A Constant Tension Control Device of Mechanical Feedback

2013 ◽  
Vol 397-400 ◽  
pp. 409-412
Author(s):  
Ze Ding Wei ◽  
Han Chao Xu ◽  
Hui Su
Keyword(s):  
Control Method ◽  
Control Device ◽  
Tension Control ◽  
Electromagnetic Environment ◽  
Loop Control ◽  
Balance Principle ◽  
Flexible Material ◽  
Constant Tension ◽  
Brake Block ◽  
Mechanical Feedback

A constant tension control device of mechanical feedback is designed for the tension adjustment between the unwinding and rewinding of the flexible material, and the structure and size of the device are given. According to torque balance principle and based on purely mechanical structure, this device can control tension by adjusting the frictional force between the brake block and the unwinding wheel. The tension of controlling the unwinding and rewinding of the flexible material is analyzed, and then the control method of the tension is illustrated. Compared with the common closed loop control devices with tension feedback, the structure of the proposed device is simpler, and it has a stronger capacity of resisting disturbance in complicated electromagnetic environment.

Tension Control Strategy in Plastic Film Printing Process

2013 ◽  
Vol 655-657 ◽  
pp. 1321-1325
Author(s):  
Peng Sun ◽  
Peng Cao
Keyword(s):  
Control Method ◽  
Friction Torque ◽  
Tension Control ◽  
Rotational Inertia ◽  
Plastic Film ◽  
Diameter Measurement ◽  
Dynamic Tension ◽  
Drive Control ◽  
Coil Diameter ◽  
Constant Tension

The character of the tension control in the plastic-film printing was introduced, and the coiler drive control method was given. The indirect constant tension control method was analyzed, and the key parameters were given, also the method of coil diameter measurement with distance meter, the friction torque in different rotate speed was given by the friction torque test; the method of rotational inertia measurement which influence the dynamic tension was put forward.

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.

Research and Application of a New Constant Tension Control Device of the Carbon Fiber Warping Machine

2013 ◽  
Vol 846-847 ◽  
pp. 40-43
Author(s):  
Jian Feng Qin ◽  
Xiu Ming Jiang ◽  
Jian Cheng Yang ◽  
Hua Qing Wang ◽  
Kai Yang ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Shear Strength ◽  
Carbon Fiber ◽  
Control Device ◽  
Tension Control ◽  
High Tensile Strength ◽  
Yarn Tension ◽  
Warp Tension ◽  
Constant Tension ◽  
Low Shear

This paper presents a new constant tension control device which is suitable for warping of the carbon fiber or the flake yarns which are zero twist, high tensile strength, low shear strength, high specific modulus and self-lubrication and can meet the requirements of the warp tension of the carbon fiber multi-layer weaving equipment which is in the process of development. The device can make yarn tension consistent in warping process. Especially with the decrease of the diameter of yarn tube, the tension of yarn sheet is consistent in warping process. In the process of warping the warp doesnt twist and wear is small. The experimental results show that the mechanism can realize accurate control on the tension of the single yarn and the yarn sheet, and is able to meet the requirements of the warp tension of the carbon fiber multi-layer weaving equipment which is in the process of development.

An uplink power optimization solution for satellite HUBs station based on closed-loop control algorithm

2021 ◽  
pp. 28-36
Author(s):  
Do Xuan Quyet
Keyword(s):  
Power Control ◽  
Closed Loop ◽  
Satellite Communication ◽  
Power Optimization ◽  
Control Method ◽  
Control Device ◽  
Loop Control ◽  
Wave Path ◽  
Automatic Power Control ◽  
The Impact

In this paper, we present a power optimization solution based on the automatic power control method using a closed-loop algorithm for the uplink power control device (UPC) of the satellite communication HUB station. The results are evaluated by theoretical analysis and validated by simulation model on Matlab software, finally the model has also been used in the UPC device and tested in practice. The simulation process, and the test is carried out under the impact of varying rainfall on the wave path, the results are compared with the solutions that have been and are being used to demonstrate the effectiveness of the solution. This paper is the research product of the project "Researching, designing and manufacturing the uplink power controller military satellite communication system".

Research Rewinding Machine Constant Tension Control System

2014 ◽  
Vol 926-930 ◽  
pp. 1558-1561
Author(s):  
Jian Xin Yuan ◽  
Meng Ke Lu
Keyword(s):  
Closed Loop ◽  
Open Loop ◽  
Tension Control ◽  
Open Loop Control ◽  
Motor Speed ◽  
Loop Control ◽  
Digital Pid ◽  
System Use ◽  
Constant Tension ◽  
Tension Control System

In industrial production process, Often due to winding or rewind tension control during problems lead to product quality problems. The reeling tension system complexity, uncertainty, simple open loop control cannot achieve the desired effect. The system use the MITSUBISHI FX3U series PLC as the control core. By sampling the floating roll location, the use of digital PID closed loop control winding motor speed so that the floating roll location constant so as to realize the constant tension control of winding

Design and Research on Constant Tension Controller in Electric Power Transmission

2012 ◽  
Vol 566 ◽  
pp. 377-381
Author(s):  
Yun Ping Yao ◽  
Chu Ran Qiu ◽  
Zeng Zhao Cao
Keyword(s):  
Transmission Lines ◽  
Power Transmission ◽  
Control Method ◽  
Response Characteristic ◽  
Tension Control ◽  
Constant Tension ◽  
Dynamic Response Characteristic ◽  
Tension Control System ◽  
Control Principle ◽  
And Control

In order to improve the characteristic and control strategy in transmission lines, a tension stringing mathematical model was established which analyzed the multiple disturbance factors of tension. According to the tension control principle of hydraulic system and the influence of different factors, a control method of constant tension adapted to the system was proposed based on pressure regulating plan. By simulation, the modified tension control system enhanced the dynamic response characteristic and stability effectively, which can realize the ideal constant tension control.

An Efficient Approach for Modeling and Control of a Quadrotor

2016 ◽  
Vol 4 (2) ◽  
pp. 1-16
Author(s):  
Ahmed S. Khusheef
Keyword(s):  
Pid Control ◽  
Control Method ◽  
Mechanical Design ◽  
Loop Control ◽  
Modeling And Control ◽  
Loop Control System ◽  
And Control ◽  
Close Loop Control ◽  
Close Loop Control System ◽  
Made In

 A quadrotor is a four-rotor aircraft capable of vertical take-off and landing, hovering, forward flight, and having great maneuverability. Its platform can be made in a small size make it convenient for indoor applications as well as for outdoor uses. In model there are four input forces that are essentially the thrust provided by each propeller attached to each motor with a fixed angle. The quadrotor is basically considered an unstable system because of the aerodynamic effects; consequently, a close-loop control system is required to achieve stability and autonomy. Such system must enable the quadrotor to reach the desired attitude as fast as possible without any steady state error. In this paper, an optimal controller is designed based on a Proportional Integral Derivative (PID) control method to obtain stability in flying the quadrotor. The dynamic model of this vehicle will be also explained by using Euler-Newton method. The mechanical design was performed along with the design of the controlling algorithm. Matlab Simulink was used to test and analyze the performance of the proposed control strategy. The experimental results on the quadrotor demonstrated the effectiveness of the methodology used.

scholarly journals The Study of Dynamic Modeling and Multivariable Feedback Control for Flexible Manipulators with Friction Effect and Terminal Load

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1522
Author(s):  
Fuli Zhang ◽  
Zhaohui Yuan
Keyword(s):  
Dynamic Model ◽  
Vibration Suppression ◽  
Control Method ◽  
Coupling Effect ◽  
Flexible Manipulator ◽  
Flexible Beam ◽  
Robot Dynamics ◽  
Joint Friction ◽  
Balance Principle ◽  
Multivariable Feedback

The flexible manipulato is widely used in the aerospace industry and various other special fields. Control accuracy is affected by the flexibility, joint friction, and terminal load. Therefore, this paper establishes a robot dynamics model under the coupling effect of flexibility, friction, and terminal load, and analyzes and studies its control. First of all, taking the structure of the central rigid body, the flexible beam, and load as the research object, the dynamic model of a flexible manipulator with terminal load is established by using the hypothesis mode and the Lagrange method. Based on the balance principle of the force and moment, the friction under the influence of flexibility and load is recalculated, and the dynamic model of the manipulator is further improved. Secondly, the coupled dynamic system is decomposed and the controller is designed by the multivariable feedback controller. Finally, using MATLAB as the simulation platform, the feasibility of dynamic simulation is verified through simulation comparison. The results show that the vibration amplitude can be reduced with the increase of friction coefficient. As the load increases, the vibration can increase further. The trajectory tracking and vibration suppression of the manipulator are effective under the control method of multi-feedback moment calculation. The research is of great significance to the control of flexible robots under the influence of multiple factors.

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