Iranian Journal of Mechanical Engineering Transactions of ISME

Iranian Journal of Mechanical Engineering Transactions of ISME

Functional Investigation of the Semi-active Control System in Damping the Vibrations of the Helicopter Engine

Authors
M. Abolfazl Mokhtari 1
Alireza Shahi 2
Meysam Jalalvand 3
1 Associated professor, Flight & Engineering Department, Imam Ali University, Tehran, Iran
2 Aerospace Engineering Department, Malek Ashatar university of technologyT tehran
3 Iranian Army Aviation Research deputy,Tehran
10.30506/ijmep.2024.2012570.1957
Abstract
In this article, the use of vibration absorbers to dampen the vibrations created by the helicopter engine has been described. During their flight mission, helicopters are affected by many vibrations, which can be considered as one of the most important sources of vibrations in helicopters, which cause different and intense dynamic environments such as the effects of vibrations with sinusoidal input and step and triangle to the helicopter, in between, the vibration environment with sinusoidal input has the main contribution in destroying and weakening the overall performance of the helicopter and the possible failure of the flight mission. By using the design of the damper system of the article, which is actually a combination of active absorbers with LQR PID algorithm and passive, which, at low frequencies, the active control function and its combination with the elastomeric base absorber is 20% more optimal than the passive absorber and 10 % is more optimal than the active absorber and since the helicopter engine is subjected to various vibrations with a high vibration amplitude during its flight mission, the designed system significantly reduces the generated vibrations and up to 96% of these vibrations in It will dampen the average performance of the engine and in different working conditions.                                                                             
Keywords
Helicopter
Vibration absorber
Engine
Damper
Subjects
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  • Receive Date 01 October 2023
  • Revise Date 26 April 2024
  • Accept Date 01 July 2024