In this paper, a nonlinear adaptive control of a 3D overhead crane is investigated. A dynamic model of the overhead crane is developed, where the crane system is assumed as a lumped mass model. Under the mutual effect...
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A proposed mathematical model is established for modal analysis of a micro manipulator. According to the geometric characteristics of the manipulator, the model is built by using finite element method with multipoint ...
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This paper is concerned with the design of linear matrix inequalities (LMIs) based optimal state-feedback controller design for seismically excited asymmetric structures (AS) having stiffness irregularities. The syste...
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This paper is concerned with the design of linear matrix inequalities (LMIs) based optimal state-feedback controller design for seismically excited asymmetric structures (AS) having stiffness irregularities. The system is modelled in terms of mass, natural frequencies, damping ratio and eccentricities to easily obtain torsionally flexible (TF) model. A one storey, two-way asymmetric structural system is used to illustrate the effectiveness of the approach through simulations. The modelled system has bi-lateral and rotational degrees of freedom. Frequency responses show the effectiveness of proposed controller by means of a decrease in the peak values of translation at each resonance frequency. Moreover, the time domain simulation results, acquired by using real time-history data of San Francisco and El Centro Earthquakes also show that proposed controller is very effective in reducing vibration amplitudes of each direction by applicable control signals and guaranteeing the stability of the closed loop system.
An improved wavelet filtering algorithm is put forward based on the mean-value filtering function in this paper for the spin echo signal of Nuclear Magnetic Resonance Logging (NMRL), the Signal to Noise Ratio (SNR) of...
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The main objective of this paper is to perform a robust controller design using discrete-time sliding mode control (DSMC). In the control scheme, two-degree-of-freedom (2-DOF) control strategy turns the DSMC, which ge...
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ISBN:
(纸本)9781479978632
The main objective of this paper is to perform a robust controller design using discrete-time sliding mode control (DSMC). In the control scheme, two-degree-of-freedom (2-DOF) control strategy turns the DSMC, which generally utilized state feedback into output feedback controller. The designed control scheme is considered with feedback and feedforward combination by implementing the zero phase error tracking control (ZPETC), which particularly intended for the nonminimum phase electro-hydraulic actuator (EHA) system application. In the experimental works, a sinusoidal trajectory with different frequencies is employed to assess the DSMC performance under nonlinear and uncertain condition. Experimental results show the DMSC with perfect tracking control approach is capable to reduce the phase lag occurred due to nonlinear phenomenon. The proposed controller also is highly robust under various points of trajectories and significantly shows enhancement in tracking control performance as compared to the conventional controllers.
This article presents a direct expert controller for speed control of DC motor. The DC motor speed control system is selected as the controlled object. The transfer function model and the difference equation model of ...
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This paper focuses on bistability in a class of simplified double-negative feedback loop with positive autoregulations(DNFLPAs). The existence criteria of multiple equilibriums is established and the stability conditi...
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ISBN:
(纸本)9781479947249
This paper focuses on bistability in a class of simplified double-negative feedback loop with positive autoregulations(DNFLPAs). The existence criteria of multiple equilibriums is established and the stability conditions are derived for each equilibrium. The effect of each biochemical parameters on bistability is explained. At last, several numerical simulations are carried out to deepen our analysis.
In wireless sensor networks,this paper puts forward a distributed fault detection algorithm to solve the node failure *** takes into account the spatial correlation of network node,based on the way of weighted distanc...
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ISBN:
(纸本)9781479947249
In wireless sensor networks,this paper puts forward a distributed fault detection algorithm to solve the node failure *** takes into account the spatial correlation of network node,based on the way of weighted distance,compares its own reading with the weighted value to judge the fault ***,the feasibility and effectiveness of the algorithm is demonstrated via computer *** simulation results show that the correct rate of fault detection is improved,and the false alarm rate of fault detection is reduced.
This contribution presents a new methodology for the online identification, which allows the modeling of the stationary and dynamic behavior of nonlinear combustion engines with many input and output variables in shor...
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In this paper, a method to implement the input shaping control in Mechatrolink-III motion system is introduced. Firstly, the underdamped system is theoretically built by modeling. Then, the motion controller of Mechat...
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ISBN:
(纸本)9781479999767
In this paper, a method to implement the input shaping control in Mechatrolink-III motion system is introduced. Firstly, the underdamped system is theoretically built by modeling. Then, the motion controller of Mechatrolink-III network is designed to apply the input shaper for reducing residual vibration in manufacturing machine. Later, the experimental beam is set-up to verify the effective performance of input shaping technique. The validity of the control strategy is practically performed by testing ZV, ZVD and ZVDD input shapers. Especially, the successful implementation provides an opportunity to apply the input shaper for multi-axes since Mechatrolink-III motion controller supports up to 32 axes.
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