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Dynamic and Structural Performances of a New Sailcraft Concept for Interplanetary Missions.

Peloni A, Barbera D, Laurenzi S, Circi C - ScientificWorldJournal (2015)

Bottom Line: One of the critical aspects related to this architecture is due to the large deformations of both membrane and booms, which leads to a reduction of the performance of the sailcraft in terms of thrust efficiency.As a consequence, stiffer sail architecture would be desirable, taking into account that the rigidity of the system strongly affects the orbital dynamics.In order to evaluate the manoeuvring performances of this new solar-sail concept, a 35-degree manoeuvre is studied using a feedforward and feedback controller.

View Article: PubMed Central - PubMed

Affiliation: School of Engineering, University of Glasgow, Glasgow G12 8QQ, UK.

ABSTRACT
Typical square solar-sail design is characterised by a central hub with four-quadrant sails, conferring to the spacecraft the classical X-configuration. One of the critical aspects related to this architecture is due to the large deformations of both membrane and booms, which leads to a reduction of the performance of the sailcraft in terms of thrust efficiency. As a consequence, stiffer sail architecture would be desirable, taking into account that the rigidity of the system strongly affects the orbital dynamics. In this paper, we propose a new solar-sail architecture, which is more rigid than the classical X-configuration. Among the main pros and cons that the proposed configuration presents, this paper aims to show the general concept, investigating the performances from the perspectives of both structural response and attitude control. Membrane deformations, structural offset, and sail vibration frequencies are determined through finite element method, adopting a variable pretensioning scheme. In order to evaluate the manoeuvring performances of this new solar-sail concept, a 35-degree manoeuvre is studied using a feedforward and feedback controller.

No MeSH data available.


Related in: MedlinePlus

Euler angles over time for a 35-degree pitch manoeuvre with 0.005 m offset on j-axis.
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Related In: Results  -  Collection


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fig13: Euler angles over time for a 35-degree pitch manoeuvre with 0.005 m offset on j-axis.

Mentions: As shown from Figures 9to 12, no roll control is necessary during a 35-degree yaw manoeuvre with offset on j-axis, because the roll angle is during the entire manoeuvre. Figures 13 and 14 show that for a 35-degree pitch manoeuvre with a disturbance offset on the same axis a roll control is necessary.


Dynamic and Structural Performances of a New Sailcraft Concept for Interplanetary Missions.

Peloni A, Barbera D, Laurenzi S, Circi C - ScientificWorldJournal (2015)

Euler angles over time for a 35-degree pitch manoeuvre with 0.005 m offset on j-axis.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4530289&req=5

fig13: Euler angles over time for a 35-degree pitch manoeuvre with 0.005 m offset on j-axis.
Mentions: As shown from Figures 9to 12, no roll control is necessary during a 35-degree yaw manoeuvre with offset on j-axis, because the roll angle is during the entire manoeuvre. Figures 13 and 14 show that for a 35-degree pitch manoeuvre with a disturbance offset on the same axis a roll control is necessary.

Bottom Line: One of the critical aspects related to this architecture is due to the large deformations of both membrane and booms, which leads to a reduction of the performance of the sailcraft in terms of thrust efficiency.As a consequence, stiffer sail architecture would be desirable, taking into account that the rigidity of the system strongly affects the orbital dynamics.In order to evaluate the manoeuvring performances of this new solar-sail concept, a 35-degree manoeuvre is studied using a feedforward and feedback controller.

View Article: PubMed Central - PubMed

Affiliation: School of Engineering, University of Glasgow, Glasgow G12 8QQ, UK.

ABSTRACT
Typical square solar-sail design is characterised by a central hub with four-quadrant sails, conferring to the spacecraft the classical X-configuration. One of the critical aspects related to this architecture is due to the large deformations of both membrane and booms, which leads to a reduction of the performance of the sailcraft in terms of thrust efficiency. As a consequence, stiffer sail architecture would be desirable, taking into account that the rigidity of the system strongly affects the orbital dynamics. In this paper, we propose a new solar-sail architecture, which is more rigid than the classical X-configuration. Among the main pros and cons that the proposed configuration presents, this paper aims to show the general concept, investigating the performances from the perspectives of both structural response and attitude control. Membrane deformations, structural offset, and sail vibration frequencies are determined through finite element method, adopting a variable pretensioning scheme. In order to evaluate the manoeuvring performances of this new solar-sail concept, a 35-degree manoeuvre is studied using a feedforward and feedback controller.

No MeSH data available.


Related in: MedlinePlus