This paper presents an adaptive control allocation scheme for the development of a reconfigurable control system, which allows for the redistribution of the control commands to the remaining actuators in the detection...
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ISBN:
(纸本)9789881563842
This paper presents an adaptive control allocation scheme for the development of a reconfigurable control system, which allows for the redistribution of the control commands to the remaining actuators in the detection of actuator failures. The reconfigurable control task is considered as a constrained adaptive control allocation problem, and solved by using gradient algorithms. Simulation results have demonstrated the efficiency of the proposed technique in the presence of different failures of the actuator.
After analyzing gradient algorithms, such as sobel operator, robert operator, prewitt operator and canny operator, an improved method of edge detection of vehicle image is proposed in the study, based on image fusion ...
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ISBN:
(纸本)9781424430567
After analyzing gradient algorithms, such as sobel operator, robert operator, prewitt operator and canny operator, an improved method of edge detection of vehicle image is proposed in the study, based on image fusion at pixel level. The experimental results show that this method can obtain integrated and consecutive vehicle edge’s image and make for the recognition of vehicle type.
Sub-pixel interpolation technique is a way that getting sub-pixel gray value by interpolation algorithm and then it is substituted into the correlation expression to calculate the sub-pixel *** is a key way to improve...
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Sub-pixel interpolation technique is a way that getting sub-pixel gray value by interpolation algorithm and then it is substituted into the correlation expression to calculate the sub-pixel *** is a key way to improve the displacement measurement accuracy in Digital Speckle Correlation Method(DSCM),meanwhile,it is more time consuming than other steps.A new quarter sub-pixel registration method is proposed which can significantly cut down the sub-pixel searching *** the premise of not reducing accuracy,an improved Taylor's series expansion in gradient algorithm is used to get higher registration *** the same time,a new cubic convolution interpolation method is proposed to get extremely high *** conclusions are proved by the results of the experimental system.
This study addresses the collaborative tracking problem for a set of linear systems with noisy measurements using decentralized iterative learning control. The collaborative tracking problem indicates that the desired...
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This study addresses the collaborative tracking problem for a set of linear systems with noisy measurements using decentralized iterative learning control. The collaborative tracking problem indicates that the desired reference trajectory over a finite time interval is required to be precisely tracked by a combination of the outputs of several independent subsystems. A description of the achievable tracking reference and its corresponding input is elaborated. Two decentralized learning schemes are then provided to solve the collaborative tracking problem iteratively. Numerical simulations are given to verify the derived results.
In order to solve the problems of slow tracking speed and low accuracy in vehicle mobile satellite communication system, a new step tracking algorithm based on the steepest descent method was proposed. This algorithm ...
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In order to solve the problems of slow tracking speed and low accuracy in vehicle mobile satellite communication system, a new step tracking algorithm based on the steepest descent method was proposed. This algorithm adjusted the tracking direction and step size by the steepest descent method, and set the proper threshold to stop tracking. The simulation results showed that the numbers of tracking were reduced to17 steps and tracking accuracy is improved.
In this paper, numerical aspects of a sensitivity control for the semi-active suspension system with a magneto-rheological (MR) damper are investigated. A 2-dof quarter-car model together with a 6th order polynomial m...
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In this paper, numerical aspects of a sensitivity control for the semi-active suspension system with a magneto-rheological (MR) damper are investigated. A 2-dof quarter-car model together with a 6th order polynomial model for the MR damper are considered. For the purpose of suppressing the vertical acceleration of the sprung mass, the square of the vertical acceleration is defined as a cost function and the current input to the MR damper is adjusted in the fashion that the current is updated in the negative gradient of the cost function. Also, for improving the handling performance, a weighted absolute velocity of the sprung mass is added to the control law. The implementation of the proposed algorithm requires only the measurement of the relative displacement of the suspension deflection. The local stability of the equilibrium point of the closed loop nonlinear system is proved by investigating the eigenvalues of the linearized one. Through simulations, the passive suspension, the skyhook control, and the proposed sensitivity control are compared.
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