This paper presents an imaging method for 360-degree panoramic view based on four wide angle cameras. In order to complete the image mosaic, all the parameters such as focal length, principal point and distortion coef...
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This paper deals with the problem of output feedback control of SISO nonlinear systems based on the multi-dimensional Taylor network (MTN) controller. It adopts the MTN controller as a network structure controller and...
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ISBN:
(纸本)9781479999767
This paper deals with the problem of output feedback control of SISO nonlinear systems based on the multi-dimensional Taylor network (MTN) controller. It adopts the MTN controller as a network structure controller and the differential geometry as an analysis tool. It proves that, when the given conditions are met, the reference signal can be asymptotically tracked by the MTN controller. And also, it proves the MTN controller can realize the closed-loop system dynamic regulation. Finally, an example is given to prove the correctness of above.
This paper investigates the robust second-order tracking problem of multi-agent systems without velocity measurements on detailed balanced directed communication topologies,where agents' dynamics are subject to un...
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This paper investigates the robust second-order tracking problem of multi-agent systems without velocity measurements on detailed balanced directed communication topologies,where agents' dynamics are subject to uncertain and external *** first construct the controller for multi-agent systems without uncertain and external ***,combined with the controller,one modifying uncertainty and disturbance estimator(UDE) is proposed to approximate the situation where neither the velocity measurements nor its asymptotic estimation is *** is shown that the synchronization errors are bounded and their ultimate bounds could be arbitrarily small by choosing some parameters *** results are presented to show the effectiveness of the controllers.
In order to overcome the drawbacks of Global Artificial Fish Swarm Algorithm（GAFSA）,such as slow convergence,low precision,difficult to give the initial step,a lot of invalid calculation and so on,a modified GAFSA（...
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ISBN:
(纸本)9781479970186
In order to overcome the drawbacks of Global Artificial Fish Swarm Algorithm（GAFSA）,such as slow convergence,low precision,difficult to give the initial step,a lot of invalid calculation and so on,a modified GAFSA（ADPSAFSA） is *** to the convergence condition,ADPSAFSA can adjust the step length and other parameters automatically to improve the performance of the *** adaptive chaos search is also used to improve the optimization *** strategy of randomly search in large scale and chaotic search in small scale is also *** the convergence turned to the optimal value,the convergence rate becomes low,thus some condition is meet,the step of GAFSA will be expanded or shrank,and the process repeats until the step down to the set *** computing results of some international standard test functions show that the accuracy and the convergence speed of this method is improved indeed.
This paper investigates a nonlinear disturbance observer(NDOB) based sliding mode control(SMC) approach for PWM-based DC-DC boost converter systems subject to resistance load disturbances and input voltage *** designi...
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This paper investigates a nonlinear disturbance observer(NDOB) based sliding mode control(SMC) approach for PWM-based DC-DC boost converter systems subject to resistance load disturbances and input voltage *** designing a novel sliding mode manifold incorporated with a disturbance estimation technique,a NDOB-based SMC method is designed for these systems.A rigorous stability analysis is *** compared with the nominal SMC method,the proposed method obtains a better disturbance rejection ability when the resistance load and input voltage are *** comparison results are provided to verify the effectiveness of the proposed control method.
In this paper,the finite-time state observer design problem for a pneumatic servo system is *** the case of without velocity sensors,a velocity observer is *** rigorous stability analysis,it is proved that the designe...
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ISBN:
(纸本)9781479970186
In this paper,the finite-time state observer design problem for a pneumatic servo system is *** the case of without velocity sensors,a velocity observer is *** rigorous stability analysis,it is proved that the designed observer is locally finite-time *** on the proposed observer,an output feedback linearization controller is proposed for position tracking control of the pneumatic servo *** simulations illustrate the effectiveness of the proposed velocity observer.
This paper combines the dynamically adjusting parameters, the chaos search（CS）, and the modified simplex method（MS） with GAFSA, and the CSSAFSA is proposed. The algorithm speeds up the convergence by dynamically a...
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This paper combines the dynamically adjusting parameters, the chaos search（CS）, and the modified simplex method（MS） with GAFSA, and the CSSAFSA is proposed. The algorithm speeds up the convergence by dynamically adjusting the parameters, and increases the probability of artificial fish escaping local extreme points by chaotic search for the current global optimum value. When the algorithm converges to the global optimum nearby, a simplex is constructed and the algorithm switches to MS which will continue to optimize until a certain stop condition is satisfied. Take the best point of simplex vertex at this time as the optimal value. The computational results on benchmark functions show that CSSAFSA does improve in optimizing accuracy and convergence speed.
When traditional electro-hydraulic proportional valve or servo valve controlled systems are used to drive unbalanced external load, the hydraulic valve itself exists throttling losses. At the same time, the excess kin...
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ISBN:
(纸本)9781467371902
When traditional electro-hydraulic proportional valve or servo valve controlled systems are used to drive unbalanced external load, the hydraulic valve itself exists throttling losses. At the same time, the excess kinetic or potential energy of external load is consumed in the form of heat. In order to reduce energy loss and recycle external load energy, this paper puts forward a kind of electro-hydraulic control equipment which can recycle energy. It consists of directional valve, hydraulic motor, generator, power transformation device. In details, the directional valve is used to control the fluid direction of hydraulic actuator, hydraulic motor is connected to the fluid return channel of the directional valve. A generator is connected to hydraulic motor so that the back pressure of the actuator can be controlled by adjusting the torque applied on the hydraulic motor. In this way, the trajectory of the actuator is controlled. The mechanical energy applied on the hydraulic motor can be converted to electricity via the power conversion device, and then transmitted back to the grid. The simulation and experiment results prove that the proposed scheme is feasible.
research the effect of dirt of quartz wafer on its electrical parameters. Experimental and theoretical analysis results show that the dirt of quartz wafer affects its mass, elastic modulus and vibration damping, and l...
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research the effect of dirt of quartz wafer on its electrical parameters. Experimental and theoretical analysis results show that the dirt of quartz wafer affects its mass, elastic modulus and vibration damping, and leads to increase of dynamic inductance, decrease of dynamic capacitance, reduction of resonant frequency and increase of resonance resistance. Effect of the dirt on the electrical parameters of quartz wafer is related to not only its magnitude, but also its location, materials and other *** study on quartz wafer appearance defects for improving the quartz wafer automatic sorting technology in our country and setting up the unified and objective testing standards of quartz wafer has important significance.
This paper proposes adaptive fuzzy PD+ based controller for the attitude maneuver of rigid spacecraft. Based on the error of the system, the adaptive fuzzy PD+ based controller applies adaptive fuzzy algorithm to modi...
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