Recent studies have shown that permanent magnet synchronous motor (PMSM) is a highly nonlinear system, and can exhibit chaotic behaviors when its systemic parameters fall into a certain area which severely threatens t...
详细信息
SRD has better application in future. We used SRD into hybrid electric vehicle and study integration of starting, running, steering and charging. A 6/4 SRD simulation model can be built by Matlab/Simulink. The charact...
详细信息
SRD has better application in future. We used SRD into hybrid electric vehicle and study integration of starting, running, steering and charging. A 6/4 SRD simulation model can be built by Matlab/Simulink. The characteristics of all stages of the vehicle are described well from this model and also proved the possibility of the control method.
Taking into consideration that distribution static synchronous compensator (DSTATCOM) of fast response is an effective method to improve power quality in distribution system;based on active disturbance rejection contr...
详细信息
Taking into consideration that distribution static synchronous compensator (DSTATCOM) of fast response is an effective method to improve power quality in distribution system;based on active disturbance rejection control technique, this paper presents a new control strategy for cascade multilevel DSTATCOM. Aiming at this system's characteristic of strong coupling, linear extended states observer (LESO) in linear auto-disturbance rejection controller (LADRC) was used to estimate the real-time action of the internal (including model's uncertainties and coupling terms) and external disturbance and render it, realizing the ADRC of d, q axis current decoupling. Results from simulation and experiment prove that compared with traditional PID control, LADRC is of better rapidity and robustness in the meantime of decoupling control.
The control strategy of grid-connected inverter has always been a core question of generating systems. This paper analyzed three kinds of ways pf inverter's output current based on the current control mode. Those ...
详细信息
ISBN:
(纸本)9781467323635
The control strategy of grid-connected inverter has always been a core question of generating systems. This paper analyzed three kinds of ways pf inverter's output current based on the current control mode. Those are current hysteretic comparison control method, timing control of current instantaneous comparison method and the triangle wave comparison control method of timing tracking current. And all of three were simulated by MATLAB/Simulink. It turned out to be that the three methods for grid-connected inverter have good grid effect. Each of them has their advantages and disadvantages in grid control strategy. All of them will provide theoretical basis for further research.
Focusing on solving the problem that the traditional super-loops can not meet the requirement of Modern controlsystems no matter on resource management and system control, this paper introduces a way to construct an ...
详细信息
Profibus-DP fieldbus has been the research focus in the field of industrial automation and control, and there're kinds of relevant *** slave station, one of the products used in connecting the master station and t...
详细信息
Profibus-DP fieldbus has been the research focus in the field of industrial automation and control, and there're kinds of relevant *** slave station, one of the products used in connecting the master station and the industrial units like frequency converter, sensor and meter and so on, is the key technology now researched.A design of Profibus-DP slave station based on DPRAM is proposed in this ***, a overall design of hardware for the slave station is ***, the design for the core module of the slave station and the user interface are mainly *** the end, the design of the software for the slave station is proposed, and the connection between the industrial units and the Profibus-DP master station is realized.
Based on finite element theory, using FLUENT software and three-dimensional model to simulate liquid metal free surface and temperature field of casting filling process numerically. Boundary and initial conditions, su...
详细信息
Based on finite element theory, using FLUENT software and three-dimensional model to simulate liquid metal free surface and temperature field of casting filling process numerically. Boundary and initial conditions, such as velocity, pressure, temperature, etc., was reasonably set. The feasibility of using FLUENT to simulate three-dimensional casting was studied; the fluctuation of molten metal free surface was observed; the temperature distribution data on the end of filling was recorded, for further numerical simulation of casting solidification process which provided an accurate initial condition. This paper also predicted defects on casting filling process, and provided a basis for process optimization.
The main purpose of the Joint Detection (JD) techniques is an accurately estimating the user's signal, the difficulty lies in the system matrix inversion, so to find the fast inversion algorithms is the main key t...
详细信息
The data transmission on CAN bus is decided by priority, That is the data with high priority can always be transmited by inturrupt the data transmission with low priority In that case the data with lower priority may ...
详细信息
ISBN:
(纸本)9783037851555
The data transmission on CAN bus is decided by priority, That is the data with high priority can always be transmited by inturrupt the data transmission with low priority In that case the data with lower priority may not be transmitted for a long time. To sove such problem we use DRR scheduling algorithm,But in the case of too many unexpected data,The scheduling results are poor In view of such situation this paper put forward a solution allocation quotas dynamicly according to the current network state. And setting up a CAN bus system simulation platform in which conducted a simuliation experiment. The result show that the improvement strategy work well at any situation.
Recent investigations show that a power system is a highly nonlinear system and can exhibit chaotic behaviour leading to a voltage collapse, which severely threatens the secure and stable operation of the power system...
详细信息
Recent investigations show that a power system is a highly nonlinear system and can exhibit chaotic behaviour leading to a voltage collapse, which severely threatens the secure and stable operation of the power system. Based on the finite-time stability theory, two control strategies are presented to achieve finite-time chaos control. In addition, the problem of how to stabilize an unstable nonzero equilibrium point in a finite time is solved by coordinate transformation for the first time. Numerical simulations are presented to demonstrate the effectiveness and the robustness of the proposed scheme. The research in this paper may help to maintain the secure operation of power systems.
暂无评论