Closed-loop control modeling and dynamic performance analysis of 400Hz active filter

2013 ◽  
Author(s):  
Zhong Chen ◽  
Zhihui Wang ◽  
Mengnan Li ◽  
Miao Chen
Keyword(s):  
Performance Analysis ◽  
Closed Loop ◽  
Dynamic Performance ◽  
Active Filter ◽  
Closed Loop Control ◽  
Loop Control ◽  
Dynamic Performance Analysis ◽  
Control Modeling

A High-Frequency Inverter Based on Double Closed-Loop Control

2012 ◽  
Vol 241-244 ◽  
pp. 509-512
Author(s):  
Lin Yang ◽  
Gen Wang Liu
Keyword(s):  
High Frequency ◽  
Closed Loop ◽  
Control Structure ◽  
Dynamic Performance ◽  
Current Loop ◽  
Closed Loop Control ◽  
Voltage Waveform ◽  
Loop Control ◽  
Static Performance ◽  
Frequency Inverter

In order to improve the dynamic performance of inverter and the output voltage waveform quality, the double-loop control combination with internal current loop and external voltage loop is introduced. The inner loop is used for improving the dynamic performance of the system and rapidly eliminating the effects of load disturbance; the outer loop is used for improving static performance of the system. In the end, MATLAB / Simulink is carried out to build the system model and prove the feasibility of the dual closed-loop control structure in this paper.

scholarly journals No-Tension Sensor Closed-Loop Control Method with Adaptive PI Parameters for Two-Motor Winding System

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Zhiqiang Wang ◽  
Haibao Nan ◽  
Tingna Shi ◽  
Qiang Geng ◽  
Changliang Xia
Keyword(s):  
Closed Loop ◽  
Control Method ◽  
Recursive Algorithm ◽  
Dynamic Performance ◽  
Tension Control ◽  
Closed Loop Control ◽  
Loop Control ◽  
Measurement Delay ◽  
Tension Sensor ◽  
Tension Control System

In a winding system, it is very important to control the tension precisely. Based on the process of rewinding and unwinding, a sensorless tension control method with PI parameters of adaptive speed controllers is proposed in this paper. According to the principle of torque balance, a tension observer is designed to replace the tension sensor, and the observed value instead of the measured value of tension is used as feedback. Then the measurement delay caused by tension sensor is reduced. For the time-variable inertia, Landau discrete-time recursive algorithm is used to estimate the inertias of the rewind and unwind motors. Moreover, the estimated inertias are used to adjust the PI parameters of the speed controllers. As the tension control system has the ability to adapt to the change of inertia, its dynamic performance is improved to some extent. In addition, the proposed sensorless tension control method is simple and easy to implement, which only uses the current and speed signals of the motors without any additional hardware needed. At last, the feasibility and effectiveness of the proposed method are verified by the experimental results.

Dynamic and Control Modeling and Simulation of High Speed Precision Positioning XY Table

2011 ◽  
Vol 467-469 ◽  
pp. 978-983
Author(s):  
Zhi Peng Ma ◽  
Xing Yu Zhao ◽  
Fu Jun Wang ◽  
Da Wei Zhang
Keyword(s):  
Control Strategy ◽  
High Speed ◽  
Closed Loop ◽  
Dynamic Performance ◽  
Matching Law ◽  
Closed Loop Control ◽  
Precision Positioning ◽  
Loop Control ◽  
Decoupling Mechanism ◽  
And Control

To study the dynamic performance and control strategy of a kind of high speed precision positioning XY table with a new kind of decoupling mechanism, the electromechanical co-simulation model with three closed-loop control system using proportional–integral–derivative controller (PID controller) is constructed. By use of finite element analysis (FEA) and co-simulation method, the preloaded spring as the key component in the decoupling mechanism is optimized. The matching law of the spring stiffness and preload is presented. The decoupling mechanism influence on the dynamic performance of the XY table during the movement is fully discussed. Based on the electromechanical model, a three closed-loop control scheme with disturbance observer and feed-forward controller is proposed. Co-simulation results demonstrate the validity of the control strategy.

Research on Closed-Loop Control of the Step Response

2011 ◽  
Vol 127 ◽  
pp. 71-76 ◽  
Author(s):  
Xin Ping Wang ◽  
Jian Jun Dang ◽  
Zhi Cao Zhao
Keyword(s):  
Closed Loop ◽  
Dynamic Performance ◽  
Thermal Power ◽  
Step Response ◽  
Closed Loop Control ◽  
Loop Control ◽  
Intermediate Variable ◽  
Closed Loop Control System ◽  
Loop Control System ◽  
Control System Model

Based on the analysis of six kinds of working points, the process function of torpedo thermal power propulsion system is solved. The results show that the process transfer function is approximate to inertial link. PI control algorithm is presented and its parameters are deduced. The algorithm can not only control the output variables, but also can monitor the intermediate variable. Closed-loop control system model is established. Variable speed characteristics of torpedo at constant depth and steady speed characteristics in depth-changed process are simulated by MATLAB. Simulation results indicate that the system has satisfactory dynamic performance and the control quality performs well.

Sign in / Sign up

Export Citation Format

Share Document