Next Article in Journal
Filtered BERT: Similarity Filter-Based Augmentation with Bidirectional Transfer Learning for Protected Health Information Prediction in Clinical Documents
Next Article in Special Issue
Investigation of Controllable Modes in Active Vibration Cancellation Induced by Piezoelectric Patches
Previous Article in Journal
Detecting Change between Urban Road Environments along a Route Based on Static Road Object Occurrences
 
 
Article

Semi-Active Control for a Helicopter with Multiple Landing Gears Equipped with Magnetorheological Dampers

School of Aerospace and Mechanical Engineering, Korea Aerospace University, Goyang-si 10540, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Lucyna Leniowska
Appl. Sci. 2021, 11(8), 3667; https://doi.org/10.3390/app11083667
Received: 24 March 2021 / Revised: 14 April 2021 / Accepted: 16 April 2021 / Published: 19 April 2021
(This article belongs to the Special Issue Sensors, Actuators and Methods in Active Noise and Vibration Control)
Due to their extensive use in various applications, helicopters need to be able to land in a variety of conditions. Typically, a helicopter landing gear system with skids or passive wheel-dampers is designed based on only one critical touchdown condition. Thus, this helicopter landing gear system may not perform well in different landing conditions. A landing gear system with magnetorheological (MR) dampers would be a promising candidate to solve this problem. However, a semi-active controller must be designed to determine the electrical current applied to the MR damper to directly manage the damping force. This paper presents a new skyhook controller, called the skyhook extended controller, for a helicopter with multiple landing gears equipped with MR dampers to reduce the helicopter’s acceleration at the center of gravity in off-normal landing attitude conditions. A 9-DOF simulation model of a helicopter with multiple MR landing gears was built using RECURDYN. To verify the effectiveness of the proposed controller, co-simulations were executed with RECURDYN and MATLAB in different initial pitch and roll angles at touchdown. The main simulation results show that the proposed controller can greatly decrease the peak and rms acceleration of the helicopter’s center of gravity compared to a traditional skyhook controller and passive damper. View Full-Text
Keywords: helicopter landing systems; magnetorheological damper; skyhook control; semi-active control; skyhook extended control helicopter landing systems; magnetorheological damper; skyhook control; semi-active control; skyhook extended control
Show Figures

Figure 1

MDPI and ACS Style

Luong, Q.V.; Jang, D.-S.; Hwang, J.-H. Semi-Active Control for a Helicopter with Multiple Landing Gears Equipped with Magnetorheological Dampers. Appl. Sci. 2021, 11, 3667. https://doi.org/10.3390/app11083667

AMA Style

Luong QV, Jang D-S, Hwang J-H. Semi-Active Control for a Helicopter with Multiple Landing Gears Equipped with Magnetorheological Dampers. Applied Sciences. 2021; 11(8):3667. https://doi.org/10.3390/app11083667

Chicago/Turabian Style

Luong, Quoc Viet, Dae-Sung Jang, and Jai-Hyuk Hwang. 2021. "Semi-Active Control for a Helicopter with Multiple Landing Gears Equipped with Magnetorheological Dampers" Applied Sciences 11, no. 8: 3667. https://doi.org/10.3390/app11083667

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop