A new test rig for static and dynamic evaluation of knee motion based on a cable-driven parallel manipulator loading system

Meccanica ◽  
2015 ◽  
Vol 51 (7) ◽  
pp. 1571-1581 ◽  
Author(s):  
Margherita Forlani ◽  
Nicola Sancisi ◽  
Michele Conconi ◽  
Vincenzo Parenti-Castelli
Keyword(s):  
Parallel Manipulator ◽  
Test Rig ◽  
Knee Motion ◽  
Dynamic Evaluation ◽  
Loading System

Soft-Switchable Dual-PI Controlled Axial Loading System for High-Speed EMU Axle-Box Bearing Test Rig

2015 ◽  
Vol 62 (12) ◽  
pp. 7370-7381 ◽  
Author(s):  
Bo-Qian Fan ◽  
Kok-Meng Lee ◽  
Xiao-Ping Ouyang ◽  
Hua-Yong Yang
Keyword(s):  
High Speed ◽  
Axial Loading ◽  
Test Rig ◽  
Loading System

Design of iron bird for a regional jet aircraft

2019 ◽  
Vol 234 (3) ◽  
pp. 681-688
Author(s):  
Dawei Li ◽  
Mingxing Lin ◽  
Liang Tian
Keyword(s):  
Mathematical Model ◽  
Fault Diagnosis ◽  
Modular Design ◽  
Test Validation ◽  
Test Results ◽  
Test Rig ◽  
Design Improvement ◽  
Test Systems ◽  
Trouble Shooting ◽  
Loading System

A regional jet’s iron bird was built for trouble shooting and design improvement of its airborne system. Modular design architecture and overall plan for the iron bird were proposed, and structure of the test rig, main tested systems, relevant supporting test systems and test programs were described. Besides, as one of the most critical airborne systems, NLG loading system was chosen for deep research; its mathematical model was built and analyzed in detail. Test results of hydraulic system’s main parameters were given. The whole iron bird provided important guarantee for system testing and continued design improvement. Also, test validation level for multi systems integration and fault diagnosis level of airborne system were improved.

Research on Steering Dynamic Characteristics of Tracked Vehicle Transmission System

2011 ◽  
Vol 105-107 ◽  
pp. 532-535
Author(s):  
Pei Xin Li ◽  
Xiao Jun Zhou ◽  
Yan Ding Wei ◽  
Fang Tang
Keyword(s):  
Dynamic Characteristics ◽  
Evaluation System ◽  
Transmission System ◽  
Test Method ◽  
Operating Characteristics ◽  
Test Rig ◽  
Test Procedures ◽  
Tracked Vehicle ◽  
Practical Test ◽  
Loading System

Based on the operating characteristics of tracked vehicle transmission system, the dynamic characteristics and research methods for transmission system were summarized. According to the analysis of above, a new test rig which can simulate the steering process of tracked vehicle was proposed, and the methods for driving and loading system were determined, the test procedures and evaluation system for the tracked vehicle transmission system were summed up. It provides a practical test method for the design and development of tracked vehicle transmission system.

A novel dynamic evaluation method and its application to a 4-DOF parallel manipulator

2022 ◽  
Vol 168 ◽  
pp. 104627
Author(s):  
Jun Wu ◽  
Hao Ye ◽  
Guang Yu ◽  
Tian Huang
Keyword(s):  
Parallel Manipulator ◽  
Evaluation Method ◽  
Dynamic Evaluation

Performance Evaluation of Thrust Washer Bearings Using a Customized Bench Scale Test Rig

2016 ◽  
Author(s):  
Kyle Myers ◽  
Sean Jenson ◽  
Mike Brooksbank ◽  
Muhammad Ali ◽  
Khairul Alam ◽  
...  
Keyword(s):  
Operating Conditions ◽  
Drive System ◽  
Direct Drive ◽  
Test Rig ◽  
Oil Film ◽  
Speed Controller ◽  
Loading System ◽  
Scale Test ◽  
Main Support ◽  
Bench Scale Test

The work presented here outlines details of tests performed on thrust washer bearings using a customized test rig, which was designed, fabricated, and instrumented to conduct tests on thrust washer bearings of varying sizes and thicknesses. The test rig was able to vary speed, axial load, oil input pressure, and oil input temperature. The system was composed of 6 main parts; the structure, drive system, runner, instrumentation pad, loading system, and instrumentation. The main support structure was fabricated using 1 inch square hollow bar stock steel (1018 steel). A 1 hp DC motor with a max speed of 3050 rpm and varying speed controller was used as a direct drive system to spin the runner against the bearing. The tests were conducted on three aluminum bearings of same design under almost constant operating conditions. The data obtained from tests performed on bearings included oil temperature, bearing temperature, oil film thickness, and pressure on bearing pads. It was found that the temperature at the surface of bearing and oil film pressure was directly related to the applied load. This information will be used to advance our understanding of smaller diameter thrust washer bearings and will assist in extrapolating these results to improve upon larger scale bearings.

Development of Load System for High-Speed Railway Rolling

2013 ◽  
Vol 418 ◽  
pp. 172-179
Author(s):  
Peng Chen ◽  
Bo Qian Fan ◽  
Min Su ◽  
Jing Wang ◽  
Xiao Ping Ouyang
Keyword(s):  
High Speed ◽  
Operating Conditions ◽  
Gap Effect ◽  
Test Rig ◽  
High Speed Railway ◽  
Technical Requirements ◽  
Load Response ◽  
Loading System ◽  
Hydraulic Servo ◽  
Applied Design

High-speed railway rolling bearings are tested on a special test rig, where large transit axial and radial load is applied. Design of loading structure and electro-hydraulic servo loading system are used in the rig to simulate the real operating conditions of the bearings. A segment control strategy using different control parameters in different conditions is presented in this paper, for reducing the gap effect when the direction of the axial load is changed. This method effectively reduces the load response time to meet the technical requirements of the test rig.

scholarly journals Fractional-Order PID Control Strategy on Hydraulic-Loading System of Typical Electromechanical Platform

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 3024 ◽  
Author(s):  
Ning Wang ◽  
Jianmei Wang ◽  
Zhixiong Li ◽  
Xuefeng Tang ◽  
Dingbang Hou
Keyword(s):  
Fractional Order ◽  
Pid Controller ◽  
Control Method ◽  
Model Parameters ◽  
Test Rig ◽  
Control Effect ◽  
Hydraulic Loading ◽  
Loading System ◽  
Fractional Order Pid ◽  
Fractional Order Pid Controller

In this paper, a control method for a hydraulic loading system of an electromechanical platform based on a fractional-order PID (Proportion-Integration-Differentiation) controller is proposed, which is used to drive the loading system of a mechatronic journal test rig. The mathematical model of the control system is established according to the principle of the electro-hydraulic system. Considering the indetermination of model parameters, the method of parameter identification was used to verify the rationality of the theoretical model. In order to improve the control precision of the hydraulic loading system, the traditional PID controller and fractional-order PID controller are designed by selecting appropriate tuning parameters. Their control performances are analyzed in frequency domain and time domain, respectively. The results show that the fractional-order PID controller has better control effect. By observing the actual control effect of the fractional-order PID controller on the journal test rig, the effectiveness of this control algorithm is verified.

scholarly journals A TEST RIG FOR DYNAMIC EVALUATION OF OFF - ROAD TIRES CHARACTERISTICS

1997 ◽  
Vol 7 (ASAT CONFERENCE) ◽  
pp. 1-11
Author(s):  
Yehia Hossamel-deen ◽  
Mohamed El-Haddad ◽  
Shawky Hagar
Keyword(s):  
Test Rig ◽  
Dynamic Evaluation
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