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This paper deals with model reduction by balanced truncation of fault tolerant switched systems. The conditions, which guarantee the stability of fault tolerant switched system and the error between the states of switched system and reduced order switched system is in a certain range, are proposed. It shows that fault tolerant switched system can be reduced by the same truncated of original switched...
The induction motor system is dynamically formulated by both the mechanical and electrical equations. In system identification of an induction motor, main objective is to compare parameters between identified by using rotating speed and that by both rotating speed and robust observer. The real-coded genetic algorithm (RGA) is adopted to identify all parameters, and the reduced-order robust observer...
This paper introduces the status of social recommender system research in general and collaborative filtering in particular. For the collaborative filtering, the paper shows the basic principles and formulas of two basic approaches, the user-based collaborative filtering and the item-based collaborative filtering. For the user or item similarity calculation, the paper compares the differences between...
An adaptive actuator failure compensation scheme is developed for attitude tracking control of a spacecraft with four reaction momentum wheels, in the presence of unknown spacecraft inertia parameters, nonlinear dynamics of wheel angular momentum and uncertain actuator failures. The proposed scheme employs a composite adaptive control design which incorporates an adaptive backstepping feedback control...
In this paper, an LQ control based actuator failure compensation control scheme is developed for possibly nonminimum phase systems with actuator failures. The failure compensation control problem is formulated as a new LQ control problem for systems with failure disturbances. A new disturbance rejection problem for systems with unmatched disturbances is solved through an LQ based control algorithm...
Building an equivalent model of small and mediumsized hydropower generator group is a practical method carried out for dynamic analysis of water electricity grid. Excitation and governor system have prominent influences on the precision of the equivalent model. This paper presents a method to build a dynamic equivalent model of hydropower generator units containing excitation and governing system,...
This paper conducts a survey on aircraft dynamic models under atmosphere turbulence conditions, for the study of adaptive turbulence rejection flight control, an open area of research of both theoretical and practical importance. The survey starts from the basic nonlinear dynamic and kinematic equations of aircraft under turbulence disturbances, and then addresses the basic linearized longitudinal...
A double-loop control system based on human simulated intelligent control (HSIC) is designed using a mathematical model of a brushless direct current motor. The system includes a PI current controller and an HSIC speed controller, and controller parameters are set and optimized using an improved genetic algorithm. In the double-loop motor control system, a characteristic model-based multi-mode controller...
Meta-search is a search engine that sends users' requests to several other search engines and/or databases and returns the results from each one. Concepts are defined in a semantic network that contains links to the original terms. This article provides a framework of three layers, meta-search layer, concept layer, concept clustering and sorting layer to guide user to refine the query terms. The first...
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