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A new synchronization control scheme is proposed for Lorenz system. In order to obtain global stability, a state-depended dynamical error equation for the coupled systems is addressed. The control problem is converted into matrix inequalities by choosing proper control parameters. Additional optimization is given to reduce control parameters. Finally, the control problem is numerically solved by BMI...
The real-time monitoring of operational status in coal face can reduce the occurrence of risk effectively and prevent the further expansion of risk. This paper introduces a PC software in hydraulic supports control system based on VC++ through the investigation of coal face and the mathematical model of electric hydraulic and powered support control system. VC++ 6.0 was used to be the platform in...
In the paper, new results on H∞ control of impulsive systems with quantized feedback are presented. Applying the Lyapunov function theory, several sufficient conditions of the H∞ control problems are established for several classes of impulsive systems including linear uncertain impulsive system, linear impulsive system with nonlinear uncertainties, and impulsive system with decaying exponential,...
Several control functions of hydraulic supports are realized through designing of hardware and software in this paper. Directed towards response lagging and security that they may appear in this system, theoretically analysis and calculation are conducted in this paper. Then methods for improving response speed and safety performance of system are raised. Finally, system functions and stability are...
For the sake of overcoming the shortcoming of the wired system such as complex wiring and low anti-interference capacity, a wireless measurement and control system for greenhouse is developed based on Zigbee, which is composed of upper monitor control PC, wireless gateway CC2430, sensor node CC2430 and sensor module. The star network topology is adopted on the basis of studying the characteristic...
This paper presents a method to determine the admissible set of controller parameters when the H-infinite norm of the mixed sensitivity is taken as the objective function for the PID controller design. First the mixed sensitivity requirement can be translated into the stabilization problem of a family of complex polynomials as well as the close-loop characteristic polynomial. Then by stabilizing these...
For UPQC, its series compensator and parallel compensator can be regarded as two dc voltage inverter. Therefore, maintaining a constant value for dc voltage is necessary for UPQC to performance normally. The constant dc voltage is related to the power balance between UPQC and sources, namely when the input active power of UPQC is equivalent to its consumption theoretically. So the controlling of dc...
In view of the controlled plant complexity of the horizontal position synchronization system in automatic filling machine, a novel approach of single neuron PID model reference adaptive control for AC permanent magnet synchronous motor (PMSM) servo control based on diagonal recurrent neural network (DRNN) on-line identification is proposed owing to the disadvantage of traditional PID controller. The...
This paper designed a double close loop control system based on current and voltage. As the system instable in some cases, the traditional PI regulator can not regulate the system more precisely. To make a more stable and better control effect, it should be improved by using Neural Network Control to get a feedback adaptive control system of PWM rectifier in order to achieve better results.
The main circuit of UHVDC transmission system in China is introduced. Based on the ABB HVDC control protection system, the principle and method of the interface technology between the PSCAD/EMTDC and HIDRAW are introduced. An off-line real-time simulation system using PSCAD/EMTDC is built for UHVDC transmission system which is used for protection testing. With a practical project, various of the protection...
The coupling relations of all variables during fermentation process with fermentation are discussed. Since the parameters are always changing as time-varying, nonlinearity and randomicity during biology fermentation control process. the scheme for biology fermentation control process using feed forward decoupling intelligent algorithm for multivariable based on FNN is presented. Fuzzy-Neural controller...
This article firstly describes the principle of control strategy and puts forward a torque-balancing control strategy for the hybrid electric public bus. Based on the designed control strategies, the simulations are carried out and the results are analyzed under different conditions, and the torque-balancing control strategy was improved on the basis of the efficiency-first ideas of the hybrid system...
Based on AT89S52 MCU designed a blind people e-reader. Details are given in the e-reader hardware and software design. This blind e-reader can convert any Chinese or English document in the computer into corresponding Braille code available to the blind, tactile, can also enter from the keyboard and display, can achieve the recording and music player function, the system easy to operate, low-cost,...
With studying hardware-in-the-loop simulation system of infrared controlling and guiding, system identification is adopted to analysis the error of simulation equipments. An appropriate identification method is studied to equipment modeling. An identification experiment is designed, including the selected signal which is used for identification, and data pretreatment. With the result identified, Differences...
This paper presents a digital controlled distributed converter system with a switched-mode boost type PWM rectifier and several bidirectional buck/boost dc/dc converters for battery charge and discharge system using digital signal controller (DSC). The rectifier can implement bidirectional power flow, sinusoidal current control and unit power factor in grid side. The system is able to control power...
Dispatching centers are regarded as the heart of the integrated network both in generation and transmission network and play an important role in safe and stable operation and also have a great importance observing economical usages. Basically stepwise dispatching system is corresponding to electrical network structures and the ministry of power management methods, and also has to be more flexible...
The development of nuclear power is the general trend and popular feeling. Because of the existence of radioactivity, underwater welding has become one of the important safeguard for nuclear power station. The key technologies and the test system were developed, the test cabin system and the test environment system can simulate the test water environment well. The control system can guarantee every...
This paper presents a optimal control and allocation strategy for Internal combustion-Linear Generator integrated Power System (ICLGIPS), the main objective of the strategy is to improve efficiency of the system. Linear generator (LEG) works alternately as electromotor and generator during one work period, energy storage device converts and transfers energy between power source and LEG, energy conversion...
With the widespread use of harmonic-generating devices, the control of harmonic currents to maintain a high level of power quality is becoming increasingly important. An effective way for harmonic suppression is the harmonic compensation by using active power filter. This paper presents a comprehensive survey of active power filter (APF) control strategies put forward recently. It is aimed at providing...
This paper describes a fast algorithm for space vector modulation (SVM) in Three-phase pulse width modulation (PWM) rectifier. The objective of Space Vector PWM technique is to approximate a given reference voltage vector Uref by combination of the switching pattern corresponding to the basic space vectors, without looking up sinusoidal and tangential tables. With the fast algorithm, the running speed...
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