IJERT-EMS
IJERT-EMS

A Transfer Function Model of Thrust Dynamics for Multi-Rotor Helicopters


A Transfer Function Model of Thrust Dynamics for Multi-Rotor Helicopters
Authors : Myunggon Yoon
Publication Date: 02-01-2016

Authors

Author(s):  Myunggon Yoon

Published in:   International Journal of Engineering Research & Technology

License:  This work is licensed under a Creative Commons Attribution 4.0 International License.

Website: www.ijert.org

Volume/Issue:   Volume. 5 - Issue. 01 , January - 2016

e-ISSN:   2278-0181

Abstract

This paper proposes a transfer function model for a dynamic thrust of a motor-driven propeller widely used for small multi-rotor helicopters. From frequency responses of a propeller speed with respect to a PWM (pulse width modulation) duty ratio of a motor speed controller, it is found that a thrust dynamics can be accurately modelled as a first-order transfer function. This frequency-domain result is compared to a time-domain method which is based on a step response of a thrust.

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