Study on Comprehensive Performance Testing Table and Intelligent Measuring Technology of Constant Velocity Universal Joint Assembly

2012 ◽  
Vol 591-593 ◽  
pp. 1539-1542
Author(s):  
Lun Shi ◽  
Xu Qi Qin ◽  
Xiao Jun Liu
Keyword(s):  
Constant Velocity ◽  
Performance Testing ◽  
Fuzzy Reasoning ◽  
Measuring Method ◽  
Measurement Precision ◽  
Universal Joint ◽  
Fuzzy Method ◽  
Comprehensive Performance ◽  
And Control ◽  
Joint Assembly

A comprehensive performance testing table, on which 9 testing items can be done, of the constant velocity joint drive shaft assembly is developed. The principle of the system is introduced and the mechanical structure and the computer measuring and control system of it are discussed particularly. Some intelligent measuring methods, such as fuzzy method, are used in the system and an example of testing the slip curve characteristic of the joint assembly by fuzzy measuring method is presented in detail, including its membership function and fuzzy rules of fuzzy reasoning. The slip curve measured by traditional method compared with that by fuzzy method. The experimental results show that the measurement precision by fuzzy method is more accurate than that by the traditional one.

Study on Control System and Precision Positioning Table Identification Technology of Universal Joint Performance Testing Table

2014 ◽  
Vol 528 ◽  
pp. 217-221
Author(s):  
Jia Bao Chen ◽  
Lun Shi ◽  
Xu Qi Qin
Keyword(s):  
Control System ◽  
System Identification ◽  
Constant Velocity ◽  
Performance Testing ◽  
Measuring Method ◽  
Universal Joint ◽  
Testing Program ◽  
System Identification Method ◽  
Comprehensive Performance ◽  
Working Principle

A comprehensive performance testing table of the constant velocity joint drive shaft assembly is discussed in this paper. This testing table is able to operate 9 testing items. The mechanical structure, the working principle, and the software system of the testing table is introduced respectively. Intelligent measuring method and LCOD technique is used in the system. System identification method is applied while designing the control system. An example of slip curve testing program is also given at this paper.

scholarly journals Experimental Strain Measurement Approach Using Fiber Bragg Grating Sensors for Monitoring of Railway Switches and Crossings

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3639
Author(s):  
Abdelfateh Kerrouche ◽  
Taoufik Najeh ◽  
Pablo Jaen-Sola
Keyword(s):  
Fiber Bragg Grating ◽  
Experimental Tests ◽  
Cost Effective ◽  
Measuring Method ◽  
Bragg Grating ◽  
Railway Network ◽  
System Failures ◽  
Railway Infrastructure ◽  
Train Speed ◽  
And Control

Railway infrastructure plays a major role in providing the most cost-effective way to transport freight and passengers. The increase in train speed, traffic growth, heavier axles, and harsh environments make railway assets susceptible to degradation and failure. Railway switches and crossings (S&C) are a key element in any railway network, providing flexible traffic for trains to switch between tracks (through or turnout direction). S&C systems have complex structures, with many components, such as crossing parts, frogs, switchblades, and point machines. Many technologies (e.g., electrical, mechanical, and electronic devices) are used to operate and control S&C. These S&C systems are subject to failures and malfunctions that can cause delays, traffic disruptions, and even deadly accidents. Suitable field-based monitoring techniques to deal with fault detection in railway S&C systems are sought after. Wear is the major cause of S&C system failures. A novel measuring method to monitor excessive wear on the frog, as part of S&C, based on fiber Bragg grating (FBG) optical fiber sensors, is discussed in this paper. The developed solution is based on FBG sensors measuring the strain profile of the frog of S&C to determine wear size. A numerical model of a 3D prototype was developed through the finite element method, to define loading testing conditions, as well as for comparison with experimental tests. The sensors were examined under periodic and controlled loading tests. Results of this pilot study, based on simulation and laboratory tests, have shown a correlation for the static load. It was shown that the results of the experimental and the numerical studies were in good agreement.

Development of a Ring Permeability Test System

2010 ◽  
Vol 136 ◽  
pp. 153-157
Author(s):  
Yu Hong Du ◽  
Xiu Ming Jiang ◽  
Xiu Ren Li
Keyword(s):  
Control System ◽  
Control Method ◽  
Dynamic Performance ◽  
Experimental Tests ◽  
Measuring Method ◽  
Test System ◽  
Fluid Theory ◽  
And Control ◽  
Relationship Of ◽  
The Mathematical Model

To solve the problem of detecting the permeability of the textile machinery, a dedicated test system has been developed based on the pressure difference measuring method. The established system has a number of advantages including simple, fast and accurate. The mathematical model of influencing factors for permeability is derived based on fluid theory, and the relationship of these parameters is achieved. Further investigations are directed towards the inherent characteristics of the control system. Based on the established model and measuring features, an information fusion based clustering control system is proposed to implement the measurement. Using this mechanical structure, a PID control system and a cluster control system have been developed. Simulation and experimental tests are carried out to examine the performance of the established system. It is noted that the clustering method has a high dynamic performance and control accuracy. This cluster fusion control method has been successfully utilized in powder metallurgy collar permeability testing.

Design on High-Precision Condensation Water Measurement in Air Conditioner Performance Testing Chamber

2013 ◽  
Vol 427-429 ◽  
pp. 949-952
Author(s):  
Yuan Yuan Huang ◽  
Fang Wang ◽  
Yi Wei Xiong ◽  
Tian Wu Li ◽  
Yong Li Chen
Keyword(s):  
Performance Test ◽  
Performance Testing ◽  
Measuring Method ◽  
Cooling Capacity ◽  
Test System ◽  
Air Conditioner ◽  
Conservation Of Energy ◽  
Balance Principle ◽  
Testing Chamber ◽  
Water Measurement

Before putting air conditioner into market, it must be checked strictly by inspection department. Balanced ambient room-type calorimeter chamber is used to measure the conditioner performance according to energy balance principle. At present, the principle of conservation of energy is a method with higher accuracy for air conditioner test. In this paper, we focus on introducing the measuring method of condensed water in the test system after explaining the principle of the air conditioning performance test balanced ambient room-type calorimeter chamber. it is used to balance the capacity measured in evaporator air conditioner by controlling the water inflow of the humidifier. In this way, can we achieve precise measuring the cooling capacity of the air conditioner.

Intelligent Control for Container Terminal AGV

1998 ◽  
Vol 2 (3) ◽  
pp. 72-76
Author(s):  
Masanori Ito ◽  
◽  
Feifei Zhang
Keyword(s):  
Intelligent Control ◽  
Container Terminal ◽  
Performance Testing ◽  
Container Terminals ◽  
Vehicle Performance ◽  
Container Cranes ◽  
Automation And Control ◽  
Cargo Transportation ◽  
And Control

The world's container cargo trading is increasing daily, and the role of the container terminal is becoming more important as the center of cargo transportation. In Japan, new container terminals being constructed face very severe competition with larger, cheaper terminals so they must handle cargo more efficiently and cheaply. To cope, handling systems such as container cranes, yard cranes, and conveyers are being automated to enable unattended operation unloading and loading schedule planning, etc., are being computerized. In these system, crane automation and control computerization are already generalized, but automatic control of container conveyers is not completed yet. The container conveyer -15m long, 4m wide, and 1.5m high - picks up containers from container ships with a container crane and hauls them to the shift yard for release to the yard crane. Both crane are operated automatically, so the conveyer must stop at the desired position within a permissible error of ±7.5cm, and run on a predetermined course and speed. Collision avoidance is required because many vehicles oparate on the same course. The automated guided vehicle (AGV) system, which is diesel-driven, 4WS and 4WD, was thought to be effective, but container weights very widely, as do road conditions which depend on weather, so conventional control is not sufficient to maintain the required accuracy. We applied learning control to maintain the desired course and for stopping at the desired position. Speed was controlled, conventionally. The system's applicability was confirmed with computer simulation and vehicle performance testing. This system will be used at the Kawasaki container terminal in 1999 and we are currently working on improving performance.

The Scope for a Compliant Homokinetic Coupling Based on Review of Compliant Joints and Rigid-Body Constant Velocity Universal Joints

2012 ◽  
Author(s):  
Davood Farhadi Machekposhti ◽  
N. Tolou ◽  
J. L. Herder
Keyword(s):  
Rigid Body ◽  
Constant Velocity ◽  
Compliant Mechanism ◽  
Analytical Data ◽  
Graph Representation ◽  
Universal Joint ◽  
Compliant Joints ◽  
Cylindrical Joint ◽  
Body Joints ◽  
Universal Joints

Many applications require a compliant mechanism to transmit rotation from one direct to another direct with constant velocity. This paper presents a literature survey towards the design of compliant constant velocity universal joints. The traditional constant velocity universal joints available from the literature were studied, classified and their mechanical efficiencies were compared. Also the graph representation of them was studied. In the same manner, literature review for different kind of compliant joints suitable for the Rigid-Body-Replacement of constant velocity universal joints was also performed. For the first time a comparison with analytical data of compliant joints was performed. All of compliant universal joints are non-constant velocity and designed based on rigid Hooke’s universal joint. Also we show there are no equivalent compliant joints for some rigid-body joints such as cylindrical joint, planar joint, spherical fork joint and spherical parallelogram quadrilateral joint. However, we may achieve them by combining numbers of available compliant joints. The universal joints found are non-compliant non-constant velocity universal joint, non-compliant constant velocity universal joint or compliant non-constant velocity universal joint. A compliant constant velocity universal joint has a great horizon for developments, for instance in medical or rehabilitation devices.

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