Flight Dynamics Analysis using High Altitude &amp; Mach Number for Generic Air-Breathing Hypersonic Vehicle

Prakash, Om; Singh, Ritesh

doi:10.2514/6.2021-3271

Cited by 5 publications

(6 citation statements)

References 3 publications

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“…The full nonlinear forces and moments equation for the 3DOF longitudinal dynamics is given in Eq. ( 8) to (11), which includes the axial force equation (U), normal force equation (W), pitching moment equation (q), and kinematic equation (θ ).Where Xa is axial aerodynamic force, XS is axial buoyancy force, XT is axial thrust force, Za is normal aerodynamic force, ZS is buoyancy force in normal direction along z-axis, ZT is normal thrust force, Ma is aerodynamic pitching moment along y-axis, Ms is buoyancy pitching moment due to buoyancy about CG and MT is thrust moment along y-axis or pitching moment. In linearizing the nonlinear equation of motion from Eqns.…”

Section: Figure 8 Mass Distributionmentioning

confidence: 99%

“…In linearizing the nonlinear equation of motion from Eqns. ( 8) to (11), small perturbation theory is applied, where squares of variables and coupling derivatives are omitted and small angle assumption is used. An example of a complete expression of the aerodynamic force in x-axis is given in Eq.…”

Section: Figure 8 Mass Distributionmentioning

confidence: 99%

“…3DOF hybrid airship Longitudinal translational and rotational dynamics Eqns. (8)(9)(10)(11) of the model can be transformed and modelled into the Eqns. (37-44) using the wind axis representation and are given by:…”

Section: Buoyancy or Static Forces And Momentsmentioning

confidence: 99%

“…It shows trimmed flight analysis using outer loop and inner loop equations in the 6DOF aircraft model for different control surface deflections. Trim analysis using equations of motion for aircraft design is presented for steadystate straight flight [11,12] and for turning, pull up and pull overflight [12]. Hybrid-Airships exist in different configurations [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…Non-linear longitudinal dynamic equations for hybrid airship Force equations: Axial force: 𝑚 𝑥 𝑈 ̇+ (𝑚𝑎 𝑥 − 𝑋 𝑞̇) 𝑞̇+ 𝑚 𝑧 𝑞𝑊 − 𝑚𝑎 𝑥 𝑞 2 = 𝑋 𝑎 + 𝑋 𝑆 + 𝑋 𝑇 (8) Normal force: 𝑚 𝑧 𝑊 ̇− (𝑚𝑎 𝑥 + 𝑍 𝑞̇) 𝑞̇− 𝑚 𝑥 𝑞𝑈 + 𝑚𝑎 𝑧 𝑞 2 = 𝑍 𝑎 + 𝑍 𝑆 + 𝑍 𝑇 (Moment equations: Pitching moment: 𝐽 𝑦 𝑞̇+ (𝑚𝑎 𝑧 + 𝑀 𝑢̇) 𝑈 ̇− (𝑚𝑎 𝑥 + 𝑀 𝑤̇) 𝑊 + ̇𝑚𝑎 𝑥 (𝑞𝑈) + 𝑚𝑎 𝑧 (𝑞𝑊) = 𝑀 𝑎 + 𝑀 𝑠 + 𝑀 𝑇 (10) Kinematic equation:𝜃 ̇= 𝑞(11) …”

mentioning

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: Figure 8 Mass Distributionmentioning

confidence: 99%

Section: Figure 8 Mass Distributionmentioning

confidence: 99%

Section: Buoyancy or Static Forces And Momentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

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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Bifurcation Analysis of Longitudinal Dynamics of Generic Air-Breathing Hypersonic Vehicle for Different Operating Flight Conditions

Singh

Prakash

Joshi

et al. 2022

Nonlinear Dynamics and Applications

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Longitudinal Trim and Stability Analysis of Generic Air-Breathing Hypersonic Vehicle using Bifurcation Method

et al. 2022

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The Air-breathing Hypersonic Vehicle (AHV) can meet the futuristic goals of rapid global travel, to Low-Earth Orbit and into space in near-term decades. This paper presents the study of the trim and stability characteristics of the 3DOF longitudinal model of the generic AHV. Longitudinal 3DOF AHV simulation is developed with the aerodynamic model for trim analysis considering the complete flight envelope for Mach number from M=0 to 24. Dynamic model simulation of the 3DOF AHV is performed for the trim conditions and stability of the AHV flight for the complete envelope. Bifurcation Analysis is implemented with the longitudinal 3DOF AHV model for trim analysis and stability for the complete AHV flight envelope.

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Flight Dynamics Analysis using High Altitude & Mach Number for Generic Air-Breathing Hypersonic Vehicle

Cited by 5 publications

References 3 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

Bifurcation Analysis of Longitudinal Dynamics of Generic Air-Breathing Hypersonic Vehicle for Different Operating Flight Conditions

Longitudinal Trim and Stability Analysis of Generic Air-Breathing Hypersonic Vehicle using Bifurcation Method

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