As the central component of active disturbance rejection control (ADRC), the performance analysis and evaluation on the linear extended state observer (LESO) and its extension case with higher extended order are of gr...
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A novel zero-voltage and zero-current switching (ZVZCS) Full-bridge converter is proposed using Asymmetric Phase-shifted PWM control, Current in primary winding during the freewheeling period is reduced to zero by add...
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Marine electromagnetic transmitter transmits large power variable frequency electromagnetic wave to the seabed so as to obtain the submarine structure and mineral resources. The mathematical model of controlled source...
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In view of the problems that dust concentration sensor information (lower) based on field bus cannot swap and output (upper) network’s incompatibilities, in this paper, a workflow hierarchical modeling method with th...
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The paper deals with a modelling of the energy consumption of industrial articulated robots. The proposed modelling way is based on graphically-oriented computer-aided concept that exploits CAD software Solidworks and...
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ISBN:
(纸本)9781479999767
The paper deals with a modelling of the energy consumption of industrial articulated robots. The proposed modelling way is based on graphically-oriented computer-aided concept that exploits CAD software Solidworks and simulation environment MATLAB/Simulink with SimMechanics and SimPowerSystems libraries. These software tools are used for the composition of a dynamical simulation model that represents both mechanical robot structure and robot drives during robot motions. The paper addresses mathematical analysis and interpretation of the considered simulation model. Here, equations of the motion for the mechanical robot structure and appropriate dynamical equations of the robot drives are introduced. Using these equations, the energy consumption equation is defined. The proposed way is demonstrated by simulation experiments for several different velocities of the robot motion along a selected trajectory. For the experiments, industrial articulated robot KUKA KR 5 arc driven by PMSM drives is considered.
In current applications of magnetic induction tomography (MIT) in brain functional imaging, brain tissue is assumed as medium with homogeneous conductivity, and the electroencephalogram (EEG) is neglected. In order to...
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ISBN:
(纸本)9781479961153
In current applications of magnetic induction tomography (MIT) in brain functional imaging, brain tissue is assumed as medium with homogeneous conductivity, and the electroencephalogram (EEG) is neglected. In order to study the effects of EEG signals on MIT detection results, a 2-D four-layer brain model is established by finite element simulation. Izhikevich neuron model is employed to simulate electrical activities of neurons. Three kinds of typical neurons electrical activities are discussed as internal signals. They are regular spiking, fast-spiking, thalamo-cortical for depolarization, respectively. Wavelet energy combined with FFT method is used to analyze the identification of the detection results for the signal with different patterns. The results show that, EEG is detectable by MIT. According to processing results by the wavelet energy combined with FFT method, the patterns of neurons activity signals can be identified through the frequency components.
Due to the characteristics of simple algorithm, low cost and small size sensor, optical flow has shown great potential in aircraft navigation, especially in GPS-denied environment. Optical flow could be used to obtain...
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Due to the characteristics of simple algorithm, low cost and small size sensor, optical flow has shown great potential in aircraft navigation, especially in GPS-denied environment. Optical flow could be used to obtain the aircraft motion information, but the existing methods cannot accurately estimate the 6-DOF motion. The purpose of this paper is to provide a state estimation method based on optical flow from forward and down looking cameras. First, make use of the optical flow distribution shape to get attitude information, and avoid using the unavailable depths by optical flow decoupling. Then, use the attitude information to eliminate the influence rotational motion has on velocity estimation, and compute the depths of feature points captured by down looking camera in a 3D motion, to simplify the optical flow motion field estimation model, and as a result reduce computational complexity. Simulation results show the method presented in this paper is accurate and robust.
The smart lighting control in the new commercial studios and smart homes not only provides the user with better control but also enhances the aesthetic value of the place. This control is achieved by profiling and con...
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The smart lighting control in the new commercial studios and smart homes not only provides the user with better control but also enhances the aesthetic value of the place. This control is achieved by profiling and controlling the lights by using user defined lighting conditions. One possible and a neat way is by using NFC Tags loaded with the user profile details and also the intensity or color details and interface it with the control board that adjust the intensity and color by a simple pulse width modulation and using RGB led matrix panels as lighting elements. The PWM technique varies the light intensity as per the width of the triggering pulse and the desired color profile can be obtained by combining three main colors that is red, green and blue in different proportions. The paper presents an approach to the profiling and control done using Near Field Communication (NFC) technology which is based on short range radio communication. Since most of the new smart phones are also coming with NFC chip enabled thus the profiling can be made mobile and even more personalized. The paper uses a NFC reader on base control board to read a profile from a rewritable tag. So when a Tag is tapped with the base board, the information from the NFC tag is read and sent to microcontroller where the particular light profile is selected from a user defined list of light profiles.
This paper investigates the problem of feedback control design with vibration suppression for a flexible air-breathing hypersonic vehicle(FAHV).FAHV includes intricate coupling between the engine and flight dynamics,a...
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This paper investigates the problem of feedback control design with vibration suppression for a flexible air-breathing hypersonic vehicle(FAHV).FAHV includes intricate coupling between the engine and flight dynamics,as well as complex interplay between flexible and rigid modes,which results in an intractable system for the control *** this paper,a longitudinal model,which is described by a coupled system of ordinary diferential equations(ODEs)and partial diferential equations(PDEs),is ***,a linearized ODE model for the rigid part is established around the trim condition,while vibration of the fuselage is described by ***,based on the Lyapunov direct method,a control law via ODE state feedback and PDE boundary output feedback is designed for the system such that the closed-loop exponential stability is ***,simulation results are given to illustrate the efectiveness of the proposed design method.
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