Download Aeroassisted Orbital Transfer: Guidance and Control by D.Subbaram Naidu PDF

By D.Subbaram Naidu

The suggestion of aeroassisting for orbital move has been well-known as one of many serious applied sciences for pioneering the gap frontier. In area transportation structures, aeroassisting (or aerobraking), outlined because the deceleration caused by the results of atmospheric drag upon a motor vehicle in the course of orbital operations, opens new challenge possibilities, in particular with reference to the institution of the everlasting area Station Freedom and house explorations to different planets resembling Mars. the most parts of study stated during this monograph are atmospheric access challenge through the tactic of matched asymptotic expansions, coplanar and non-coplanar orbital transfers with aeroassist expertise, orbital plan switch with aerocruise, and neighbouring optimum assistance. a unique characteristic is the bibliography to be able to give you the reader with a literature prestige for additional research.

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Extra info for Aeroassisted Orbital Transfer: Guidance and Control Strategies

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Ii) It is a two-impulsive transfer with dcorbiting impulse at H E O and re,orbiting impulse at LEO. , no plane change is assumed. (iv) The control is achieved only by lift modulation. (v) Earth's rotation is neglected. (vi) A Ncwtanion inverse square gravitational law is used. (vii) The vehicle has parabolic drag polar. 6 -5 _ t -3 Fig. _ m ~ O " ยข.. > -m . 0 ...... 5 m Fig. 5 w 0 100 200 300 400 O ~L- n O n- . yy= ACLVexp(_H~) + [V/R - IM(R2V)]cosy dt (6) where A = Sp /2m , H = R-R , p = p cxp(-Hl3) and C D = CDO+ KC~.

This can be accomplished by using entirely propulsive (Hohmann) transfer in space only or a combination of propulsive transfer in space and aeroassisted maneuver in atmosphere. It has been established that significant fuel savings of about 50% and hence increased payload capabilities can be achieved by using aeroassisted maneuver instead of the all-propulsive Hohmann transfer [2]. The aeroassisted orbital transfer vehicle (AOTV) utilizes atmospheric drag to slow down to LEO velocity instead of using rocket fuel for retrobraking.

This can be accomplished by using entirely propulsive (Hohmann) transfer in space only or a combination of propulsive transfer in space and aeroassisted maneuver in atmosphere. It has been established that significant fuel savings of about 50% and hence increased payload capabilities can be achieved by using aeroassisted maneuver instead of the all-propulsive Hohmann transfer [2]. The aeroassisted orbital transfer vehicle (AOTV) utilizes atmospheric drag to slow down to LEO velocity instead of using rocket fuel for retrobraking.

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