Multibody Dynamics of winged Hybrid Airship Payload delivery System

Prakash, Om

doi:10.2514/6.2020-3200

Cited by 6 publications

(4 citation statements)

References 7 publications

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“…The method is implemented for the 3DOF longitudinal hybrid airship model by applying SBA for the nonlinear dynamic model [4,7] and the state variables are given by x=[V, γ, α, θ, q, h]′. The states are further reduced for simplicity, considering constant velocity, V, constant height, ℎ and considering very small changes in γ, thus the state variable considered for the analysis is reduced and is given by x=[α, θ, q]′.…”

Section: Bifurcation Methods Analysismentioning

confidence: 99%

“…An apparent mass is also taken care in the modelling. A 4-DOF dynamic model of a hybrid airship with suspended payload developed in the research [7]…”

Section: -Dof Two Body Dynamic Longitudinal Modelmentioning

confidence: 99%

“…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]. Analysis of trim conditions [8][9][10] for nonlinear flight control law development is carried out using a model-based control structure.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Bifurcation Methods Analysismentioning

confidence: 99%

“…An apparent mass is also taken care in the modelling. A 4-DOF dynamic model of a hybrid airship with suspended payload developed in the research [7]…”

Section: -Dof Two Body Dynamic Longitudinal Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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“…Several research aspects [10][11][12][13][14] of hybrid airships, consisting of conceptual design, stability analysis, and trajectory optimization, must consider the strong coupling with environmental factors due to its power source and unique lift source. Regarding conceptual design [15], the most widely studied aspect of hybrid airships, multi-disciplinary models [16][17][18], have often been adopted to consider the coupling between the environment and airships.…”

Section: Introductionmentioning

confidence: 99%

Variational Method-Based Trajectory Optimization for Hybrid Airships

Gao,

Bi,

et al. 2024

Aerospace

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Hybrid airships, combining aerodynamic lift and buoyant lift, are efficient near-space aircraft for scientific exploration, observation, and surveillance. Compared to conventional airplanes and airships, hybrid airships offer unique advantages, including stationary hovering and rapid deployment. Due to the different task requirements and strong coupling between flight and environment, trajectory-optimization methods for traditional aircraft are difficult to apply to hybrid airships directly. We propose a trajectory-optimization model based on the variational method to calculate the optimal time and energy paths under weak, uniform, and latitudinal linear wind fields. Our model shows that the influencing factors for the optimization path can be categorized into three types: airship design parameters, wind field parameters, and departure parameters. The result indicates that the optimal time paths are generally straight lines, and the optimal energy paths are piecewise curves with a 24-h cycle under typical hybrid airship design parameters. This work has provided new insight into the trajectory optimization and parameter design of future hybrid airships.

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Nonlinear Modelling and Analysis of Longitudinal Dynamics of Hybrid Airship

Kumar

Prakash

2022

Nonlinear Dynamics and Applications

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Multibody Dynamics of winged Hybrid Airship Payload delivery System

Cited by 6 publications

References 7 publications

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

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

Variational Method-Based Trajectory Optimization for Hybrid Airships

Nonlinear Modelling and Analysis of Longitudinal Dynamics of Hybrid Airship

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