Modeling of Elastic-Flexible Cables with Time-Varying Length for Cable-Driven Parallel Robots

2019 ◽  
pp. 295-306 ◽  
Author(s):  
Philipp Tempel ◽  
Dongwon Lee ◽  
Felix Trautwein ◽  
Andreas Pott
Keyword(s):  
Parallel Robots ◽  
Time Varying ◽  
Varying Length ◽  
Flexible Cables

Transverse vibration of flexible hoisting rope with time-varying length

2014 ◽  
Vol 28 (2) ◽  
pp. 457-466 ◽  
Author(s):  
Ji-hu Bao ◽  
Peng Zhang ◽  
Chang-Ming Zhu ◽  
Wei Sun
Keyword(s):  
Transverse Vibration ◽  
Time Varying ◽  
Varying Length ◽  
Flexible Hoisting Rope

Free Vibration Energy and Period of a String With Time-Varying Length

2000 ◽  
Author(s):  
Seung-Yop Lee
Keyword(s):  
Free Vibration ◽  
Traveling Waves ◽  
Moving Boundary ◽  
String Tension ◽  
New Technique ◽  
Vibration Energy ◽  
Time Varying ◽  
Constant Rate ◽  
Varying Length ◽  
A New Technique

Abstract We introduce a new technique to analyze free vibration energy and natural frequencies of a string with time-varying length by dealing with traveling waves. One of boundaries is vertically fixed but it moves axially at a constant rate. When the string length is varied, the free vibration energy and period also change with time. String tension and non-zero instantaneous vertical velocity at the moving boundary results in the energy variation. When the string undergoes retraction, the vibration energy increases with time. The new technique using traveling waves gives the exact amount of energy transferred into the vibrating system at the moving boundary. The free vibration energy are compared with previous results using the perturbation method and Kotera’s approach.

Non-linear dynamic analysis of time varying length flexible body

2020 ◽  
Vol 2020 (0) ◽  
pp. 513
Author(s):  
Masato TAKEUCHI ◽  
Kensuke HARA ◽  
Hiroshi YAMAURA
Keyword(s):  
Dynamic Analysis ◽  
Flexible Body ◽  
Time Varying ◽  
Linear Dynamic ◽  
Non Linear ◽  
Varying Length

Non-Linear Modal Interactions in a Suspension Rope System with Time-Varying Length

2006 ◽  
Vol 5-6 ◽  
pp. 217-224 ◽  
Author(s):  
Rodanthi Salamaliki-Simpson ◽  
Stefan Kaczmarczyk ◽  
Phil Picton ◽  
Scott Turner
Keyword(s):  
Dynamic Response ◽  
Equations Of Motion ◽  
Time Varying ◽  
Modal Interaction ◽  
Modal Interactions ◽  
Autoparametric Resonance ◽  
Non Linear ◽  
Varying Length ◽  
Host Structure ◽  
Rope System

This paper focuses on the investigation of the autoparametric coupling effects and modal interactions in a suspension rope system with a time varying length. Equations of motion of a multi-degree-of-freedom discrete, non-stationary and non-linear model are presented and are used to analyze the dynamic response of an elevator suspension rope system under resonance conditions. The equations of motion involve quadratic and cubic non-linear terms which are responsible for the modal interaction between the lateral and longitudinal oscillations of the rope and the car motions. The model takes into account the periodic excitations caused by motion of the host structure. The results confirm that adverse responses may arise and internal autoparametric resonance phenomena may occur.

DC Circuit Model of TiO2-based Memristors

2015 ◽  
Vol 24 (03n04) ◽  
pp. 1550004
Author(s):  
Anas Mazady ◽  
Mehdi Anwar
Keyword(s):  
Circuit Model ◽  
The State ◽  
Device Physics ◽  
Time Varying ◽  
State Equations ◽  
Material Combination ◽  
Switching Mechanism ◽  
State Variable ◽  
Varying Length

DC circuit model of TiO2 memristors is developed based on the reported I-V data. The method described can easily be implemented to realize memristor based circuitries that serve different application platforms fabricated using any material combination. The time varying length of conductive filaments inside memristor, responsible for the observed switching mechanism, is implemented as the state variable and the state equations are modified accordingly. Once the device physics is taken into account the circuit model can be further adapted to predict the behavior of memristor with altered dimensions.

Sign in / Sign up

Export Citation Format

Share Document