the author present a study of the finite word length (FWL) implementation for digital controller structures using /spl delta/-operator. the closed-loop roundoff noise gain using /spl delta/-operator is defined and ana...
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ISBN:
(纸本)0780386531
the author present a study of the finite word length (FWL) implementation for digital controller structures using /spl delta/-operator. the closed-loop roundoff noise gain using /spl delta/-operator is defined and analyzed based on stochastic controltheory. the optimal controller realizations are obtained via minimizing the roundoff noise gain. A numerical example is presented to illustrate the design procedure and the effectiveness of the proposed strategy.
Particle filters are for the first time introduced into the passive position location estimation. It is shown that the standard particle filter in this case suffers from "sample impoverishment" seriously. Ad...
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ISBN:
(纸本)0780386531
Particle filters are for the first time introduced into the passive position location estimation. It is shown that the standard particle filter in this case suffers from "sample impoverishment" seriously. Adaptive resampling and regularization operations are suggested to solve the problem. Numerical simulations show that under large initialization errors, the particle filtering significantly improves the location estimation performance compared withthe conventional estimation methods.
An investigation was initiated on the study of the kinematic mapping between human hand and the non-anthropomorphic robot hand. To account for the significant dissimilarities between them, a "virtual circle mappi...
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An investigation was initiated on the study of the kinematic mapping between human hand and the non-anthropomorphic robot hand. To account for the significant dissimilarities between them, a "virtual circle mapping" method has been developed based on the fingertips' relative positions. the principle of the method is to find suitable parameters in the hand frame, transform them to the robot frame, and then compute the robot fingertip positions according to the transformed parameters. the preliminary results and the comparison withthe point-to-point mapping results are presented and analyzed. the generalization of the relative-position based mapping idea is also discussed.
Based on the observation on human being's driving behavior, this paper proposed a multi-agent based architecture for outdoor mobile robot navigation with self-organization. As the environment keeps dynamically cha...
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ISBN:
(纸本)0780386531
Based on the observation on human being's driving behavior, this paper proposed a multi-agent based architecture for outdoor mobile robot navigation with self-organization. As the environment keeps dynamically changing, the robot should generate different actions suitable to the changing environment. Withthe support of a distributed communication infrastructure and an event-driven situation evaluation agent, the proposed control architecture can be dynamically reorganized according to the dynamical changes in the environment.
the increasing outbreaks of computer viruses lead to a significant threat to the Internet. In this review we firstly give a brief introduction of computer virus including definition, classification, and characteristic...
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ISBN:
(纸本)0780386531
the increasing outbreaks of computer viruses lead to a significant threat to the Internet. In this review we firstly give a brief introduction of computer virus including definition, classification, and characteristics. then we turn on the overview that how viruses spread on networks in different topologies, especially in the context of computer viruses spreading on the Internet. Recent epidemic studies on the uncorrelated and correlated networks in terms of homogeneity and heterogeneity have been reviewed and compared their distinctions with regard to the main characteristic in epidemiology: epidemic threshold.
We model the range image segmentation problem in the framework of Bayes inference and Markov random field. thereafter an extended ICM algorithm is presented in this paper. We introduce another estimation (surface para...
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ISBN:
(纸本)0780386531
We model the range image segmentation problem in the framework of Bayes inference and Markov random field. thereafter an extended ICM algorithm is presented in this paper. We introduce another estimation (surface parameter set A) into the basic ICM algorithm and also propose to use edge-based segmentation as the initial state for subsequent energy minimizing procedure. theoretical and experimental analysis of convergence is given. We have shown that in this way a little computation brings forth a high-quality segmentation.
Shape from shading (SFS) is an important domain in computer vision. At first the paper introduces a method of shape from shading based on single image and puts forward its implementation. then adds proper boundary con...
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ISBN:
(纸本)0780386531
Shape from shading (SFS) is an important domain in computer vision. At first the paper introduces a method of shape from shading based on single image and puts forward its implementation. then adds proper boundary conditions and adjusts the factor of brightness error function adaptively according to the results by the original algorithm, and finds accuracy of the improved algorithm by the synthesized image. At last the improved algorithm is applied to the surface height reconstruction of weld successfully, and the computing is accurate enough for the inspection on shape of weld.
In recent decades, active vision systems have been studied widely because they can controlthe gaze direction of their mounted vision sensors and overcome many shortcomings of passive vision systems which have fixed v...
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ISBN:
(纸本)0780386531
In recent decades, active vision systems have been studied widely because they can controlthe gaze direction of their mounted vision sensors and overcome many shortcomings of passive vision systems which have fixed vision sensors. Due to an increasing interest in humanoid robots and social robots, many researchers in the active vision area are focusing their research on developing active vision systems with socially interacting with humans. In this paper, we discuss an active vision system developed for interaction with humans, and we introduce a fast and simple system architecture which includes a high-speed serial communication bus (IEEE 1394a). In addition, we propose a distributed and jerkbounded control algorithm to ensure smooth system motion.
In this paper, hybrid impulsive and switching control of nonlinear systems and its application to chaotic systems are considered. Using switched Lyapunov functions, some new general criteria for exponential stability ...
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In this paper, hybrid impulsive and switching control of nonlinear systems and its application to chaotic systems are considered. Using switched Lyapunov functions, some new general criteria for exponential stability and asymptotical stability of hybrid impulsive and switching nonlinear systems are established and, particularly, some simple criteria for chaos suppression are presented. A new hybrid impulsive and switching control strategy for chaos control is developed. A typical example, the unified chaotic system, is given for illustrating and visualizing the theoretical results.
By using generalized Riccati equations, a method of designing observer-based feedback controllers against sensor failures for detectable descriptor linear systems is presented. A parameterization of the observer-based...
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ISBN:
(纸本)0780386531
By using generalized Riccati equations, a method of designing observer-based feedback controllers against sensor failures for detectable descriptor linear systems is presented. A parameterization of the observer-based fault-tolerant feedback controllers is provided. the controller designed by the proposed method guarantees that the closed-loop system is regular, impulse-free and stable in the normal condition as well as in the event of sensor failures. A numerical example shows the effect of the proposed method.
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