A Preliminary Study on Application of Closed-loop Cross Compensation Control in Accelerated Fatigue Testing

2017 ◽  
Author(s):  
Zhao Hongwei ◽  
Duan Shihui ◽  
Feng Jianmin
Keyword(s):  
Closed Loop ◽  
Fatigue Testing ◽  
Compensation Control ◽  
Preliminary Study

Research on Direct Tension Control of Underfeed Winder

2012 ◽  
Vol 203 ◽  
pp. 18-21
Author(s):  
Hui Fang ◽  
Wei Tang ◽  
Yan Jing Meng
Keyword(s):  
Load Distribution ◽  
Closed Loop ◽  
Pressure Control ◽  
Tension Control ◽  
Volume Control ◽  
Direct Tension ◽  
Dynamic Compensation ◽  
Compensation Control

The paper analyzes the method of direct tension control, provides repaired method of closed loop speed for tension control of underfeed winder, and designs the systematic hardware figuration and software to effectively meet the demands of different volume control. Furthermore, the problems including pressure control of pressing roller, load distribution control of two-drum winder, tension control of paper, and dynamic compensation control were analyzed and solved through the design of hardware and software of S7-300 PLC.

Development of a Closed-Loop High-Cycle Resonant Fatigue Testing System

2011 ◽  
Vol 52 (3) ◽  
pp. 275-288 ◽  
Author(s):  
G. J. Yun ◽  
A. B. M. Abdullah ◽  
W. Binienda
Keyword(s):  
Closed Loop ◽  
Fatigue Testing ◽  
Testing System

scholarly journals Individualized closed-loop control of propofol anesthesia: A preliminary study

2013 ◽  
Vol 8 (6) ◽  
pp. 500-508 ◽  
Author(s):  
Kristian Soltesz ◽  
Jin-Oh Hahn ◽  
Tore Hägglund ◽  
Guy A. Dumont ◽  
J. Mark Ansermino
Keyword(s):  
Closed Loop ◽  
Closed Loop Control ◽  
Loop Control ◽  
Preliminary Study

Acceleration waveform replication on six-degree-of-freedom redundant electro-hydraulic shaking tables using an inverse model controller with a modelling error

2016 ◽  
Vol 40 (3) ◽  
pp. 968-986 ◽  
Author(s):  
Gang Shen ◽  
Zhen-Cai Zhu ◽  
Xiang Li ◽  
Qing-Guo Wang ◽  
Ge Li ◽  
...  
Keyword(s):  
Transfer Function ◽  
Closed Loop ◽  
Fatigue Testing ◽  
Phase Error ◽  
Inverse Model ◽  
Shaking Table ◽  
Phase System ◽  
Earthquake Simulation ◽  
Loop Transfer Function ◽  
Modelling Error

A redundant electro-hydraulic shaking table (REST) of six degrees-of-freedom (6 DOFs) with eight hydraulic actuators is an essential experimental tool in many industrial applications for real-time simulation of actual vibrations, such as structural vibration, earthquake simulation and fatigue testing. In order to obtain a high-fidelity acceleration waveform on the REST, a feed-forward inverse model (FFIM) controller with a modelling error compensator is proposed in this study. A recursive extended least-squares algorithm is employed to identify an acceleration closed-loop transfer function of the REST. A zero phase error compensation technology is employed to guarantee stability of the designed FFIM because the identified acceleration closed-loop transfer function is a typical non-minimum phase system and its direct inverse transfer function is unstable. The modelling error compensator is designed to compensate for the modelling error between the identified transfer function and the actual experimental REST, which deteriorates the acceleration waveform replication accuracy of the REST. A 6 DOF REST experimental system was used to verify the proposed controller. Experimental results demonstrated that the proposed controller gave satisfactory acceleration tracking performances on the REST.

Development of a biaxial fatigue testing rig

1975 ◽  
Vol 10 (1) ◽  
pp. 1-9 ◽  
Author(s):  
M W Parsons ◽  
K J Pascoe
Keyword(s):  
Closed Loop ◽  
Fatigue Testing ◽  
Hydraulic Testing ◽  
Servo Control ◽  
Development Work ◽  
Biaxial Fatigue ◽  
Servo Control System ◽  
Hydraulic Cylinders ◽  
Principal Directions ◽  
Further Development

A biaxial fatigue testing rig which employs cruciform specimens loaded by four double-acting hydraulic cylinders has been improved by the addition of a closed-loop servo-control system. This system enables the loads or strains in the two principal directions to be varied independently of each other. The paper describes the modifications that were made to the system and the various problems then encountered. Further development work was then necessary before the rig operated satisfactorily. The details are published to be of assistance to others who may wish to construct specialist servo-controlled hydraulic testing equipment.

Sign in / Sign up

Export Citation Format

Share Document