Experimental Analysis of One-Degree-of-Freedom (1DoF) Dynamic System Controlled by Optimized Inverted Pendulum

2020 ◽  
Vol 8 (3) ◽  
pp. 471-481
Author(s):  
Diogo V. Resende ◽  
Marcus V. G. de Morais ◽  
Suzana M. Avila
Keyword(s):  
Dynamic System ◽  
Experimental Analysis ◽  
Inverted Pendulum ◽  
Degree Of Freedom

A Convenient Way of Taking Wing (and Fuselage) Flexibility into Account in Calculating Undercarriage Loads

1968 ◽  
Vol 72 (688) ◽  
pp. 353-355
Author(s):  
D. Williams
Keyword(s):  
Dynamic System ◽  
Ab Initio ◽  
Normal Modes ◽  
Degree Of Freedom ◽  
Concentrated Mass ◽  
Natural Approach ◽  
Non Linear ◽  
Lumped Masses

The crudest way of taking account of the airframe superstructure in calculating undercarriage performance is to represent it by a single concentrated mass. Crude as this method is, it is often used by aircraft firms because the only alternative known to them, apparently, is something they hesitate to face. And no wonder, because it means having to represent the wing-fuselage system by a large number of lumped masses and springs, each of which means an extra degree of freedom. This complicated dynamic system has then to be integrated with the undercarriage system, itself complicated by its non-linear characteristics. The natural approach that suggests itself is not to consider the w/f (wing-fuselage) structure ab initio but to make use of its (usually known) normal modes and frequencies. But this is just what cannot be done by existing techniques—hence the present impasse.

Application on Two Degree of Freedom Model Driven PID in Liner First-Order Inverted Pendulum

2013 ◽  
Vol 433-435 ◽  
pp. 1000-1004
Author(s):  
Jing Jing Shi ◽  
Li Xiang Zhang ◽  
Ai Qin Jiang
Keyword(s):  
Control System ◽  
Pid Control ◽  
Inverted Pendulum ◽  
Degree Of Freedom ◽  
Control Technology ◽  
Pendulum System ◽  
First Order ◽  
Model Driven ◽  
Inverted Pendulum System ◽  
Two Degree Of Freedom

The inverted pendulum system is a high order, strong coupling, multi-variable and absolutely unstable nonlinear system. Its optimal control has been the hotspot in the field of study. A new two degree of freedom model driven PID control system is introduced in this paper.It will state the structure of the control technology and design steps.The control technology is applied to control linear inverted pendulum in this paper. The simulation results prove that two degree of freedom model driven PID control system has the feasibility and superiority.

Experimental Analysis and Testing of the Hemming Process Types Utilized in the Automotive Industry

2018 ◽  
Author(s):  
Pablo Alberto Limon-Leyva ◽  
Pedro de Jesús García-Zugasti ◽  
Antonio de J. Balvantín-García ◽  
José A. Diosdado de la Peña ◽  
Isidro de Jesus Sanchez-Arce ◽  
...  
Keyword(s):  
Automotive Industry ◽  
Experimental Analysis ◽  
Hydraulic Press ◽  
Degree Of Freedom ◽  
Aluminum Sheet ◽  
Custom Made ◽  
Geometric Variables ◽  
Tool Position ◽  
Three Degree Of Freedom

A comparative experimental analysis of three common hemming processes used in the automotive industry is presented. These processes are die hemming, table hemming, and roll hemming. We aim to determine which one of the three processes provides the better quality hemming. The die hemming and table hemming used in this study were performed with custom made tooling and a 35 tonne hydraulic press. Similarly, roll hemming was performed using a custom made workbench with a three-degree of freedom system of rolls. The material used for testing was aluminum sheet (6011); three rolling directions were taken in account: 0°, 45°, and 90° for the manufacture of the samples. Hemming quality was determined from the geometric variables such as: lip high, pre-hemming angle, tool position, roll radius (roll hemming only). As a result, the comparison of roll in/out and wrinkle defects are reported and compared.

scholarly journals Competitive energy transfer between a two degree-of-freedom dynamic system and an absorber with essential nonlinearity

2010 ◽  
Vol 62 (3) ◽  
pp. 573-592 ◽  
Author(s):  
Thanh Tung Pham ◽  
Stéphane Pernot ◽  
Claude Henri Lamarque
Keyword(s):  
Energy Transfer ◽  
Dynamic System ◽  
Degree Of Freedom ◽  
Two Degree Of Freedom
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