Wing-in-ground craft longitudinal modeling and simulation based on a moving wavy ground test

Wang, Lixin; Yang, Kun; Yue, Ting; Liu, Hailiang

doi:10.1016/j.ast.2022.107605

Cited by 7 publications

(2 citation statements)

References 23 publications

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“…The simulation of the longitudinal stability problem was advanced by [43,44], including some lateral stability. A recent Chinese advancement comprises developing an H∞ attitude controller that can accommodate the problem of the change of wave height, with advantages in lateral and directional stability [45]. However, as a caution, this research is based on a novel wind tunnel modelling of wavy ground, and further Chinese research has found that when h/c is low, there is a wind shear force that can cause the forthcoming wave crest to produce water spray with stability concerns [46].…”

Section: Future Iterationsmentioning

confidence: 99%

Conceptualising a Hybrid Flying and Diving Craft

Joiner

Swidan

2023

JMSE

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This paper introduces the conceptual design of a submersible seaplane that merges the maturity of the wing-in-ground (WIG or ekranoplan) crafts and seaplanes with covert hybrid underwater insertion, travel, and recovery. WIG crafts have a higher lift-to-drag ratio and thus improved endurance, while hybrid crafts have recently become feasible due to advances in materials, electric propulsion, and multi-medium computational fluid dynamics. The reconnaissance design can insert, loiter, and extract from underwater, surfaces if necessary; it can fly in or out of ground effect, keep watch on the sea surface while recharging, and travel underwater. This design minimizes Doppler and infrared signatures to evade the surface wave, backscatter radar systems, and cube satellite arrays typical in contested maritime areas. Five critical enabling technologies are overviewed, showing how they enable a conceptual design. This project was conducted in collaboration with two industrial partners, namely Ron Allum and Thales Australia. The conceptual design has been socialised and confirmed at technical conferences from each core discipline and partly confirmed by a recent Chinese design and testing of a similar hybrid uncrewed aerial vehicle (HUAV). Recommendations are made for improving the conceptual design before proof-of-concept prototype testing. Given the seminal nature of HUAV design and research and some of the unique innovations proposed, the lessons learned from this iteration will likely be significant to other designers and researchers.

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Section: Future Iterationsmentioning

confidence: 99%

Conceptualising a Hybrid Flying and Diving Craft

Joiner

Swidan

2023

JMSE

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“…Zou et al studied the effects of displacement and gravity longitudinal layouts on the performance of an aerodynamically alleviated trimaran in calm water by model towing test, and results show that moving the gravity center forward and increasing the mass can improve the longitudinal stability, which results in a higher resistance cost in the high-speed region [3]. Wang carried out the study of the WIG craft experimentally based on the moving wavy ground test, and found that the longitudinal characteristics of the vehicle were affected by the wave height and the wave height change rate [4].…”

Section: Introductionmentioning

confidence: 99%

Stability Analysis of the Ultra-high-speed Aerodynamically Alleviated Marine Vehicle in Waves

Song

2023

Preprint

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The ultra-high-speed aerodynamically alleviated marine vehicle (AAMV) is an unmanned surface vehicle (USV) with the advantages of fast speed, shallow draft, strong wind and wave resistance and long voyage, which fills the gap between high-speed aircrafts and low-speed surface vehicles. To explore the influence of waves on the motion characteristics of the ultra-highspeed AAMV, numerical research on stability of the ultra-high-speed AAMV at different speed and different sea states is carried out. The stability mathematical model of the ultra-high-speed AAMV is established based on the small disturbance linearization theory, and the stability of the vehicle is divided into longitudinal stability and lateral stability. Numerical results show that the ultra-high-speed AAMV shows good longitudinal and lateral stability at cruise speed. At the cruising phase, the pitch angle response, the roll angle response, and the heave response under sea state 5 are 0.210°, 0.0229° and 0.0734m, respectively. With the increase of speed, the aerodynamic force of the ultra-high-speed AAMV gradually increases, and the effect of aerodynamic alleviation is also enhanced accordingly, which greatly weakens the influence of waves on motions. The effect of aerodynamic alleviation can effectively improve the stability of the ultra-high-speed AAMV in waves.

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