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Among numerous seawater treatment methods, electrolysis belongs to a relatively ideal method with good treatment effect. Basically, it can reach the standards of safe, effective, economical and environment-friendly. The control circuit part design of ballast seawater treatment system based on electrolysis is finished in this paper. This system takes a MCU as its control core, synchronous circuit module...
Sliding mode control had been designed for robot manipulators at presents popularly, but the chattering is also a primary factor which infected the precise of the trace tracking of robot manipulators. This paper proposed a sliding mode control combined with a low-pass filter to deduce the influence by chattering and increase the precise of the trace tracking of robot manipulators. The stability and...
A new kind of salinity controller of seawater desalination is presented. The calibration and circuit of the sensor are mainly discussed. Circuit design mainly introduced the analog circuit. Parameter calibration introduced the application of binary algebra interpolation method. Finally an improved method for raising measure accuracy is put forward.
The capacity and feature of a large-sized low-voltage switchgear laboratory are presented in this paper. A monitoring and control system is designed for the laboratory with industrial PC as upper computer and PLC as lower computer. The testing process and programming philosophy of switchgear testing are discussed in detail. WinCC configuration software with a human-machine interface (HMI) is used...
Two or more vacuum interrupters in parallel is one mode to increase the rated current capacity of vacuum circuit breaker (VCB). Because of technique restriction, traditional method is that all vacuum interrupters get the open or close order and the short-circuit arc quenching moment of paralleled breaks is different. But because the arcing time of vacuum interrupters is different, the breaking capacity...
Accurate knowledge of the high frequency inductance profile plays an important role in many designs of sensorless controllers for surface inductance. A special algorithm is used to decouple the cross-coupling effects between the d-axis and the q-axis, which allows mounted permanent magnet (SMPM) synchronous motors. This paper presents an AC+DC measurement method for determination of the d-axis and...
To minimize the ripples of the torque and flux linkage and to fix the variable switching frequency produced in the conventional direct torque control (DTC) system for permanent magnet synchronous motors (PMSM), the fuzzy controller was introduced into the PMSM DTC, and a PMSM Fuzzy DTC system based on DSP TMS320LF2407 was implemented. Experimental results show that the proposed Fuzzy DTC system has...
A dynamic model of back-to-back voltage source converter under synchronous rotating d-q coordinate system is developed. The system is transformed to a new equivalent nonlinear system which consists of a linear decoupled subsystem and a nonlinear subsystem characterizing the dynamics of the DC-link voltage in terms of the state variables in the linear subsystem via the feedback linearization technique...
The wind turbine codes predict wind turbine loads and response in high accuracy and can be used in controller design with the development of the computer technologies. In this paper open source FAST code developed by NREL is studied. The wind turbine controller is designed in the Matlab/Simulink environment and the FAST code is modeled as an S-function. The simulation of the control algorithms with...
A simplified predictive current controller for the three-phase bidirectional voltage source PWM rectifier is proposed. Firstly, the mathematic model in synchronous d-q coordinate is founded in the discrete-time domain. Then the simplified predictive current controller with state feedback decoupling is designed and analyzed. To overcome the drawbacks of the conventional predictive current controller...
A robotic platform for spraying in fields was used to demonstrate control problem for autonomous vehicle in agriculture. The approach presented here is a simple and effective solution for the path tracking problem of a 4-Wheel Differentially Steered (4WDS) vision mobile robot using a fuzzy-PID controller. The proposed control strategy uses a simple method to avoid motion interference among the four...
This paper proposes an input-paralleled output-paralleled half-bridge converter based on single half-bridge converter, which is very suitable for the low output voltage and large output current application. All modules share a common capacitor-leg, that can reduce the number of main circuitpsilas capacitors and make topology simple. The traits and rules of combination converter are introduced and...
The repetitive control technology is a high cost-performance waveform control technology widely used in the control of inverter. Compensator as the key parts of repetitive controller is usually adopted as the combination of notch filter with second-order filter. The process of designing and debugging of the repetitive controller, which needs more experiences, is very tedious. In this paper, FIR (finite...
In this paper introduced a design of the active controllable energy feedback device (ACEFD) based on dsPIC30F DSP and d-q controller. Through establishing the synchronous rotating coordinate system (dq) model, we may achieve the decoupling feed-forward control method; the advantages are discussed in the following paragraphs. We also analysis the inner current control model and calculate accurately...
A nonlinear adaptive robust speed tracking controller is presented for a three-phase synchronous reluctance motor (SynRm) considering the control strategy of maximum torque control (MTC) related to this motor. Ignoring the motor iron losses, the proposed controller is designed based on combination of input-output feedback linearization (IOFL) control and adaptive sliding mode technique. The proposed...
Adaptive front lighting system(AFS) is most advanced vehicle lighting system, which can greatly reduce driverpsilas fatigue degree when driving on curve road at night, make driver clearly see actual road surface at turn around, make driver have abundant time to deal with emergency, and evidently promote safety at night. Most high class vehicles have been fixed AFS in Japan, meanwhile AFS will be used...
The variable speed constant frequency (VSCF) wind power generation system requires the DFIG with characteristics of high response speed as well as strong robustness. Under the mutual effects of internal interference of parametric variation and external interference of load torque oscillation, the dynamic current response of PI control becomes worse, as well as reduced efficiency and stability. Aiming...
This paper provides the ingredients for an architectural discussion concerning industrial contactless pick-and-place (P&P) multiple robot design, which incorporates a direct-drive linear permanent magnet motor for the long-stroke movement in a multiple robot component mounter machine. Especially, direct-drive linear permanent magnet motor selection, contactless data and energy transfer and thermodynamics...
To real time detect the positive sequence of fundamental waveform is key technologies for power quality compensating mechanism. The three-phase positive sequence detecting method without phase lock loop (PLL) based on the dq0 coordinate transformation was put forward in this paper. To design control system of series voltage compensating mechanism with the method, the equipment can well achieve wave...
A nonlinear adaptive robust speed tracking controller is presented for a three-phase surface permanent magnet synchronous motor (SPSMS) considering the control strategy of maximum torque control (MTC) related to this motor. Ignoring the motor iron losses, the proposed controller is designed based on combination of input-output feedback linearization (IOFL) control and adaptive sliding mode technique...
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