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Aiming at the simulation for the prime mover supplied by thyristor, the principle and the fundamental methods to dynamically simulate the self-balancing characteristics of a turbine are studied in this paper. A new scheme is presented to simulate the characteristics of the prime mover when the generator simulator operates in various conditions. Nonlinear control components are adopted to solve long-existing...
Electric vehicles (EVs) becomes popular for energy saving and environmental protection in light of sustainable development in recent years. The wide spread popularity of EVs relies on an effective strategy for charging the battery. Hence, efficient and robust algorithms are essential for implementing the charging strategies. In this paper, an intelligent scatter search (ISS) framework utilizing filter-SQP...
Aiming at the simulation for the prime mover supplied by thyristor, the principle and the fundamental methods to dynamically simulate the self-balancing characteristics of a turbine are studied in this paper. A new scheme is presented to simulate the characteristics of the prime mover when the generator simulator operates in various conditions. Nonlinear control components are adopted to solve long-existing...
Electromagnetic scattering from conducting combination target of body of revolution (BoR) and arbitrary structure is analyzed using the integral equation domain decomposition method (IE-DDM). In non-conformal IE-DDM framework, the target is divided into the BoR sub-domain and non-BoR sub-domain according to geometrical feature, where the BoR and RWG basis functions are used respectively. To realize...
This paper presents a new adaptive nonlinear control for trajectory tracking of non-affine nonlinear systems. The referred proposed controller which is based on a L2 norm prescribed to minimize a trajectory tracking error has adaptive and optimal characters. Moreover with the systems output feedback, the proposed controller which dose not require any knowledge of nonlinear internal dynamics can be...
The control systems typically use the conventional PID (Proportional, Integral, Derivative) controller to control the direct current (DC) voltage [1]. The obtained control results are relatively well when PID controller is applied, but the design parameters are not absolutely precise and sensitive to the changes of system parameters. The PID controller is used to control the frequency of three-phase...
An improved PID sliding mode control strategy with constant switching frequency for the voltage regulator of doubly salient electro-magnetic generator has been proposed in this paper. Next, operating principle of controller was described in detail and the stable condition of the system was deduced by Lyapunov function based on mathematical model and working principle of generator. Considering improved...
A novel direct torque control based on terminal sliding mode controller for doubly salient electro-magnetic machine was proposed in this paper. The mathematical model of the motor has been constructed and generation principle of torque ripple was analyzed. Based on analysis of torque ripple, phase current waveforms had been optimized to reduce the electro-magnetic torque ripple by using direct torque...
Cooperative positioning is a new paradigm in Global Navigation Satellite System (GNSS) positioning. By sharing information with other users and measuring geometrical range between them, the localizability and positioning precision of users can be improved. In this paper, we put forward a two user cooperative positioning model and a positioning algorithm. This paper analyzes the localizability of users...
Distributed computation and storage have been widely used for processing of big data sets. For many big data problems, with the size of data growing rapidly, the distribution of computing tasks and related data can affect the performance of the computing system greatly. In this paper, a distributed computing framework is presented for high performance computing of All-to-All Comparison Problems. A...
This paper proposes an on-line maximum efficiency control method for a dual-motor drive system. By using the on-line feedback signals and doing simple computations, the output torque of each motor can be determined. Then, a maximum efficiency operation of the whole system can be achieved. The efficiency of the whole system, which includes motor efficiency and inverter efficiency, is investigated....
This paper proposes an improved sensorless matrix-converter IPMSM drive system using a high frequency injection method. By suitably choosing different virtual dc-bus voltages and compensating the duty cycle of the switching states, the estimated position error can be obviously reduced. A 32-bit digital signal processor, TMS-320LF-2407A, is used to execute the rotor position estimation and the whole...
Applying the selective harmonic elimination (SHE) technique to grid connected cascaded modular multilevel inverters has been widely discussed in literature. However, due to the difficulties of solving high-order non-linear transcendental equations, the SHE technique cannot be implemented in real time so its applications are limited. This paper presents a technique to convert the non-linear equations...
A nonsingular terminal sliding mode control strategy with constant switching frequency for the voltage regulator of doubly salient electro-magnetic generator has been proposed in this paper. Next, operating principle for the terminal sliding mode controller was described in detail and the stable condition of the system was deduced by Lyapunov function based on mathematical model and working principle...
The voltage variation caused by increasing renewable energy generation can be attenuated effectively by using Battery energy storage system (BESS). Firstly, the widely used PNGV method is adopted to build the battery cells model in this paper. Then, the identification methods of electrochemistry battery's electrical equivalent circuit are introduced according to ‘continuous function analytic expression’...
According to the uncertainty of road condition and electricity demands of heavy-duty vehicles with Electro-mechanical Transmission in driving processes, a Markov model regarding driver's power demands is built and an optimal power control strategy based on stochastic dynamic programming (SDP) is proposed, establishing power balance dynamic models of engine, motor/generator and batteries. For the optimal...
This paper establishes a packaging module of multichip with lead-free solder ball SAC305. BGA solder ball adopt nonlinear Anand viscoplasticity constitute formula. With the change factor of five screw locations, the dangerous solder ball position and stress-strain hysteresis curve are obtained through simulation with applying thermal cycling condition and screw prestress under the IPC9701 standard...
IP traceback to the origin of denial of service (DoS) attack is extremely hard and most existing methods such as marking and logging based approaches are not practical and need changes in infrastructure. The flow-based IP traceback is a new approach which can use the advantages of metaheuristic algorithms. In this paper, a bee colony algorithm is applied to find the DoS attack source. The traffic...
Most of the coal mine monitoring and control systems are the gas alarm device for the gas, this type of monitoring and control system can only monitor downhole gas, but it can't provide the visual condition of downhole to the ground monitoring person. To get the visible light image and infrared image, we research the target feature extraction technology of multi-source image. On the basis, we use...
This paper focuses on an internal model tracking control problem of an uncertain impulsive switched system. The contribution of this study is to develop an internal model tracking control law integrated with the guaranteed cost control algorithm for uncertain impulsive switched systems. Firstly, an uncertain impulsive switched system with guaranteed cost control is stated and some important theorems...
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