Numerical and experimental investigation of deployment behaviour of folded fin mechanism based on the dynamic loading conditions


Avci M., Taga O., Keleş Ö.

JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, vol.37, no.3, pp.1689-1702, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 37 Issue: 3
  • Publication Date: 2022
  • Doi Number: 10.17341/gazimmfd.902998
  • Journal Name: JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Art Source, Compendex, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.1689-1702
  • Keywords: Folded mechanism, Friction coefficient, Multi body dynamics, Design of experiment, SYSTEM, SIMULATION, CLEARANCE, DESIGN
  • Gazi University Affiliated: Yes

Abstract

In this study, the friction and damping values that arise during the deployment of the folded fin mechanism were obtained according to the experimental data. Although there are recommended values for friction in the literature, damping is a phenomenon that varies from system to system and must be obtained through test data. In this study, firstly, the mechanism was operated on the test device with a specific enclosed volume drive pressure and the actual drive pressure generated in the system was measured. The dynamic behavior of the mechanism was recorded by a High-Speed camera system as well. Adams MBD (multi body dynamics) was used to define the mechanism model and drive pressure data from the test was defined as input to the model. With the help of Adams DOE (design of experiments), certain intervals were defined for friction and damping values. Multiple analyses were carried out at the defined friction and damping intervals and total deployment time of the mechanism and the dynamic behaviors that mechanism exhibited during deployment were obtained. Friction and damping values were obtained from the numerical results which have the highest correlation with the Test-C. The same mechanism was tested for different drive pressures with the specified friction and damping values and the test results were compared with the numerical models. Finally it was decided that the friction and damping values determined with this working method could be used in future numerical analyses of gas powered mechanisms.