In this paper, the performance of a free chattering sliding mode controller has been modified by neural network in order to decrease the consumption of energy. In other word, the final goal is to decrease the switchin...
详细信息
In this paper, the performance of a free chattering sliding mode controller has been modified by neural network in order to decrease the consumption of energy. In other word, the final goal is to decrease the switchin...
详细信息
In this paper, the performance of a free chattering sliding mode controller has been modified by neural network in order to decrease the consumption of energy. In other word, the final goal is to decrease the switching part of the control signal to the lowest level such that under this condition the system states converge to the sliding surface. The designed controller is applied to a flexible-link to control the endpoint position. The flexible-link has one degree of freedom and rotates in horizontal plane. The dynamic model was obtained from an experimental setup. Simulation results reveal the effectiveness of the proposed approach.
Much more extensibility of matter element systems i.e. the accumulation , combination and separability of system things, characteristics, values, relationships, structures, component elements and systems is given and ...
详细信息
Much more extensibility of matter element systems i.e. the accumulation , combination and separability of system things, characteristics, values, relationships, structures, component elements and systems is given and some reasoning based on the extensibility is offered. The extensibility and reasoning are abundant basis for us to solve system problems, especially to solve contradictory problem. Especially the reasoning based on the extensibility is an useful model of innovation design for products and artificial living agents.
The paper presents results achieved during realization of the international project DAMADICS ( Development and Application of Methods for Actuator Diagnosis in Industrial control Systems ). The proposed fault detectio...
详细信息
The paper presents results achieved during realization of the international project DAMADICS ( Development and Application of Methods for Actuator Diagnosis in Industrial control Systems ). The proposed fault detection and isolation system is designed using a bank of dynamic neural networks. Each network is trained using a stochastic approximation method, which can be viewed as a fast alternative to back-propagation based algorithm. Simulation results are carried out using the real process data recorded at the Lublin Sugar Factory, Poland.
Two prototypes of reconfigurable antenna structure applicable to 3G communication systems are presented in this paper. The first one was designed to operate at 2.45 GHz and to steer the radiation beam from 60/spl deg/...
详细信息
Two prototypes of reconfigurable antenna structure applicable to 3G communication systems are presented in this paper. The first one was designed to operate at 2.45 GHz and to steer the radiation beam from 60/spl deg/ to 120/spl deg/ with a step of 5/spl deg/, by reconfiguring the feed elements. The second antenna is a V-antenna array with resonance frequency at 1.9 GHz and was constructed to full characterize the radiation pattern of this type of antenna.
The authors present a study of the finite word length (FWL) implementation for digital controller structures with sparseness consideration. A closed-loop stability related measure is derived, taking into account the n...
详细信息
The authors present a study of the finite word length (FWL) implementation for digital controller structures with sparseness consideration. A closed-loop stability related measure is derived, taking into account the number of trivial elements in a controller realisation. A practical design procedure is presented, which first obtains a controller realisation that maximises a lower bound of the proposed measure, and then uses a stepwise algorithm to make the realisation sparse. Simulation results show that the proposed design procedure yields computationally efficient controller realisations with an enhanced FWL closed-loop stability performance.
An innovative watermarking scheme based on progressive transmission with genetic algorithms (GA) is proposed. We implement the watermarking embedding and extraction system in the discrete cosine transform (DCT) domain...
详细信息
An innovative watermarking scheme based on progressive transmission with genetic algorithms (GA) is proposed. We implement the watermarking embedding and extraction system in the discrete cosine transform (DCT) domain, and apply the JPEG spectral selection mode for progressive transmission. By employing GA with a proper fitness function into the watermarking system, both the watermark imperceptibility and watermark robustness requirements are considered and optimized. In addition, the embedded watermark can be partly extracted in the receiver side even when the watermarked image is being transmitted. Simulation results show both the robustness and the effectiveness of progressive transmission under different attacking schemes and different bandwidth variations.
The cooperative mechanism is one main issue in the decentralized supply chain system, especially in an asymmetric information structure. We analyze the non-cooperative game behavior of a 2-echelon distribution supply ...
详细信息
The cooperative mechanism is one main issue in the decentralized supply chain system, especially in an asymmetric information structure. We analyze the non-cooperative game behavior of a 2-echelon distribution supply chain, compare the results with the system optimal solution, and give the supplier dominated cooperative mechanisms. We also analyze the validity of our contract under the asymmetric retailers' holding cost information and give some useful conclusions.
Magnetic measurement is a typical inverse problem in Biomedical field. In this kind of problem we always need to locate the positions and moments of one or more magnetic dipoles. Although using the traditional methods...
详细信息
Magnetic measurement is a typical inverse problem in Biomedical field. In this kind of problem we always need to locate the positions and moments of one or more magnetic dipoles. Although using the traditional methods to solve this kind of inverse problem has all kinds of shortcomings, BPNN (Back Propagation Neural Networks) method can be used to solve this typical inverse problem fast enough for real time measurement. In the traditional BPNN method, gradient descent search method is performed for error propagation. In this paper the authors propose a new algorithm that Newton method is performed for error propagation. For the cost function is highly nonconvex in the magnetic measurement problem, the new kind of BPNN can get convergent results quickly and precisely. A simulation result for this method is also presented.
暂无评论