New PDF release: Aeroassisted Orbital Transfer: Guidance and Control

By D.Subbaram Naidu

ISBN-10: 3540198199

ISBN-13: 9783540198192

ISBN-10: 3540393099

ISBN-13: 9783540393092

The proposal of aeroassisting for orbital move has been famous as one of many severe applied sciences for pioneering the gap frontier. In area transportation structures, aeroassisting (or aerobraking), outlined because the deceleration due to the results of atmospheric drag upon a motor vehicle in the course of orbital operations, opens new venture possibilities, particularly in regards to the institution of the everlasting area Station Freedom and area explorations to different planets corresponding to Mars. the most components of study pronounced during this monograph are atmospheric access challenge by means of the strategy of matched asymptotic expansions, coplanar and non-coplanar orbital transfers with aeroassist know-how, orbital plan swap with aerocruise, and neighbouring optimum suggestions. a distinct characteristic is the bibliography in an effort to give you the reader with a literature prestige for extra research.

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Extra resources for Aeroassisted Orbital Transfer: Guidance and Control Strategies

Example text

2C ] +2/(l+h) -cos- 1(C2/4-2 (C 1+ 1)} r~ c -- ~ 4 -cos -i [co,a/cos%] COSIc= c°sC3c°s [tanalog Ctan(Yo/2+~4)~ +C5] kcosaexp(-h/e)+C2 26 CHAPTER 2: ATMOSPHERIC ENTRY PROBLEM °°,"I + ,m l 1+2clc j oo, I. , 1 and C. and the states from the inner solution. The states of inner solution 1 are obtained as explicit functions of the (~. and la via (9). 1 To check whether the composite solution (14) asymptotically satisfies the given initial conditions, consider (14) along with (9), (11). Then 2 ve(h=h) = (- l- +~ h" .

_ m ~ O " ¢.. > -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~. _yy= Abrl~v + bvcosy dx (b-l+h) b2eosy (b. 4 Optimal Control For an optimal control problem with minimum fuel consumption, it is required to choose the performance index to minimize the total characteristic velocity, which is the sum of the initial characteristic velocity AVa, the deorbit impulse from HEO, and the final characteristic velocity A V , the circularization impulse into LEO.

Note that this is also called the intermediate solution in singular perturbation methods [14, 15]. Now force the outer solution (7) to satisfy the given initial conditions, vi, ~/i cti' f~i' and I i corresponding to h = h i. This gives C 1 -- y/21 " I/(l+h) c2 = c°sVl+hi i CHAPTER 2: ATMOSPHERIC ENTRY PROBLEM I C 3 = o~i - c o s -i C =t~ 4 COS2Yi (l+hi)vi- 1 . . 23 1 . [I 1+[v/i+h~)-2][cos2~'/l+hi)v,]J i C5 = I i (10) Thus, the relation between the constants of outer solution explicitly in terms of the given initial conditions is obtained.

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

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