Method for Prediction and Optimization of a Stratospheric Balloon Ascent Trajectory

Morani, Gianfranco; Palumbo, Roberto; Cuciniello, Giovanni; Corraro, Federico; Russo, Michelangelo

doi:10.2514/1.39469

Cited by 18 publications

(4 citation statements)

References 6 publications

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“…The airship's motion is subject to the net buoyancy of airship and the atmosphere wind V . It can be assumed that the horizontal velocity of airship is equal to the atmospheric wind [17]. Therefore, the horizontal motion of airship can be assumed at the wind speed.…”

Section: Solar Modelmentioning

confidence: 99%

Coordinated Control of Pressure Difference and Rising Velocity for Stratospheric Airship with Thermal Effects

Hong

Huang

Lin

et al. 2015

Mathematical Problems in Engineering

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Ascending control of stratospheric airship is a challenging control problem, especially if both the rising velocity and the pressure difference between the inside and outside of the airship are required to be controlled simultaneously during ascending. In this paper, a coordinated scheme to control pressure difference and rising velocity of stratospheric airship with vector thrust is presented. With the control scheme, the airship maintains the pressure difference by exhausting air with feedback control. At the same time, the supplemental thrust is generated to compensate the buoyancy fluctuation caused by exhausting air so that the airship’s vertical velocity can track a given reference trajectory. Simulations show that the coordinated control scheme ensures that the airship rises to the altitude of 20 km steadily and rapidly while the pressure difference is always in the safe range. Furthermore, the control scheme is robust enough to the thermal disturbance caused by solar radiation and other thermal processes, which is calculated with partial differential equations.

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Section: Solar Modelmentioning

confidence: 99%

Coordinated Control of Pressure Difference and Rising Velocity for Stratospheric Airship with Thermal Effects

Hong

Huang

Lin

et al. 2015

Mathematical Problems in Engineering

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“…The drag coefficient in the analysis code is presented as a function of the Reynolds number, the Froude number and another dimensionless parameter and it is quite suitable to fit the flight data. And based on the analysis code, a methodology was proposed for the prediction and optimization of the ascent trajectory (Morani et al, 2009;Palumbo et al, 2010). Conner and Arena (2010) discussed the development of a performance predictor for near space balloon systems and the balloon's volume and drag coefficient were established as a function of altitude.…”

Section: Introductionmentioning

confidence: 99%

Influences of initial launch conditions on flight performance of high altitude balloon ascending process

Zhang

2015

Advances in Space Research

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“…Stratospheric balloon payloads are suspended below a helium balloon by means of a flight line that typically consists of a parachute and cables. The dynamics of this system have been investigated in a number of publications (Dvorkin et al, 2001;Yajima et al, 2009;Morani et al, 2009;Alexander & de la Torre, 2011). To date, however, limited attention has been given to the free rotational motion of the system about the gravitational acceleration vector.…”

Section: Introductionmentioning

confidence: 99%

Torsional balloon flight line oscillations: Comparison of modelling to flight data

Aubin

Bayman

Hanany

et al. 2017

Advances in Space Research

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During the EBEX2013 long duration flight the payload was free to rotate in azimuth. The observed azimuth motion consisted of a superposition of full rotations with a period of 10-30 minutes and oscillatory motion with an amplitude of tens of degrees, average period of 79 s, and period dispersion of 12 s. We interpret the full rotations as induced by slow rotations of the balloon and the shorter period oscillatory motion as due to torsional oscillations of the flight line. We derive the torsional stiffness of the flight line using the bifilar pendulum model and apply it to the flight line of the EBEX2013 payload. We find a torsional spring constant of 36 kg m 2 /s 2 corresponding to a period of 58 s. We conclude that the bifilar model, which accounts for the geometry of the flight line but neglects all material properties, predicts a stiffness and period that are 45% larger and 25% shorter than those observed. It is useful to have a simple, easy to use, coarse approximation for

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Method for Prediction and Optimization of a Stratospheric Balloon Ascent Trajectory

Cited by 18 publications

References 6 publications

Coordinated Control of Pressure Difference and Rising Velocity for Stratospheric Airship with Thermal Effects

Coordinated Control of Pressure Difference and Rising Velocity for Stratospheric Airship with Thermal Effects

Influences of initial launch conditions on flight performance of high altitude balloon ascending process

Torsional balloon flight line oscillations: Comparison of modelling to flight data

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