A Multi segment Morphing System for a Micro Air Vehicle using Shape Memory Alloy Actuators

  • Kamalakannan G.M. CSIR-National Aerospace Laboratories, Bengaluru - 560 017 https://orcid.org/0000-0001-9110-2958
  • Giresh Kumar Singh CSIR-National Aerospace Laboratories, Bengaluru - 560 017
  • C.M. Ananda CSIR-National Aerospace Laboratories, Bengaluru - 560 017
Keywords: Multi-segmentmorphing, Adaptive control allocation, Leading edge drooping, Time-staggered control, Multiple shape memory alloy tracking control, Pulse frequency and pulse width control, Drooping angle control, Micro air vehicle, MAV

Abstract

A configurable multi-segment morphing system for a micro air vehicle (MAV) is presented in this study. One of the novelties is the development of an adaptive control allocation algorithm that provides fast, simultaneous and independent operation of four morphing segments using shape memory alloy (SMA) actuators. The SMA operation is time-staggered in microsecond resolution to ensure that only one SMA draws power from the MAV battery at a time. The other novelties are the in-flight measurement of morphing angle using dual flex-sensors and morphing of leading edges such that the ‘morphing-line’ is diagonal (45º) to the MAV’s lateral axis. The system was implemented on an open source autopilot controller and operated using the MAV battery. It was ground-tested under propeller ON conditions and a droop rate of 35º/s and ability to track a 1 Hz sinusoidal variation of droop angle were realised.

Author Biographies

Kamalakannan G.M., CSIR-National Aerospace Laboratories, Bengaluru - 560 017

Mr G.M. Kamalakannan has MTech in Electronics Engineering. from VTU where he his currently pursuing PhD. He is currently a Senior Principal Scientist at CSMST. He has experience in the design, development and commercialisation of electronics, control and instrumentation systems and application software for aerospace composites process equipment, which include aerospace grade autoclave, multi zone hot bonder, automated resin infusion system. He has also lead a NPMASS project on morphing wing micro air vehicle.

Giresh Kumar Singh, CSIR-National Aerospace Laboratories, Bengaluru - 560 017

Dr Giresh Kumar Singh has BTech and MTech (Aerospace Engg.) and PhD (Electrical Engg.) from IIT-Kanpur. He is working as a Senior Principal Scientist in the Flight Mechanics & Control Division of CSIR-NAL. He has been involved in the design, development, and testing of flight control laws for civil and military manned aircraft as well as unmanned aerial vehicles for civilian and strategic applications. His Research Interest include: Flight dynamics of aerial vehicles, design of flight control algorithms and optimisation.

C.M. Ananda, CSIR-National Aerospace Laboratories, Bengaluru - 560 017

Dr Ananda CM did his PhD in embedded avionics. He is working as a Chief Scientist and Head of Aerospace Electronics and Systems Division of CSIR-NAL. He has to his credit number of awards for excellent project execution of various projects, NAL Technology shield award and many more. He has 9 journal publications and 28 conference publications along with one book chapter.

Published
2020-02-10
How to Cite
G.M., K., Singh, G., & Ananda, C. (2020). A Multi segment Morphing System for a Micro Air Vehicle using Shape Memory Alloy Actuators. Defence Science Journal, 70(1), 3-9. https://doi.org/10.14429/dsj.70.14145
Section
Aeronautical Systems