Studies on Compound Control-Based Single-Phase Photovoltaic Inverter

2013 ◽  
Vol 380-384 ◽  
pp. 3166-3169
Author(s):  
Peng Xue ◽  
Wei Wei ◽  
Bin Zhang
Keyword(s):  
Pid Control ◽  
Single Phase ◽  
Mathematic Model ◽  
Lower Degree ◽  
Output Waveform ◽  
Compound Control ◽  
Control Precision ◽  
Generating System ◽  
Working Efficiency

An inverter arranged in the photovoltaic generating system is required to be with higher working efficiency and lower degree of distortion on waveform. In this thesis, mathematic model of inverter has been given out through an analysis using the structure of two-level inverter, and then put forward a traditional PID control in combination with rerunning control for output waveform from an inverter. It has been proven through simulation effects that a better control precision for output waveform can be given out by this method.

Intelligent Information of TS Fuzzy PID Control System of BLDCM

2013 ◽  
Vol 846-847 ◽  
pp. 313-316 ◽  
Author(s):  
Xiao Yun Zhang
Keyword(s):  
Control System ◽  
Dynamic Model ◽  
Pid Control ◽  
Control Method ◽  
Design Method ◽  
Fuzzy Pid ◽  
Fuzzy Pid Control ◽  
Control Precision ◽  
Simulation Results ◽  
Intelligent Information

This paper presented a new method based on the Fuzzy self - adaptive PID for BLDCM. This method overcomes some defects of the traditional PID control. Such as lower control precision and worse anti - jamming performance. It dynamic model of BLDCM was built, and then design method for TS fuzzy PID model is given, At last, it compared simulation results of PID control method with TS Fuzzy PID control method. The results show that the TS Fuzzy PID control method has more excellent dynamic antistatic performances, as well as anti-jamming performance. The experiment shows that TS fuzzy PID control has the stronger adaptability robustness and transplant.

Research on Moment Coupling and Compensation Control of Three-Axis Ship Motion Simulation Turntable

2009 ◽  
Vol 419-420 ◽  
pp. 625-628 ◽  
Author(s):  
Li Hua Liang ◽  
Dong Liang Cui ◽  
Song Tao Zhang ◽  
Dong Hai Cui
Keyword(s):  
Pid Control ◽  
Ship Motion ◽  
Decoupling Control ◽  
Motion Simulation ◽  
Velocity Feedback ◽  
Compensation Control ◽  
Compound Control ◽  
Dynamic Tracking ◽  
The Moment ◽  
Robust Compensation

With regard to the high precise three-axis ship motion simulation turntable, the precision is influenced by strong dynamics coupling, such as the moment coupling when three frames rotating at the same time. Therefore, the coupling problem of three-axis ship motion simulation turntable was analyzed profoundly. Then, on the basis of the analysis, in order to restrain the disturbance of coupling torque, the method of dynamic robust compensation based on decoupling control was given. Finally, the compound control strategy including PID control, velocity feedback, position feedback ,input signal differential feedforward and dynamic robust compensation was employed, and a electromechanical Co-simulation of three-axis turntable based on ADAMS and MATLAB was completed. The results of the Co-simulation prove that the method given in this paper can restrain coupling disturbance and improve dynamic tracking performance of three-axis simulation turntable

scholarly journals A Compound Control System for FR4-Based Electromagnetic Scanning Micrograting

Electronics ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 770
Author(s):  
Fan Yu ◽  
Quan Wen ◽  
Hongjie Lei ◽  
Liangkun Huang ◽  
Zhiyu Wen
Keyword(s):  
Control System ◽  
Pid Control ◽  
Control Algorithm ◽  
Current Loop ◽  
Term Stability ◽  
Long Term Stability ◽  
Compound Control ◽  
Electromagnetic Scanning ◽  
Frequency Controller

This paper presents a compound control system for precise control of the flame-retardant 4 (FR4)-based electromagnetic scanning micrograting. It mainly consists of a frequency controller and an angle controller. A dual closed-loop structure consisting of a current loop and an angle loop was designed in the angle controller. In addition, the incremental proportional–integral–derivative (PID) control algorithm was designed in the current loop, and the fuzzy-PID control algorithm was employed in the angle loop. From the experimental results, the frequency controller can effectively track the real-time resonant frequency of the scanning micrograting with a tracking accuracy of 0.1 Hz. The overshoot of the scanning micrograting is eliminated. Compared to an open-loop control system, the control system presented in this work reduces the steady-state error of the scanning micrograting from 1.122% to 0.243%. The control accuracy of the compound control system is 0.02°. The anti-interference recovery time of the scanning micrograting was reduced from 550 ms to 181 ms, and the long-term stability was increased from 2.94% to 0.12%. In the compound control system presented in this paper, the crucial parameters of the FR4-based electromagnetic scanning micrograting, including motion accuracy, anti-interference ability, and long-term stability, were effectively improved.

scholarly journals Master and Auxiliary Compound Control for Multi-Channel Confluent Water Supply Switching Control Based on Variable Universe Fuzzy PID

2020 ◽  
Vol 10 (22) ◽  
pp. 7983
Author(s):  
Ge Zhao ◽  
Jian Wang ◽  
Wei Li ◽  
Jinsong Zhu
Keyword(s):  
Water Supply ◽  
Control Strategy ◽  
Pid Control ◽  
Fire Fighting ◽  
Step Response ◽  
Fuzzy Pid ◽  
Fuzzy Pid Control ◽  
Variable Universe ◽  
Main Pipe ◽  
Compound Control

During the multi-channel confluent water supply process, the pressure control of the main pipe is often held back by such problems as non-linearity, hysteresis and parameter uncertainty, its own unique load dynamic changes, channel switching disturbance and other system characteristics caused by the actual working conditions. Moreover, pressure fluctuations in the main pipe will lead to a reduction in the service life of fire-fighting equipment, an increase in the failure rate, and even an interruption of the fire-fighting water supply. Therefore, a master and auxiliary control strategy is proposed to stabilize the pressure change in the process of multi-channel concentrated water supply switching, by using variable universe fuzzy proportional integral derivative (PID) control as the main controller on the main pipe and traditional PID control as the subsidiary controller on the channel. The control strategy is verified by the co-simulation platforms of LabVIEW and AMESim. Simulation results show that the variable universe fuzzy PID control and the master and auxiliary compound control based on the variable universe fuzzy PID control have advantages in step response, tracking response and anti-interference, respectively. The parameters obtained in the co-simulation are used in the experimental system. The experimental results show that the maximum deviation rate of main pipe pressure can be reduced by about 10% compared with other control methods under different loads. In conclusion, the proposed control strategy has strong anti-interference ability, fast dynamic response speed, high stability and good peak shaving effect.

BLDC Motor Torque Ripple Control Using Self-Tuning PID Fuzzy Control System

2016 ◽  
Vol 851 ◽  
pp. 459-463 ◽  
Author(s):  
Chao Wang ◽  
Zhuang Li ◽  
Guang Qing Kang ◽  
Chun Yan Zeng
Keyword(s):  
Control System ◽  
Fuzzy Control ◽  
Pid Control ◽  
Torque Ripple ◽  
Static Characteristic ◽  
Bldc Motor ◽  
Fuzzy Control System ◽  
Control Precision ◽  
Self Tuning ◽  
High Control

In order to suppress the torque ripple of the BLDC motor, at the same time considering the nonlinear and uncertainty of the BLDC motor, this paper mainly proposes a self-tuning PID fuzzy algorithm to control the torque ripple. Self-tuning PID fuzzy control is integrating the advantages of PID control system and fuzzy control system, using the error and change of error as inputs, and adjustment of PID parameter on-line by fuzzy control rules. Self-tuning PID fuzzy has the advantages of flexible and adaptable, and also have the characteristics of traditional PID control system such as broad applicability and high control precision. The results of simulation show that the self-tuning PID fuzzy control can suppress the torque ripple of BLDC motor effectively, the optimization of the dynamic and static characteristic of the system, satisfying the requirements of system performance, the superiority and reliability of the control strategy was verified.

Shipboard Radar Servo System PID Parameters Turning Based on Simulink

2014 ◽  
Vol 536-537 ◽  
pp. 1121-1124
Author(s):  
Qiu Qi Ding ◽  
Min Tao ◽  
Xin Rong Wang
Keyword(s):  
Pid Control ◽  
Dynamic Performance ◽  
Servo System ◽  
Mathematic Model ◽  
Parameter Tuning ◽  
Fuzzy Pid Control ◽  
Simulation Experiments ◽  
Loop Bandwidth ◽  
Self Tuning ◽  
On Line

This paper expounds the structure and principle of shipboard radar servo system, according to traditional PID parameter tuning problem, the parameter self-tuning fuzzy PID control technology is applied to the servo system position loop, through the simulation experiments show that the method can 't depend on the mathematic model of the system, and according to the relation between input and output of the PID parameters on-line adjustment, automatic adjustment loop bandwidth, increase the system dynamic performance and steady performance, strong robustness and adaptability.

Variable Universe Fuzzy PID Control for Minimally Invasive Operation Robotic Catheter System

2014 ◽  
Vol 618 ◽  
pp. 470-474
Author(s):  
Jing Bo Shi
Keyword(s):  
Minimally Invasive ◽  
Pid Control ◽  
Control Method ◽  
Response Speed ◽  
Fuzzy Pid ◽  
Fuzzy Pid Control ◽  
Fast Tracking ◽  
Variable Universe ◽  
Control Precision ◽  
Minimally Invasive Operation

Robotic catheter minimally invasive operation requires control system of quick response, strong anti-jamming and real-time tracking of target trajectory. The contradiction between fuzzy PID control precision and its response speed limits its application in master-slave minimally invasive operation. The paper adopted variable universe fuzzy PID method to improve fuzzy PID method’s control precision without reducing the speed of response. The simulation results show that variable universe fuzzy PID control method has fast tracking performance and strong robustness, and it has feasibility and practicability in robotic catheter minimally invasive operation.

The Research of Electro-Hydraulic Proportional Control on Copper Anode Lifting Platform

2012 ◽  
Vol 233 ◽  
pp. 172-176
Author(s):  
Zhi Fei Peng ◽  
Rui Bo Yuan ◽  
Jing Luo ◽  
Rong Li
Keyword(s):  
Adaptive Control ◽  
Pid Control ◽  
Simulation Models ◽  
Mathematic Model ◽  
Adaptive Controller ◽  
Hydraulic Cylinder ◽  
Copper Anode ◽  
Working Principle ◽  
Hyperstability Theory ◽  
Model Reference Adaptive

This paper introduces the structure and working principle of the designed copper anode lifting platform. According to the actual working conditions and the structure of the lifting device, hydraulic system of electro-hydraulic proportional synchronous lifting device is designed and its working principle is analyzed. This paper takes the electro-hydraulic synchronization system as a research subject, whose mathematic model is established. To solve the synchronization accuracy of the hydraulic cylinder movement in the lifting process, a model reference adaptive controller is designed which is based on hyperstability theory. Both system simulation models of traditional PID control and adaptive control are established respectively in the software of Matlab/Simulink. Through the simulation result we can learn that adaptive control is batter than the PID control. Two hydraulic cylinders synchronization error is less than 0.02mm.

Research on Fuzzy Control of the Hydraulic System for Continuously Variable Transmission

2010 ◽  
Vol 29-32 ◽  
pp. 2114-2118
Author(s):  
Chang Zhou Wang ◽  
Jin Chun Song ◽  
Song Li
Keyword(s):  
Control System ◽  
Pid Control ◽  
Velocity Ratio ◽  
Mathematic Model ◽  
Hydraulic Control ◽  
Response Characteristics ◽  
Variable Transmission ◽  
Ratio Change ◽  
Self Adaptation ◽  
Key Techniques

Velocity ratio control is one of the key techniques of vehicle metal V-belt type CVT. In this paper, the working principle and hydraulic control system principle of the metal V-belt type CVT were introduced; the mathematic model and fuzzy self-adaptation PID control model of the velocity ratio electrohydraulic proportional control system were established and simulated. It was found that, fuzzy self-adaptation PID control system makes actual velocity ratio change as it was expected with good steady-state characteristics and dynamic response characteristics.

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