Conceptual Design of Stratospheric Airships Focusing on Energy Balance

Yang, X. H.; Liu, Duoneng

doi:10.1061/(asce)as.1943-5525.0000814

Cited by 31 publications

(11 citation statements)

References 20 publications

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“…The atmospheric environment of stratosphere is more stable than that of troposphere, so there should be sensitive control system including telemetries and actuators installed on to response accurately, quickly to the change of the environment [22]. Because of the sensitiveness of airship weight and low thrust, the energy configuration is very close to the theoretical level [23].…”

Section: Differences Between Stratospheric and Traditional Airshipmentioning

confidence: 99%

The Mechanical Characteristics and Experimental Study of the Stratospheric Airship

Xu¹,

Liu²,

Pan³

2021

JAMP

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Stratospheric airship is a special near-space air vehicle which has lots of advantages than other traditional flying aircrafts, such as long endurance, strong survival ability, low cost, excellent resolution detector etc. In addition, the stratospheric airship can be an ideal stratospheric bearing platform. This paper firstly gave an overview describing some technical differences between the stratospheric airship and the traditional airship, including the working environment, design specifications, structure characteristics, energy system, flying modes, and so on. Some technical difficulties including the materials, power system which apply to the stratospheric airship and deformation of the huge hull, super-heating effect, and station-keeping were discussed. Furthermore, technical target, technical specifications, design concept, and overview of flying tested about two stratospheric demonstration airships which were representative achievements of the research on the stratospheric airship in China were introduced. Finally, the predictions about the progress and direction of development were discussed.

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Section: Differences Between Stratospheric and Traditional Airshipmentioning

confidence: 99%

The Mechanical Characteristics and Experimental Study of the Stratospheric Airship

Xu¹,

Liu²,

Pan³

2021

JAMP

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“…It is worthwhile noting that N increases with the performance simulation time tsim increasing. Based on the sample sets [Xj,fj(ti)](j=1,2,…,2m,i=1,2,…N), an approximate model f^i(X) is constructed using the radial basis function (RBF) 21–23 for each time node. The thrust versus time performance curve f(tsim)can be presented by the N approximate models.…”

Section: Progressive Matching Optimization Approachmentioning

confidence: 99%

Solid rocket motor design employing an efficient performance matching approach

Wang

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part G:

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Solid rocket motor design matching the thrust requirement of the overall vehicle has become an exigent task. In the present research, an efficient performance matching optimization approach is proposed and applied to the solid rocket motor design. To obtain reliable solid rocket motor designs, refined performance evaluation is accomplished successfully based on the coupling of the level set grain burnback analysis and one-dimensional ballistic simulation by the time-stepping algorithm. Due to the heavy computing burden of the coupled performance solver, a novel progressive matching optimization approach is proposed. This approach depends on partial but not full-burn thrust profile to eliminate inferior candidates, predict superior candidates, advance the simulation and drive the candidates converging to the specified performance. Validation of the proposed solid rocket motor design approach is carried out by two test cases possessing different thrust requirements, and results indicate that the proposed approach is practical and efficient.

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“…The optimal trajectory problem, which was transformed into an optimal control problem by Blouin et al, 14 was solved using a pseudospectral method. Based on dynamic model and kinetic model of stratospheric airship, Yang and colleagues 15,16 evaluated the power consumption of stratospheric airship and proposed a model predictive control method for the trajectory control. Guo et al 17 presented a simultaneous trajectory planning and tracking controller for use under cruise conditions based on a model predictive control (MPC).…”

Section: Introductionmentioning

confidence: 99%

Trajectory optimization and control of stratospheric airship in cruising

Zhu

Yang

Deng

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part I:

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Stratospheric airships are important platforms for near-space enduring cruising capability for several applications. Since energy shortage is one of major limiting factors in stratospheric airship, it is crucial to develop novel methods to reduce the requirement on energy systems. In this article, optimal trajectory of stratospheric airship in gradient wind fields is investigated in order to reduce energy consumption. First, polynomial expressions for wind gradients are assumed, and three-dimensional point mass airship equations of motion are used. Then the variety characters of energy for stratospheric airship are studied, the minimum power output of power system is taken as the optimizing target, and collocation approach is used to convert the trajectory optimization problem into parameters optimization. The characters of stratospheric airship’s cruising in three typical wind field are analyzed, including control and state parameters time histories, power changes for airship system, and so on. This research work shows that the greater the wind gradient, the more favorable to reduce energy consumptions, but the speed of the gradient wind cannot be too high.

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Conceptual Design of Stratospheric Airships Focusing on Energy Balance

Cited by 31 publications

References 20 publications

The Mechanical Characteristics and Experimental Study of the Stratospheric Airship

The Mechanical Characteristics and Experimental Study of the Stratospheric Airship

Solid rocket motor design employing an efficient performance matching approach

Trajectory optimization and control of stratospheric airship in cruising

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