Design and Testing of a Low-Order Flight Control System for Quad-Tilt-Wing UAV

Totoki, Hironori; Ochi, Yoshimasa; Sato, Masayuki; Muraoka, Koji

doi:10.2514/1.g001577

Cited by 9 publications

(3 citation statements)

References 12 publications

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“…Aviation Field. On the basis of researching related machine translation theory, using some existing resources and tools, we complete the phrase translation model module, realize the phrase-based statistical machine translation system, and introduce the basic working principle of the system, system implementation, and system operating environment settings and parameters [11,12].…”

Section: Implementing the Title Translation System In Thementioning

confidence: 99%

Design and Testing of Automatic Machine Translation System Based on Chinese-English Phrase Translation

Ning

Ban

2021

Mobile Information Systems

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With the development of linguistics and the improvement of computer performance, the effect of machine translation is getting better and better, and it is widely used. The automatic expression translation method based on the Chinese-English machine takes short sentences as the basic translation unit and makes full use of the order of short sentences. Compared with word-based statistical machine translation methods, the effect is greatly improved. The performance of machine translation is constantly improving. This article aims to study the design of phrase-based automatic machine translation systems by introducing machine translation methods and Chinese-English phrase translation, explore the design and testing of machine automatic translation systems based on the combination of Chinese-English phrase translation, and explain the role of machine automatic translation in promoting the development of translation. In this article, through the combination of machine translation experiments and machine automatic translation system design methods, the design and testing of machine automatic translation systems based on Chinese-English phrase translation combinations are studied to cultivate people's understanding of language, knowledge, and intelligence and then help solve other problems. Language processing issues promote the development of corpus linguistics. The experimental results in this article show that when the Chinese-English phrase translation probability table is changed from 82% to 51%, the BLEU translation evaluation system for the combination of Chinese-English phrases is improved. Automatic machine translation saves time and energy of translation work, which shows that machine translation shows its advantages due to its short development cycle and easy processing of large-scale corpora.

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Section: Implementing the Title Translation System In Thementioning

confidence: 99%

Design and Testing of Automatic Machine Translation System Based on Chinese-English Phrase Translation

Ning

Ban

2021

Mobile Information Systems

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“…Japan Aerospace Exploration Agency (JAXA) has been developing different prototypes of UAVs in QTW configuration, see e.g., the AKITSU [2] and McART3 [5,6] UAVs (see Figure 1 and Table 1). An attitude control law (namely, Stability and Control Augmentation System, SCAS) was designed, see [2] and references therein for details; the SCAS structure was fixed beforehand, leaving the controller gains as tunable parameters.…”

Section: Structured -Synthesis Of Robust Attitude Control Laws For Qu...mentioning

confidence: 99%

Structured μ-Synthesis of Robust Attitude Control Laws for Quad-Tilt-Wing Unmanned Aerial Vehicle

Panza¹,

Lovera²,

Sato³

et al. 2020

Journal of Guidance, Control, and Dynamics

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“…Sato and Muraoka have addressed the QTW problem and shown the effectiveness of the gainscheduled controllers to address the dynamic change in the aerodynamic characteristics on an actual QTW-UAV [12]- [14]. For The QTW-UAV, the controller design method has been continuously developed [15], [16]. In this study, a design method for structural parameters of the electric QTW-UAV is developed.…”

Section: Introductionmentioning

confidence: 99%

On Structural Parameter Optimization Method for Quad Tilt-Wing UAV Based on Indirect Size Estimation of Domain of Attraction

Yamaguchi

Hara

2022

IEEE Access

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To deal with the flexibility in the electric aircraft design, this study develops a structural parameter optimization method. The quad tilt-wing aircraft exhibits rotary-wing flight and fixed-wing flight modes by tilting its wings. This study focuses on the domain of attraction, which is a class of state vectors that converge to a static equilibrium point after infinite time. The method indirectly estimates the size of domain of attraction of an aircraft by calculating the radius of a sphere that is encompassed by the domain. In addition, after investigating the relationship between change in structural parameters and the size of the domain of attraction, the structural parameters that maximize the size of the domain are surveyed. The effectiveness of the proposed method is demonstrated for the optimization of the quad tilt-wing aircraft. The quad tilt-wing aircraft exhibits rotary-wing flight and fixed-wing flight modes by tilting its wings. As the characteristics of the dynamics of the quad tilt-wing aircraft demonstrate a significant nonlinear change depending on the tilt angle of the wing, we propose a method to optimize the structural parameters for an easy control of the aircraft. Simulation results show that the optimization scheme identifies the parameters that enable the aircraft to perform agile control to address a disturbance moment. Further, although the same controller is used in the original and optimized aircraft, the optimized aircraft can handle a disturbance in a shorter time when compared with the original aircraft.

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Design and Testing of a Low-Order Flight Control System for Quad-Tilt-Wing UAV

Cited by 9 publications

References 12 publications

Design and Testing of Automatic Machine Translation System Based on Chinese-English Phrase Translation

Design and Testing of Automatic Machine Translation System Based on Chinese-English Phrase Translation

Structured μ-Synthesis of Robust Attitude Control Laws for Quad-Tilt-Wing Unmanned Aerial Vehicle

On Structural Parameter Optimization Method for Quad Tilt-Wing UAV Based on Indirect Size Estimation of Domain of Attraction

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