinear controller of translational oscillation with an eccentric rotatio...
详细信息
This paper presents a case study of the TP (tensor product) model transformation in the control of a nonlinear benchmark problem. We design a nonlinear controller of translational oscillation with an eccentric rotational proof mass actuator (TORA) system via TP model transformation and LMI (linear matrix inequality) based controller design technique that is also capable of the reference signal tracking control. The main contribution of the paper is to show that both numerical methods the TP model transformation and the LMI can readily be executed by computer independently on the given problem and without analytical derivations, which, hence, leads to a fast way of controller designs for a class of engineering control problems. Numerical simulation is used in the paper to provided empirical validation of the control results.
In an Internet-based control system, particular human operations may violate desired requirements and lead to destructive failure. For such human-in-the-loop systems, this paper extends the remote supervisory scheme b...
详细信息
ISBN:
(纸本)4907764227
In an Internet-based control system, particular human operations may violate desired requirements and lead to destructive failure. For such human-in-the-loop systems, this paper extends the remote supervisory scheme by Lee and Hsu (2003) to a modular one so as to reduce the supervisor synthesis complexity. Also, remote human issued commands are guaranteed to meet required specifications. A rapid thermal process in semiconductor manufacturing systems is provided to show the practicability of the proposed approach.
The interaction balance method (IBM) with fuzzy constraints is proposed for large-scale industrial processes under hierarchical steady-state optimization with the consideration of the model-reality difference and the ...
详细信息
The interaction balance method (IBM) with fuzzy constraints is proposed for large-scale industrial processes under hierarchical steady-state optimization with the consideration of the model-reality difference and the constraints of subprocesses being flexible. In this approach, the models that are treated as equality constraints and the inequality constraints of the subprocesses are all fuzzified. Two cases of interaction balance method are studied: the open-loop IBM and the IBM with global feedback. Simulation results show that the solutions of the proposed method with global feedback are very close to the optimal solutions of the real process.
A direct method of nonlinear control design is presented in this paper that is based on a simplified hybrid model of the electro-pneumatic protection valve used for circuit pressure limiting function of commercial veh...
详细信息
A direct method of nonlinear control design is presented in this paper that is based on a simplified hybrid model of the electro-pneumatic protection valve used for circuit pressure limiting function of commercial vehicle air supply systems. The dynamic model analysis is performed to meet the control design requirements, the hybrid behaviour is investigated in more details. The proposed bang-bang controller fulfils the predefined optimality criteria that is achieved by numeric optimization.
In this paper the idea of input reconstruction by means of system inversion is discussed. In view of the latest results of geometrical system theory the properties of the inverse is characterized. It is shown how the ...
详细信息
The zero dynamics of simple continuous and fed-batch biore-actors is investigated in this paper for different input and output selections. A function λ generating the necessary coordinates transformation has been det...
详细信息
In this paper the idea of input reconstruction by means of system inversion is discussed. In view of the latest results of geometrical system theory the properties of the inverse is characterized. It is shown how the ...
详细信息
In this paper the idea of input reconstruction by means of system inversion is discussed. In view of the latest results of geometrical system theory the properties of the inverse is characterized. It is shown how the dynamic inversion approach can be used to construct residual generators to fault detection and isolation. Linear and nonlinear systems with vector relative degree are considered.
This paper presents the concept and practical realization of the testing methodology of safety-critical supervisory systems. The test concept utilizes the highly redundant nature of these systems to conduct test durin...
详细信息
This paper presents the concept and practical realization of the testing methodology of safety-critical supervisory systems. The test concept utilizes the highly redundant nature of these systems to conduct test during the normal operation of the monitored process. The described principles have been implemented in the form of microcomputer-based test systems.
暂无评论