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This paper presents "SimPlayGround" - a framework for the stimulative evaluation of reactive and proactive power-management approaches in distributed energy harvesting systems. Our simulation framework combines the simulation of wireless communication, the behavior of reversible power supplies and the dynamics of power consumption. It supports models of the environmental power and energy...
This paper focuses on the tracking problem for a class of nonlinearly parameterized (NLP) system with dead-zone input. The nonlinear functional with unknown parameters being nonlinear form is considered without imposing any conditions on unknown parameters. All the dead-zone parameters are unknown. By constructing a novel Lyapunov functional, a simple and smooth adaptive controller is designed via...
Base on the uncertain interconnected systems with state delay, a decentralized model reference adaptive iterative learning control is proposed in this paper. The proposed controller of each subsystem only relies on local state variables with no any information exchanges with other subsystems. In order to eliminate the effects of interconnections, state delays and uncertainties, the adaptive parameters...
So far, most of the proton exchange membrane fuel cell (PEMFC) models are difficult to apply in the control system design. In this paper, a dynamic control model of PEMFC system is set up. Based on this model, a self-adaptive fuzzy PID controller and a PID controller are respectively used to control the output voltage. The simulation results show that, this adaptive fuzzy PID controller can control...
In this paper, a variable direction rotatable axis variable vector propeller (VDRAVVP) is researched. The structure and working principle of VDRAVVP of AUV are described and the mathematic model of AUV in spatial motion was derived based on momentum theorem. Based on the motion model and combined with three degrees of freedom model of vertical motion, a motion simulation system was constructed. Considering...
In 1989, HIV was detected amongst injecting drug users (IDUs) in Yunnan province. Needle sharing drove the epidemic and HIV spread rapidly to IDUs in neighboring cities and along drug trafficking routes. By 2002, HIV was present amongst IDUs in all mainland Chinese provinces. It is believed that IDUs may have been the core source for all later sub-epidemics in China. Agent-based modeling (ABM) is...
Geomagnetism Aided Navigation (GAN) is one of the most important methods to control the error in the INS. An Adaptive Genetic Algorithm applied in geomagnetic marching is proposed in this paper. By adjusting the Crossover Probability and Mutation Probability adaptively according to the value of fitness function, the AGA prevents the Genetic Algorithm from premature convergence or transforms the GA...
Brushless DC motor speed servo system is multivariable, nonlinear and strong coupling. Its performance is easily influenced by the parameter variation, the cogging torque and the load disturbance. To solve the deficiency, the paper represents the algorithm of active-disturbance rejection control (ADRC) based on back-propagation (BP) neural network. The ADRC is independent of accurate system and its...
This paper proposes new MAC layer based back-off and retransmission strategies for throughput enhancement, in broadcast transmissions of inter vehicular communication. We present adaptive back off strategy which is based on the concept that there exists an optimum contention window (CW) period in a broadcast CSMA/CA system, given the fixed number of users. We also propose a simple probabilistic approach...
This paper presents a nonlinear input-state feedback linearization controller for tracking trajectory on horizontal plane with the rudder of an unmanned underwater vehicle (UUV). UUV system is strongly nonlinear, but the model is often simplified into linearization under some strict assumptions in some traditional linear control methods for the need of the control laws, and the linearization may induce...
Adaptive optics system is the necessary facility for the large telescope in order to obtain the clear image. Due to the complexity and cost, the simulation of adaptive optics is important. In the paper, a simulation platform is built up, which includes the wavefront sensor, deformable mirror, tip/tilt mirror and a controller with a reconstructor. Based on the platform, an adaptive optics system potentially...
Background: During the first large outbreak of avian influenza (H5N1) in 2004 in Vietnam, an estimated 45 million poultry were culled or died, which resulted in a direct loss of approximately 0.1 percentage points of GDP (World Bank, 2005). The need for an effective strategy is not only the concern of biology and medical science but also of epidemiology. Methodology: We use a mathematical model to...
Due to the explosive growth in ubiquitous multimedia access, one needs to adapt the considerable number of pre-encoded video content to a wide variety of user constraints such as different resolution, bitrate, frame rate, processing power and platform. Current adaptation frameworks do not take the encoder into account. In other words the encoder optimizes its outcome for the base layer only, regardless...
Fuzzy control technology is applied to design a two-input and three-Output-fuzzy PID controller to control the vehicle semi-active suspension system makes a comparative analysis with common PID controller. The simulation result indicated that, fuzzy PID controller in the improvement controlled process's tendency and the stable state performance, sharpens aspects and so on anti-interference ability...
Accurate modeling and simulation of submersible vehicle is essential for autonomous control and maneuverability research. In this paper, a variable direction rotatable axis of variable vector propeller (VDRA-VVP) is proposed and researched innovatively. The structure and working principle of VDRA-VVP of submersible vehicle are described and the nonlinear mathematic model of the submersible vehicle...
In this paper the modeling and simulation of a class of discrete-time stochastic bilinear systems are studied, the extended least squares (ELS) algorithm are used to estimate unknown parameters of the system, and two simulation examples show that the ELS algorithms of the modeling and simulation are effective for discrete-time stochastic bilinear systems with correlated noises and unknown parameters...
As sensor networks are finding widespread use across many applications, designers increasingly must not only focus on application development, but also on sensor network optimizations. Given the complexities of sensor networks and the difficulty of analyzing the long-term effects of design changes within a deployed system, simulation is often the only feasible option for evaluating such optimizations...
In order to built Active-Disturbance-Rejection-Controller (ADRC) simulation models quickly and easily in MATLAB / SIMULINK, a user-defined ADRC Block library is created by the way of developing MATLAB function files for special nonlinear functions, designing system functions (S_function) for dynamic algorithms such as Tracking-Differentiator (TD) and Extended State Observer(ESO), then masking some...
Applications like stock markets, embedded systems and telecommunications are becoming more demanding real-time database management systems. Research in the area of real-time databases leads to the development of sophisticated control algorithms and for testing these in different configurations we need a simulator framework that allows us to see how they behave for different transaction workloads....
This paper presents a novel speed & position estimation algorithm for the PMSG based wind turbine using Adaptive Network-Based Fuzzy Inference System (ANFIS). The precise information of rotor speed and position is required to perform maximum power tracking in variable speed wind turbine, which is very difficult to estimate under varying operating conditions, as it may lead to parameter variation...
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