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In this study, a new fundamental modeling framework for coupling the solid and fluid fields is proposed with which the system dynamics are generated with respect to the internal energetic interactions between the system existing physical domains. To this aim, the physical-decomposition modeling techniques, developed respectively for the solid [1] and fluid [2] fields, are implemented. By considering...
The technology of Bank-to-Turn is an important development direction of hypersonic glide vehicles' control. But there is a strong coupling between roll channel and yaw channel when the vehicle is in rolling maneuver. In this paper, a dual decoupling fusion control method is presented based on aileron-rudder cross decoupling control and model reference global sliding mode control for the problem of...
In this paper, a fuzzy tracking control strategy for a quad-rotor unmanned aerial vehicle (UAV) with strongly coupling is put forward based on the Takagi-Sugeno(T — S) fuzzy error model. Firstly, The quad-rotor system is divided into altitude subsystem, position subsystem and attitude subsystem, selecting appropriate premise variables, the attitude, altitude and position T — S fuzzy error models are...
The structure of quadrotor with suspended load is widely used in many fields such as military and civilian. A wide range of research in this structure was implemented and have achieved a variety of results. With the deeper of research, many problems are urged to be solved under the concern of security. For example, the oscillation degree of the suspended load. At first, this paper proposed a nonlinear...
In this paper, we investigate how additive noise, e.g. thermomechanical noise, impacts the resolution of mode-localized resonant sensing architectures based on two weakly-coupled resonators. Existing work suggests that the resolution of these sensors can be improved by decreasing the coupling coefficient of the resonators. The present work gives an analytical proof that this result does not hold when...
The nonlinear characteristics of SAW resonators have been of great interest recently. We present a new nonlinear solution algorithm for the f-2f nonlinear coupling phenomenon in SAW IDT resonators. Specifically we have applied our algorithm to obtain the f-2f frequency response of the lithium niobate YX-127o SAW IDT resonators. Lithium niobate was chosen because a complete set of its nonlinear material...
An apodization method is illustrated in this work to enable displacement and strain energy confinement at the central section of the composite thin Film Bulk Acoustic wave Resonator (c-FBAR) while in operation at the resonance mode. The device is excited at a higher order thickness extensional mode. The proposed resonator is designed in sinc shape to attain high degree of energy localization. Here,...
We investigate the mode propagation and coupling in multimode fibers, based on modeling the wave propagation through the coupled power equation. Using this model, the power evolution of the various propagating modes in fibers can be visualized and the impact of mode-dependent loss and mode coupling can be quantitatively analyzed.
Recent work on granular computing has introduced new notions which apply to research network structure. In this paper, we present a study of a multiple level of granularity for network. The first problem is how to model the multiple level network based on granular structure. We then propose a method of constructing a multiple level network. Compared with flooded searching path network, the proposed...
To describe neuronal population spiking patterns, a neuronal spiking small-world network model of the hippocampus CA3 area is studied. Each network contains 100 excitatory neurons and 20 inhibitory neurons. The excitatory neurons and inhibitory neurons are set by parameters shifting of Izhikevich single neuron model. Multi spike trains data are obtained with different coupling strengths and reconnection...
We report on numerical analysis of opto-mechanical (OM) cavities, with a full description of the rigorous numerical scheme involved, with emphasis on the mechanical stress induced by EM fields. In the future, OM structures are likely to be integrated in planar technology as pumped phonon sources and detectors, as well as phonon processing components (waveguides, splitters, memories) to process information...
This paper studies the modeling and control of a quadrotor with a suspended load. It is shown that the excessive load swing is the part of the system dynamics, which may degrade the quadrotor control performance. A detailed analysis about the system modeling with the load swing effect is carried out based on Newton-Euler and Euler-Lagrange method. A framework for sliding mode control of the quadrotor...
This paper presents the stabilization of a relative equilibrium of an underactuated autonomous underwater vehicle(AUV) with three independent control inputs: moment of pitch, moment of yaw and thrust, in three-dimensional space. The dynamics of an AUV can be described by the Kirchhoff's equations which couples actuated variables and underactuated variables together and which is helpful to control...
Cross-axis coupling is an important motion error source of parallel mechanism. This issue poses a challenge on large range XY compliant nanomanipulating systems to achieve the desired motion quality. In this work, the repetitive controller is utilized to track periodic inputs. Also the cross-axis coupling of the XY parallel mechanism is treated as an equivalent disturbance in each axis, and the equivalent...
The synchronization problem is concerned for a complex network with inner-coupling faults. Firstly, the model of this kind of complex network is established where the inner-coupling faults are presented by a sequence of fault factors. Then the synchronization criteria are derived based on the Lyapunov stability theory and master stability equation method in the form of linear matrix inequalities....
The engine start-stop technology has been widely concerned in the field of hybrid electric vehicles (HEV) for improving the fuel economy and alleviating environment pollution. In this paper, the model predictive control (MPC) is applied to deal with the control problem of engine start-stop with input constraint. Firstly, a nonlinear engine-BSA (belted starter alternator) coupling model is introduced...
For multivariable coupling systems with large time delay, a feed-forward decoupling control algorithm is proposed based on the generalized predictive control (GPC). Similar with feed-forward control former, the coupling effect from other control channels is handled as strong disturbance. The related coupling matrix λ and R in GPC algorithm are decomposed and proper parameters are chosen to realize...
The motion control of autonomous underwater vehicle (AUV) system is a very challenging issue because of the high nonlinearity, strong coupling and time-varying property. A novel polynomial fuzzy model based (PFMB) output feedback controller is proposed in this paper, which enables the AUV to achieve the desired depth quickly and stably. Specifically, a polynomial fuzzy model of AUV is constructed...
We model the situation of two lasers in a face to face arrangement, passing through an attenuating element, where the time of flight between the lasers is on the scale typical in photonic integration (100's of μm to mm's). A modified version of the Lang-Kobayashi equations was employed to describe the interaction. By solving this delay differential equation (DDE) system we characterised different...
In this paper, the adaptive synchronization transmission of target signal within the nonlinearly unidirectional-coupled neural network is proposed, in which individual neuron is described by the FitzHugh-Nagumo (FHN) model in external electrical noisy environment. We design a network architecture of the unidirectional-coupled FHN system and propose an adaptive coupling strategy to synchronize the...
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