This paper presented a hierarchical fuzzy path following control scheme based on different fuzzy grain size in a class of unknown environment with static *** employing fine-grained fuzzy division and design of fuzzy r...
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This paper presented a hierarchical fuzzy path following control scheme based on different fuzzy grain size in a class of unknown environment with static *** employing fine-grained fuzzy division and design of fuzzy rule table for the rotation angle and speed of a robot,a more accurate path following control was achieved,while more effective fuzzy obstacle avoidance was realized with coarse-grained fuzzy division *** proposed controller was a two-leveled architecture in which the higher level was the decision-making of the sub-task switching of path following or obstacle avoidance,while the lower level was motion control of path following and fuzzy obstacle ***,the simulation experiments were carried out to demonstrate the feasibility and effectiveness of the proposed scheme.
In this paper,an iterative adaptive dynamic programming(ADP) algorithm is developed to solve the optimal cooperative control problems for residential multi-battery *** avoid solving high-dimensional optimal control pr...
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In this paper,an iterative adaptive dynamic programming(ADP) algorithm is developed to solve the optimal cooperative control problems for residential multi-battery *** avoid solving high-dimensional optimal control problems,we first constrain all the batteries at their worst performance,which transforms the multi-input optimal control problem into a single-input *** on the worst-performance optimal control law,the optimal cooperative control law for the residential multi-battery systems is obtained,where in each iteration,only a single-input optimization problem is ***,numerical results are given to illustrate the performance of the developed algorithm.
We experience changes in stationarity/time variance in many practical applications. Since changes modify the operational framework the application is working with, its accuracy performance is in turn affected. When ch...
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ISBN:
(纸本)9781479975617
We experience changes in stationarity/time variance in many practical applications. Since changes modify the operational framework the application is working with, its accuracy performance is in turn affected. When changes can occur, we need to detect them as soon as possible, in general by inspecting features extracted from data, and afterwards intervene to mitigate their effects. In this paper, we propose a novel change detection test based on the least squares density difference estimation. Neither assumptions about the distribution of features are needed, nor the change types are made (the method is pdf-free and can handle arbitrary changes.). What here proposed requires limited data to become operational and thresholds needed to assess the change can be set met to predefined false positive rates. We show through comprehensive experiments the effectiveness of the detection method and point out how it outperforms other related methods.
For the dynamic obstacle avoidance problem in a unknown environment,a second-order fuzzy control strategy is proposed based on fuzzy *** the observation and analysis of the perception information of the delta speed an...
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ISBN:
(纸本)9781479970186
For the dynamic obstacle avoidance problem in a unknown environment,a second-order fuzzy control strategy is proposed based on fuzzy *** the observation and analysis of the perception information of the delta speed and the delta deviation angle of a detected dynamic obstacle,the robot then make decision to efficiently avoid dynamical ***,a two hierarchical control scheme is designed,where the upper level is to determine the deflection angle according to delta of speed and direction of dynamic obstacles,and the lower one is to derive the speed of a robot by employing the output of the upper level and the distance between the robot and dynamic *** simulations are demonstrated that the proposed scheme is effective and efficient.
In this paper, a human robot shared control strategy is developed and tested on a Baxter robot. Using the proposed method, the human operator only needs to consider the motion of the end-effector of the manipulator, w...
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In this paper, a human robot shared control strategy is developed and tested on a Baxter robot. Using the proposed method, the human operator only needs to consider the motion of the end-effector of the manipulator, while the manipulator will avoid obstacle by itself without sacrificing the end effector motion performance. An improved obstacle avoidance strategy based on the joint space redundancy of the manipulator is designed. A dimension reduction method is presented to solve the over defined problem of avoiding velocity to achieve a more efficient use of the redundancy. By employment of an artificial parallel system of the teleoperate manipulator and the task switching weighting factor, the proposed control method enable the robot restoring back to the commanded pose smoothly when the obstacle is removed. By implementing the dimension reduction method, the trajectory of each joint of the manipulator can be controlled at the same time to achieve the restoring task. Thus, the proposed control method can eliminate the impact of the obstacle on the remaining task. Satisfactory experiment results demonstrate the effectiveness of the proposed methods.
In this paper,based on echo state network(ESN),a data-driven method is developed to solve the room classification problem of office *** developed method is divided into two *** the data of electricity consumption,whic...
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ISBN:
(纸本)9781479970186
In this paper,based on echo state network(ESN),a data-driven method is developed to solve the room classification problem of office *** developed method is divided into two *** the data of electricity consumption,which are classified into electricity consumption from sockets,lights and air-conditioners for a typical room in an office building,the first step is to reconstruct the behavior of electricity consumption in three types by using three *** second step is to classify the room into a certain category of office room,computer room,storage room and meeting room by establishing another *** developed method fully utilizes the outstanding performance of ESN in chaotic time-series prediction and *** study on an office building illustrates the accuracy and effectiveness of the developed method.
In this work,a finite-horizon optimal control problem for first-order plus time delay(FOPTD) processes is *** show that if the control horizon is greater than three and the prediction horizon is great than the control...
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In this work,a finite-horizon optimal control problem for first-order plus time delay(FOPTD) processes is *** show that if the control horizon is greater than three and the prediction horizon is great than the control horizon plus the time delay in discrete time,the optimal controller is not affected by either of the two ***,under these conditions,the controller parameters are explicitly calculated,the closed-loop system is shown to be stable,and the controller is *** problem considered is related to the results on linear quadratic regulation of linear systems with time delays;however,the detailed parameterization of the state-space model introduced by the FOPTD process provides an additional opportunity to investigate the exact controller structure and properties(e.g.,the locations of the closed-loop poles),which are also the major difficulties encountered and overcome in this *** problem is motivated from phenomena experienced in designing industrial model predictive control(MPC) tuning algorithms,and extensive numerical examples indicate that the proposed results speed up the MPC autotuning algorithms by 70%.
In this paper, the principle of the kernel extreme learning machine (ELM) is analyzed. Based on that, we introduce a kind of multi-scale wavelet kernel extreme learning machine classifier and apply it to electroenceph...
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ISBN:
(纸本)9781479987313
In this paper, the principle of the kernel extreme learning machine (ELM) is analyzed. Based on that, we introduce a kind of multi-scale wavelet kernel extreme learning machine classifier and apply it to electroencephalographic (EEG) signal feature classification. Experiments show that our classifier achieves excellent performance.
In this paper, a radial basis function (RBF) neural network (NN) identifier based approximate constrained optimal guidance law is proposed for Mars entry vehicles guidance. Firstly, an RBF NN identifier is used to ide...
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In this paper, a radial basis function (RBF) neural network (NN) identifier based approximate constrained optimal guidance law is proposed for Mars entry vehicles guidance. Firstly, an RBF NN identifier is used to identify the system uncertain parameters. With the identified parameters, the optimal guidance problem of Mars entry vehicles is transformed into an optimal tracking control one, which depends on the solution of the Hamilton-Jacobi-Bellman (HJB) equation. Due to the control input constraints, a generalized non-quadratic performance function is proposed. In general, the HJB equation is a nonlinear partial differential equation that is difficult or even impossible to be solved analytically. We use an NN to solve the HJB equation approximately. Finally, the Monte-Carlo simulation results on the Mars entry vehicles demonstrate the effectiveness of the proposed method.
With the smart monitoring being widely concerned recently, substations have been introducing smart monitoring system. In this paper, we propose a vision-based recognition method for transformers in substation via comb...
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ISBN:
(纸本)9781479987313
With the smart monitoring being widely concerned recently, substations have been introducing smart monitoring system. In this paper, we propose a vision-based recognition method for transformers in substation via combining with AdaBoost and a multi-template matching method. The proposed method works by dividing the whole process into two parts, namely coarse detection and fine recognition. In coarse detection, haar features of training samples in each sub-region are extracted and then AdaBoost algorithm is utilized for training and detecting. After coarse detection, we then perform fine recognition using multi-template matching with histogram intersection. Experimental results demonstrate that our method has a higher recognition precision and it is superior and more effective than the conventional AdaBoost method.
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