Bifurcation Analysis of Parafoil-Payload System Flight Dynamics

Prakash, Om; Daftary, Avani; Ananthkrishnan, N.

doi:10.2514/6.2005-5806

Cited by 16 publications

(6 citation statements)

References 11 publications

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“…The use of bifurcation methods can provide parafoil designers with a systematic procedure to pick the best rigging angle and also predict the system performance and stability. Prakash et al 56,57 carried out bifurcation analysis for a parafoil-payload system using aerodynamic data for the parafoil in tabular form over a range of angles of attack from −10 to +80 deg. Their computed trim states (parafoil angle of attack, system glide angle) for various choices of rigging angle µ are reproduced in Fig.…”

Section: B Choice Of Rigging Angle For Parafoil-payload System Glidimentioning

confidence: 99%

Use of Bifurcation and Continuation Methods for Aircraft Trim and Stability Analysis - A State-of-the-Art

Paranjape

Sinha

Ananthkrishnan

2007

45th AIAA Aerospace Sciences Meeting and Exhibit

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The bifurcation and continuation methodology has evolved over the last two decades into a powerful tool for the analysis of trim and stability problems in aircraft flight dynamics. Over the years, bifurcation methods have been employed to deal with a variety of problems in aircraft dynamics, such as predicting high angle of attack behavior, especially spin, and studying instabilities in rolling maneuvers. The bifurcation methodology has served as a tool for the design of flight control systems, and is promising to be a useful tool in the aircraft design, simulation, testing, and evaluation process. In the present paper, we describe the state-of-the-art in the use of bifurcation and continuation methods for the analysis of aircraft trim and stability with a few illustrative examples. Both the standard and extended bifurcation analysis procedures are discussed and typical results for instabilities in high-α flight and in inertia-coupled roll maneuvers are shown. This is followed by several problems in nonlinear flight dynamics where bifurcation and continuation methods have been fruitfully applied to yield effective solutions. Finally, the use of bifurcation theory to arrive at analytical instability criteria is demonstrated for the aircraft roll coupling and wing rock problems. 76 references have been cited in the text.

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Section: B Choice Of Rigging Angle For Parafoil-payload System Glidimentioning

confidence: 99%

Use of Bifurcation and Continuation Methods for Aircraft Trim and Stability Analysis - A State-of-the-Art

Paranjape

Sinha

Ananthkrishnan

2007

45th AIAA Aerospace Sciences Meeting and Exhibit

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“…Although the hybrid airship is unique, its modelling and stability analysis were done according to the typical procedure of a conventional airship and aircraft. Analysis of parafoil system using trim and stability from researches [3][4][5] uses bifurcation technique and discusses the impact of the model constraints on the longitudinal dynamics with trim along with stability traits for 4DOF longitudinal dynamic flight model. 4DOF comes from 9DOF model of hybrid airship discussed in researches [6][7].…”

Section: Introductionmentioning

confidence: 99%

Longitudinal Trim and Stability Analysis of Hybrid Airship with Suspended Payload for Single Body and Two Body Dynamics Using Bifurcation Method

Kumar¹,

Prakash²

2023

MMEP

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The paper deals with the nonlinear mathematical modelling of the longitudinal dynamics of a small sized hybrid airship with suspended payload vehicle. The modelling is done by considering the system as single body dynamic as well as two body dynamics. Bifurcation Analysis method is applied to do the trim and stability analysis of the system. MATLAB and AUTO bifurcation analysis tool is used for dynamic modeling and simulation of the system. Total five different simulation cases with different elevator deflection are discussed for 3DOF model. For each case Six output states as Vel, gamma, alpha, q, theta and range (h) is taken and one input parameter as dele i.e. elevator deflection is taken. In this paper 6DOF and 3DOF longitudinal conventional single body dynamic model of hybrid airship is discussed and an alternate method as 4DOF two body longitudinal dynamic model of hybrid airship is also considered. Simulation is done for all models on MATLAB and Alternate technique as bifurcation method is also used on AUTO software to study the dynamic analysis of the system. Eigen values is obtained from bifurcation method and is helpful to analyze the stability of the Hybrid airship with suspended payload vehicle.

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“…Meanwhile, the nine-DOF models of parafoils were also investigated by some researchers. 10 –13 It is valuable to mention that all the abovementioned studies computed the aerodynamic parameters of the canopy based on the lifting-line theory, 14 which involves a series of assumptions to account for the effects of the leading-edge incision and the brake deflection of the canopy.…”

Section: Introductionmentioning

confidence: 99%

Accurate calculation of aerodynamic coefficients of parafoil airdrop system based on computational fluid dynamic

Luo

Sun

et al. 2018

International Journal of Advanced Robotic Systems

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Accurate calculation of canopy aerodynamic parameters is a prerequisite for precise modeling of a parafoil airdrop system. This investigation analyses the aerodynamic performance of the canopy in airdrop testing combining the leading-edge incision and the trailing-edge deflection. Aerodynamic parameters of the canopy are obtained using the computational fluid dynamic simulations, and then, the output data are used to estimate the deflection and incision factors. The estimated lift and drag coefficients instead of the traditional parameters based on lifting-line theory are incorporated into the eight degrees of freedom dynamic model of an airdrop system and make some simulations. The effectiveness of the proposed method for calculating aerodynamic coefficients is verified by actual airdrop testing.

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Bifurcation Analysis of Parafoil-Payload System Flight Dynamics

Cited by 16 publications

References 11 publications

Use of Bifurcation and Continuation Methods for Aircraft Trim and Stability Analysis - A State-of-the-Art

Use of Bifurcation and Continuation Methods for Aircraft Trim and Stability Analysis - A State-of-the-Art

Longitudinal Trim and Stability Analysis of Hybrid Airship with Suspended Payload for Single Body and Two Body Dynamics Using Bifurcation Method

Accurate calculation of aerodynamic coefficients of parafoil airdrop system based on computational fluid dynamic

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