Lateral stability of gliding parachutes

Crimi, Peter

doi:10.2514/3.20579

Cited by 16 publications

(6 citation statements)

References 1 publication

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“…There is a large body of work on different methods of parafoil dynamic modeling. The simplest approach is to model the entire parafoil and payload aircraft as a rigid body and decouple the longitudinal and lateral dynamics to obtain a reduce order model [31][32][33]. Although these reduced order models can provide insight into a particular aspect of parafoil flight dynamics, it is necessary to model the full set of rigid body states in order to provide a realistic environment to test lateral and longitudinal guidance and control algorithms [34,35].…”

Section: Simulationmentioning

confidence: 99%

Adaptive Glide Slope Control for Parafoil and Payload Aircraft

Ward

2013

Journal of Guidance, Control, and Dynamics

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Section: Simulationmentioning

confidence: 99%

Adaptive Glide Slope Control for Parafoil and Payload Aircraft

Ward

2013

Journal of Guidance, Control, and Dynamics

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“…Crimi used a 3-DoF model (lateral channel only) to determine the relationship of aerodynamic and inertial parameters to lateral stability characteristics. 28 He represented the system by a rigid wing with a suspended payload in a steady glide and analytically prescribed stability boundary for spiral divergence. His calculations showed that there is a minimum effective anhedral angle required for absolute stability.…”

Section: B First Modeling Effortsmentioning

confidence: 99%

On the Development of a Scalable 8-DoF Model for a Generic Parafoil-Payload Delivery System

Yakimenko

2005

18th AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar

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The paper presents an initial move to develop a scalable high-degree-of-freedom model of the parafoilpayload system. The intention is to develop the tool capable of: i) determining basic system's geometry parameters by observing the video data of the real descend, ii) readjusting the nominal aerodynamic and control coefficients incorporated into the well-established equations of motions, and iii) performing model identification to tune numerous relative variables to achieve the best fit with the real drop data if available. Since in the certain way such a tool would represent some kind of generalization of the modeling efforts undertaken so far, the present paper starts from a comprehensive review of publications devoted to the modeling of parafoil-payload systems. The paper then briefly addressed the current stage of the development of a scalable model. In anticipation of real drop data to validate the approach paper ends with conclusions.

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“…Theoretical studies were carried out to investigate the performance of gliding parachutes (20)(21)(22) . In addition, several studies on the longitudinal and lateral stability characteristics of gliding parachutes performed in which the effects of varying significant design parameters on the static or dynamic stability were investigated (23)(24)(25)(26) . Nowadays, there are many canopies, basically designed for personnel applications.…”

Section: Introductionmentioning

confidence: 99%

A novel algorithm for conceptual design and optimisation of an affordable gliding airdrop platform using TCOMOGA

Nosratollahi

Ghapanvary

2018

Aeronaut. j.

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Unlike conventional ballistic parachutes, gliding parachutes have been extensively used as guided precision aerial delivery system (GPADS) platforms in recent years. The reasoning may be found in gliding and manoeuvering capabilities, which make this kind of ram-air parachutes superior for precision aerial delivery application. In contrast, wing-shaped configuration along with more design variables create a cumbersome design procedure for this type of parachute. Especially, when an affordable configuration is demanded, the design procedure will be a more important problem. In this respect, an innovative integrated design framework is proposed in which significant design aspects are considered so that the gliding parachute configuration can be optimiseoptimised through a bi-objective optimisation problem to find optimum cost for achievable gliding ranges. To do so, the configuration is defined with minimum required parameters and design space is constrained by performance and stability as significant design requirements to guarantee the feasibility of the solutions in practice. The objective functions are defined in terms of gliding characteristics and amount of materials for fabrication which are representative for maximum reachable stand-off distance and unit cost, respectively. As an effective numerical optimisation method, a niched multi-objective genetic algorithm (MOGA) is used to generate a pareto-optimal set for a specific payload mass whereas constraints are handled through a tournament selection process. Based on results, the provided pareto front can aid the designers in decision-making and trade-off between demanded objectives for a payload weight. The underlying design problem is solved using an all-at-once (AAO) approach and the design loop converges to favourable results in a reasonable time. Finally, as a comparative study, an optimiseoptimised affordable cargo parachute is proposed for the GPADS application in which the material cost is reduced by at least 25% with respect to an available low-cost gliding parachute with the same glide ratio.

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Lateral stability of gliding parachutes

Cited by 16 publications

References 1 publication

Adaptive Glide Slope Control for Parafoil and Payload Aircraft

Adaptive Glide Slope Control for Parafoil and Payload Aircraft

On the Development of a Scalable 8-DoF Model for a Generic Parafoil-Payload Delivery System

A novel algorithm for conceptual design and optimisation of an affordable gliding airdrop platform using TCOMOGA

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