H∞ Control-Based Robust CAS Design for QTW-UAV via the Multiple-Model Approach with Particle Swarm Optimization

Quad-Tilt-Wing (QTW) Unmanned Aerial Vehicle (UAV) is one of the promising types of UAVs because of its high-speed cruise performance similar to fixed-wing aircraft and VTOL (Vertical TakeOff and Landing) ability like helicopters. The control performance of our previously designed Control Augmentati...

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Main Authors: Chiramathe Nami, Koichi Oka, Masayuki Sato, Akinori Harada, Koji Muraoka
Format: Article
Language:English
Published: Wiley 2019-01-01
Series:International Journal of Aerospace Engineering
Online Access:http://dx.doi.org/10.1155/2019/9267059
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author Chiramathe Nami
Koichi Oka
Masayuki Sato
Akinori Harada
Koji Muraoka
author_facet Chiramathe Nami
Koichi Oka
Masayuki Sato
Akinori Harada
Koji Muraoka
author_sort Chiramathe Nami
collection DOAJ
description Quad-Tilt-Wing (QTW) Unmanned Aerial Vehicle (UAV) is one of the promising types of UAVs because of its high-speed cruise performance similar to fixed-wing aircraft and VTOL (Vertical TakeOff and Landing) ability like helicopters. The control performance of our previously designed Control Augmentation System (CAS) for the aircraft was not satisfactory due to the oscillatory motions in flight tests. This paper thus presents an H∞ control-based robust CAS design for QTW-UAV via multiple-model approach with Particle Swarm Optimization (PSO) to suppress the oscillatory motions. Although the adoption of the multiple-model approach to obtain robust CAS gains is the same as in our previous design, our new method has two unique features in contrast to the previously used method, that is, the design requirement for CAS gains is given in the frequency domain to shape the frequency responses from attitude command to attitude error and PSO is used to reduce the numerical complexity coming from a brute-force method, i.e., the gridding method. The overall control performance of the designed CAS gains is examined by human-in-the-loop nonlinear flight simulations. As an extension of the proposed method, we consider the situation in which uncertainty models with different probabilistic densities should be incorporated into the nominal model and show that the nominal performance can be improved at the expense of slight performance degradation for the models with small probabilistic density.
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publishDate 2019-01-01
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series International Journal of Aerospace Engineering
spelling doaj-art-1e1ad27cc127430e9c8db534b06ada2b2025-08-20T02:01:40ZengWileyInternational Journal of Aerospace Engineering1687-59661687-59742019-01-01201910.1155/2019/92670599267059H∞ Control-Based Robust CAS Design for QTW-UAV via the Multiple-Model Approach with Particle Swarm OptimizationChiramathe Nami0Koichi Oka1Masayuki Sato2Akinori Harada3Koji Muraoka4Department of Intelligent Mechanics and Aerospace Control, Kochi University of Technology, Kochi 782-0003, JapanDepartment of Intelligent Mechanics and Aerospace Control, Kochi University of Technology, Kochi 782-0003, JapanJapan Aerospace Exploration Agency, Mitaka, Tokyo 181-0015, JapanDepartment of Intelligent Mechanics and Aerospace Control, Kochi University of Technology, Kochi 782-0003, JapanJapan Aerospace Exploration Agency, Mitaka, Tokyo 181-0015, JapanQuad-Tilt-Wing (QTW) Unmanned Aerial Vehicle (UAV) is one of the promising types of UAVs because of its high-speed cruise performance similar to fixed-wing aircraft and VTOL (Vertical TakeOff and Landing) ability like helicopters. The control performance of our previously designed Control Augmentation System (CAS) for the aircraft was not satisfactory due to the oscillatory motions in flight tests. This paper thus presents an H∞ control-based robust CAS design for QTW-UAV via multiple-model approach with Particle Swarm Optimization (PSO) to suppress the oscillatory motions. Although the adoption of the multiple-model approach to obtain robust CAS gains is the same as in our previous design, our new method has two unique features in contrast to the previously used method, that is, the design requirement for CAS gains is given in the frequency domain to shape the frequency responses from attitude command to attitude error and PSO is used to reduce the numerical complexity coming from a brute-force method, i.e., the gridding method. The overall control performance of the designed CAS gains is examined by human-in-the-loop nonlinear flight simulations. As an extension of the proposed method, we consider the situation in which uncertainty models with different probabilistic densities should be incorporated into the nominal model and show that the nominal performance can be improved at the expense of slight performance degradation for the models with small probabilistic density.http://dx.doi.org/10.1155/2019/9267059
spellingShingle Chiramathe Nami
Koichi Oka
Masayuki Sato
Akinori Harada
Koji Muraoka
H∞ Control-Based Robust CAS Design for QTW-UAV via the Multiple-Model Approach with Particle Swarm Optimization
International Journal of Aerospace Engineering
title H∞ Control-Based Robust CAS Design for QTW-UAV via the Multiple-Model Approach with Particle Swarm Optimization
title_full H∞ Control-Based Robust CAS Design for QTW-UAV via the Multiple-Model Approach with Particle Swarm Optimization
title_fullStr H∞ Control-Based Robust CAS Design for QTW-UAV via the Multiple-Model Approach with Particle Swarm Optimization
title_full_unstemmed H∞ Control-Based Robust CAS Design for QTW-UAV via the Multiple-Model Approach with Particle Swarm Optimization
title_short H∞ Control-Based Robust CAS Design for QTW-UAV via the Multiple-Model Approach with Particle Swarm Optimization
title_sort h∞ control based robust cas design for qtw uav via the multiple model approach with particle swarm optimization
url http://dx.doi.org/10.1155/2019/9267059
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