In this paper, we study the flow-level performance of an Orthogonal Frequency Division Multiple (OFDM)-based cellular network with underlay D2D, where the uplink cellular spectrum is shared by the cellular and D2D use...
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In this paper, we study the flow-level performance of an Orthogonal Frequency Division Multiple (OFDM)-based cellular network with underlay D2D, where the uplink cellular spectrum is shared by the cellular and D2D users. In specific, we formulate a coupled processor queuing system with two types of queues to model the flow-level system behavior, where the service rates are derived based on the stochastic point processes of user positions. Since the state space of the queuing model grows exponentially with the number of D2D users and cells, we use the model decomposition and iteration technique to derive its approximate steady-state solution and obtain the flow-level performance in terms of mean delay and energy consumption. Simulations are performed to verify the analytical results under different traffic loads. The proposed flow-level performance model has practical implications for the network deployment and parameter tuning with regard to D2D communications.
In this paper, the envelope-constrained H∗ filtering problem is investigated for a class of discrete time-varying stochastic systems over a finite horizon. The system under consideration involves fading measurements, ...
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Robot force control is an essential issue in robotic intelligence. There is much high uncertainty when robot end-effector contacts with the environment. Because of the environment stiffness effects on the system of th...
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In this study we modified the local binary pattern operator (LBP) to obtain the robust invariant texture patterns for image texture classification. The modified method will be able to calculate patterns which are inva...
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In this paper,a developed multi-fingered dexterous hand with flexible tactile skin is *** dexterous hand has 5-fingers with 6-DOFs and each finger is equipped with a small harmonic drive gear and a fine high-power min...
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In this paper,a developed multi-fingered dexterous hand with flexible tactile skin is *** dexterous hand has 5-fingers with 6-DOFs and each finger is equipped with a small harmonic drive gear and a fine high-power mini *** achieve the goal of grasping with high accuracy,each fingertip is covered with the tactile array sensors for determination of the force between the finger and the grasped *** preliminary experiments are conducted to illustrate the performance of the grasping of the developed dexterous hand.
Circulating Fluidized Bed Boiler (CFBB) is a nonlinear system with large time delay and strong coupling. Faced with the existing problems, a novel active disturbance rejection control (ADRC) design method is proposed ...
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ISBN:
(纸本)9781479917730
Circulating Fluidized Bed Boiler (CFBB) is a nonlinear system with large time delay and strong coupling. Faced with the existing problems, a novel active disturbance rejection control (ADRC) design method is proposed based on effective open-loop transfer function (EOTF). The interaction effects for a particular loop from all the other loops are incorporated into EOTFs so that the system can be approximated as a diagonal transfer function matrix. By doing so, the individual ADRC controller can be designed independently for each single loop. The rest coupling effects beyond the EOTF and the external disturbances are expected to be mitigated by ADRC. Simulation is applied in a CFBB plant. Compared with the conventional control methods, the results show that the method proposed in this paper possesses strong decoupling ability and robustness and demonstrate the feasibility for the multivariable control design.
Based on Lyapunov stability theorem, a MRAC system was researched to solve that differential value of plant output is unknown. Meanwhile an improved design for MRAC system aimed on the factor of restricting convergenc...
A decentralized active disturbance rejection control(ADRC) design method based on effective open-loop transfer function(EOTF) for multi-input/multi-output(MIMO) interactive processes is *** MIMO system is decomposed i...
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ISBN:
(纸本)9781479947249
A decentralized active disturbance rejection control(ADRC) design method based on effective open-loop transfer function(EOTF) for multi-input/multi-output(MIMO) interactive processes is *** MIMO system is decomposed into a set of equivalent single *** coupling effects for a particular loop from all the other closed loops are directly incorporated into the EOTF,and then,the individual controller of each single loop can be designed directly and *** multi-loop ADRC control system has advantages in easy understanding,simple tuning and excellent disturbance rejection *** simulation examples demonstrate that the proposed method is effective.
Model predictive control has been widely applied in process control because of its ability to handle multivariable systems along with loop interactions and constraints. In this paper, an MPC controller that based on a...
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ISBN:
(纸本)9781479947249
Model predictive control has been widely applied in process control because of its ability to handle multivariable systems along with loop interactions and constraints. In this paper, an MPC controller that based on a state-space form was proposed for the Shell gasifier and the parameter tuning methods were concluded for the controller design. Monte-Carlo experiments were utilized to test the robustness of the controller. The simulation results of the proposed controller were compared with the results of a probability-based robust optimal PI controller, and it just shows that MPC controller can achieve a better performance.
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