Open AccessDefining Dynamic Characteristics of Multilink Pendulum System with Comparison of the Calculated and Experimental Results
Author(s) -
Vladimir Gribkov,
Alexey Khokhlov
Publication year - 2014
Publication title -
nauka i obrazovanie
Language(s) - English
Resource type - Journals
ISSN - 1994-0408
DOI - 10.7463/0915.0789404
Subject(s) - pendulum , control theory (sociology) , computer science , mathematics , artificial intelligence , engineering , mechanical engineering , control (management)
We consider the multilink pendulum system consisting of six physical pendulums. A pendulum (carrier) has inertia parameters, which significantly exceed the remaining (carried) ones placed on the carrier. In addition to the system under analysis, in particular, the paper presents a design scheme for a two-stage liquid fuel rocket using pendulums as the analogues of fluctuating fuel. Pendulum models also find application to solve problems of stabilization of space tether systems. The objective of the study is to determine dynamic characteristics of the said sixmembered pendulum system, as well as to identify specific dynamic properties inherent in objects of this kind. Dynamic characteristics of the system are determined by calculations. A physical model of the pendulum allowed us to compare the calculated and experimental results. To conduct the frequency tests of the pendulum model three pilot units have been created. The first two units turned out to be inappropriate for fulfilling the experimental tasks for various reasons. The third unit enabled us to obtain desirable experimental results. The "calculation–experiment” discrepancy on the natural frequencies of the pendulum model for the majority of frequencies was less than 5%. We analyzed the dynamic features of multilink pendulum systems "carried by the carrier unit links". The analysis results are applicable to the above-noted object classes of rocket and space technology