Arvutitehnika Thesis Msc 2014 Olentshenko Georgi Text 20140528

8/11/2019 Arvutitehnika Thesis Msc 2014 Olentshenko Georgi Text 20140528

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UNIVERSITY OF TARTU

Faculty of Science and Technology

Institute of PhysicsComute! Enginee!ing

"eo!gi Olent#en$o

PROTOTYPE %ESI"N OF ESTCU&E'(

ATTITU%E AN% OR&IT CONTRO) SYSTE*

*aste!+s Thesis

Sue!,iso!s-

*.Sc. And!is Sla,ins$is

*.Sc. Vil/o Alli$

Ta!tu (012


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Contents

Ac!onyms and A33!e,iations...............................................................................................................2

1 Int!oduction.......................................................................................................................................4

( O,e!,ie5...........................................................................................................................................6

(.1 ESTCu3e'1.................................................................................................................................6

(.( ESTCu3e'( and ESTCu3e'7 *issions......................................................................................6

(.7 O,e!,ie5 of Attitude and O!3it Cont!ol Systems......................................................................8

7 ESTCu3e'( Attitude and O!3it Cont!ol System..............................................................................10

7.1 Re9ui!ements...........................................................................................................................107.( System St!uctu!e......................................................................................................................11

7.(.1 Senso!s.............................................................................................................................1(

7.(.( Th!uste!s and To!9ue!s.....................................................................................................17

7.(.7 *anagement :a!d5a!e....................................................................................................17

2 P!ototye %esign.............................................................................................................................12

2.1 Re9ui!ements...........................................................................................................................14

2.( Concet....................................................................................................................................16

2.7 :a!d5a!e Selection..................................................................................................................18

2.7.1 P!ocessing Unit................................................................................................................18

2.7.( "y!oscoic Senso!s..........................................................................................................(0

2.7.7 *agnetomete!s.................................................................................................................(1

2.7.2 Accele!omete!s.................................................................................................................(1

2.7.4 Analog'to'%igital Con,e!te!s...........................................................................................(7

2.7.6 Po5e! *anagement :a!d5a!e.........................................................................................(2

2.7.; %e3ugging Functionality..................................................................................................(2

2.2 P!ototye &oa!d %esign...........................................................................................................(4

2.2.1 Schematic.........................................................................................................................(4

2.2.( &oa!d )ayout....................................................................................................................(te..........................................................................................................................................76

Refe!ences..........................................................................................................................................7;

Aendices.........................................................................................................................................27

Aendi? A @ P!ototye &oa!d Schematic....................................................................................27

Senso!s g!ou............................................................................................................................27

A%Cs g!ou..............................................................................................................................24

Po5e! management g!ou.........................................................................................................2;

*CU g!ou...............................................................................................................................4(

%e3ugging g!ou.......................................................................................................................44

Connecto! g!ou........................................................................................................................4;

Aendi? & @ AOCS P!ototye &oa!d )ayout Full scaleB...........................................................4o"t#g! Spp". (&&!nt

9%A:

R#ng! 9g: S!nsiti$it.

9>/g:

;ois! d!nsit.

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has a smalle! ac$age SC';0'4B than =TY8( se!ies senso!s.

ESTCu3e'1 used A%R7240 48!efe!ence ,oltageG 3ut it 5as meant fo! A%Cs oe!ating at 4 V

le,el. A%R7270 485as selected f!om the same se!iesG 3ecause it !o,ides the 3est ,oltage le,el

accu!acy 5ith lo5 ,oltage d!o'out (40 mV ma?imumB and lo5 o5e! consumtion 100 AB.

This 7 V ,oltage !efe!ence is used fo! 3oth (2'3it and 1('3it A%Cs.

$.3.+ %ower !ana"ement #ardware

*ain u!ose of o5e! management elect!onics is allo5 indeendently tu!ning off ICs o!

disconnecting them de,ices f!om communication 3uses. This functionality is !o,ided 3y using

o5e! and 3us s5itches. Po5e! s5itches disconnect the o5e! suly of a de,ice and 3us s5itch

isolates communication inte!face of the same de,ice. The most imo!tant de,ices that ha,e to 3e

!o,ided 5ith this functionality a!e the senso!s and A%Cs.

TPS((


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an US& inte!faceG 4 V )%O is 3yassed. )P(


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The schematic of the !ototyes contains almost a hund!ed integ!ated ci!cuits each of 5hich

!e9ui!es e?te!nal elect!onic comonents to function sta3ly and lo5e! the noise ma!gin. The

schematic is di,ided into 3loc$G 5he!e each IC is su!!ounded 3y the dedicated signal integ!ity

elect!onic comonents.

E,en if the main o5e! suly of the 3oa!d is e?cetionally sta3leG imedance of the t!aces and

othe! signals th!oughout the 3oa!d could influence the sta3ility of an IC o5e! suly. The!efo!e all

ICs in gene!al !e9ui!e decouling caacito!s to !educe inut !ile of the o5e! suly. In se,e!al

cases sea!ate caacito!s a!e used close to analog and digital o5e! sulies of one ICG although the

same o5e! suly is used. Tyically a 100 nF caacito! is used. In some cases smalle! o! la!ge!

caacito! is needed deending on the integ!ated ci!cuit.

Communication 3uses used on the 3oa!d !e9ui!e ull'u !esisto!s. In a!ticula!G IC needs ull'u

!esisto!s on 3oth signal lines and SPI !e9ui!es a sea!ate ull'u on e,e!y chi select signal. Pull'

us a!e laced ne?t to sla,e de,ices to d!i,e the signal high 5hen the !ocesso! is not d!i,ing the

signal. Pull'do5n !esisto!s a!e also needed to d!i,e some othe! signals to lo5 le,el. These signals

include selftest ins fo! analog senso!s fo! e?amle.

In addition to a3o,e desc!i3ed casesG most ICs !e9ui!e e?te!nal elect!onic comonents fo! othe!

!easons. Those !easons a!e desc!i3ed sea!ately in each cases du!ing this section. To simlify the

st!uctu!e of the schematic as 5ell as its desc!itionG comonents 5e!e di,ided into 6 functional

g!ous- senso!sG A%CsG o5e! managementG *CUG de3ugging and connecto! g!ous. Schematic of

the !ototye can 3e found unde! Aendi? Ain figu!e 8'(2.

?* S!nso&s g&op

The g!ou includes fou! digital and t5o analog gy!oscoic senso!s figu!e 8BG th!ee magnetomete!sG

t5o digital accele!omete!sG one analog accele!omete! and si? teme!atu!e senso!s figu!e


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&and5idth of =HR&4 analog accele!omete! is dete!mined 3y a filte! caacito!. A 2.; nF caacito!

allo5 f!e9uencies of u to 1 $:J. FHOS8;00CW !e9ui!es t5o additional 100 nF caacito!s fo!

3yassing the inte!nal !egulato! and fo! the magnetic !eset ulse. It is !ecommended to connect a

2.; F !ese!,oi! and a 0.(( F setD!eset caacito!s to )S*707% senso!.

To !educe the outut noise couling of the )*T86 teme!atu!e senso!G a 1 nF caacito! is used.

3* ADCs g&op

This g!ou includes si? A%Cs and t5o ,oltage !efe!ences dedicated to the A%Cs figu!es 10 and

11B.

A 1 F caacito! is connected to ,oltage !efe!ences outut to im!o,e sta3ility and !educe the high

f!e9uency noise. All A%Cs ha,e additional 0.1 F caacito!s on the !efe!ence inuts fo! the same

!eason.

&oth (2'3it A%Cs ha,e sea!ate c!ystal oscillato!sG 5hich a!e highe! !ecision and lo5e! /itte! cloc$

sou!ces coma!ed to inte!nal cloc$ sou!ces. A%;1;7'8 on the othe! hand has t5o on'3oa!d )%O

!egulato!sG 3oth of 5hich !e9ui!e 1 F and 0.1 F caacito!s to the co!!esonding ins.

Although 1('3it A%Cs and A%;;18 do not !e9ui!e mo!e e?te!nal elect!onic comonentsG in addition

to mentioned to the ones desc!i3ed at the 3eginning of the section. All high !ecision A%Cs !e9ui!e

ce!tain layout conside!ations thoughG 3ut that is desc!i3ed in the 3oa!d layout section.

&ecause 7 V !efe!ences a!e usedG ,oltage di,ide!s must 3e used to 3!ing the the ea$ ,oltage of

se,e!al signals unde! 7 V. Voltage di,ide!s a!e used fo! all senso! o5e! suly ,oltage

measu!ements and Sun senso! signalsG 5hich ma?imum ,oltage could 3e as high as 4 V.

,* Po0!& %#n#g!%!nt g&op

This g!ou consists of IDO e?ande!sG o5e! s5itches and 3us s5itchesG not dedicated to the *CU

figu!es 1(G 17G 12G 14and16B. The!e a!e (0 o5e! s5itches in this g!ou. Each one has sta3iliJing

caacito!s on inut and outut and a ull'do5n !esisto! on the ena3le signal to ensu!e that on sta!t'u the o5e! s5itch is tu!ned off. In addition to thatG all o5e! s5itches ha,e a single common

signal- o5e! fault @ an oen'd!ain oututG 5hich !e9ui!es a ull'u !esisto!. SN;2C&T)V7782 3us

s5itches also !e9ui!e in,e!te!s to the ena3le outut signals 3ecause they a!e acti,ated at lo5 le,el.

ithout in,e!te!s 3us s5itch 5ould 3e acti,ated afte! sta!t'u.

6* MCU g&op

This g!ou includes the ST*7(F2 !ocesso! figu!e 1;BG fou! 3us s5itches figu!es 18and 1


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ST*7(F2 !ocesso! !e9ui!es t5o (.( F caacito!s fo! the main on'3oa!d !egulato! and t5o 9ua!tJ

oscillato!s- 7( $:J fo! the inte!nal RTC and 16 *:J as the main cloc$ sou!ce. Also one )E% is

laced ne?t to the *CU fo! de3ugging u!osesG 3ecause the !est of the )E%s is laced 3ehind the

3us s5itches.

SN64:V%;4 RS'284 d!i,e!s !e9ui!e t!ansient',oltage'su!ession diodesG 5hich !otect the

communication 3us f!om ,oltage si$es. The ,alue of the !esisto! 3et5een A and & diffe!ential

signals deends on the imedance of the connectionG so at the moment it is left undefined.

+* D!gging 'n(tion#"it. g&op

This g!ou consists of )%Os figu!e (1BG US& communication d!i,e!s fo! diffe!ent 3us inte!facesG

cu!!ent sensingG cont!ol 3uttons and )E%s figu!e ((B.

)P(


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5hich is meant to allo5 connecting US& and 3atte!y 4 V sou!ce in case o5e! sou!ce must 3e

s5itched 5ithout o5e!ing do5n the 5hole 3oa!d. And the!e a!e of cou!se the de3ugging

inte!faces- S% t5o'5i!e inte!face fo! ST*7(F2 de3ugging and the US& connecto!s fo! the US&

d!i,e!s. US& connecto!s !e9ui!e (; F caacito!s fo! the signal lines to sta3iliJe the

communication.

$.$.2 oard /ayout

This section desc!i3es the concets in,ol,edG st!ategy used and decisions made du!ing 3oa!d design

fo! the !ototye 3oa!d. &oa!d design 3y laye! can 3e found unde!Aendi? &.

A 2 laye! 3oa!d design is usedG 5hich allo5s using a g!ound lane as one of the laye!s. A 5hole

laye! dedicated to g!ound !o,ides lo5 g!ound imedance and allo5s a,oiding g!ound loos in

most cases. This also significantly simlifies the designG 3ecause !actically each ci!cuit has ag!ound connection.

Aendi? C contains the full 3ill of mate!ials fo! AOCS !ototye 3oa!d. Se,e!al hund!eds of

comonents 5ith a3out 1400 connections is difficult to o!ganiJe 5ithout a st!ategy. The design

st!ategy must ta$e into account that ce!tain comonents ha,e to 3e laced in ce!tain !esect 5ith

each othe! and that the!e a!e only 7 laye!s a,aila3le fo! !outingG e?cluding g!ound lane.

%ecouling caacito!s fo! e?amle as 5ell as othe! signal integ!ity !elated comonents a!e !e9ui!ed

to 3e laced ne?t to the IC dedicated ins. Ta$ing that into conside!ation the fi!st ste of the st!ategy

is to com3ine comonents in to g!ous acco!ding to schematic 3loc$s.

Second ste is to o!ganiJe the g!ous 5ithin them sel,es. Placing e?te!nal elect!onics comonents

ne?t to the IC dedicated ins is c!itical to simlify fu!the! o!ganiJation. At this oint simila!ity of

the 3oa!d layout design to the schematic ends. Result of this ste should consist of g!ous o!ganiJed

on one of the sides of the 3oa!d.

The thi!d ste is to o!ganiJe the g!ous into o5e! management units 5ith a single o5e! suly

and 3us inte!face. Fo! e?amle a senso! is com3ined 5ith the dedicated o5e! and 3us s5itches.

The outcome of the this ste is usually a t5o side unit 5ith !elati,ely small amount of e?te!nal

connections. At this oint some !outing could 3e doneG 3ut only on the laye!s that the comonents

a!e laced.

The fou!th ste is to o!ganiJe these units into the o,e!all st!uctu!e of the 3oa!dG ta$ing into

conside!ation communication 3uses and the main o5e! suly. Sea!ating analog and digital

signals is also ad,isedG esecially if high accu!acy measu!ements a!e e!fo!med. Usually it ta$es

se,e!al t!ies to get a suita3le st!uctu!e.

(


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Afte! the main st!uctu!e of the 3oa!d is esta3lishedG the last ste must 3e ta$en- otimiJation.

OtimiJation means !ead/usting the comonents fo! otimal sace and connecti,ity. Usually

unotimiJed g!ous ta$e mo!e sace and ha,e inte!5ined signals in !esect to the 3oa!d st!uctu!e.

OtimiJation is needed to im!o,e the final comosition of the 3oa!d. The last ste tyically ta$es

the most time of the 3oa!d layout design. Visual !e!esentation of the st!ategy can 3e found unde!Aendi? %.

In addition to gene!al st!ategy of the 3oa!d layout designG ce!tain decisions 5e!e made to simlify

the st!uctu!e of the 3oa!d. It 5as decided to lace all of the senso!s on the to side of the 3oa!d and

ma!$ the measu!ement di!ections 5ith sil$sc!een. Simila!ly o5e! management ICs a!e mostly

laced on the 3ottom of the 3oa!d. This allo5s c!eating the o5e! management units desc!i3ed in

the design st!ategy.

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Figure 0:*ai% +Cs of OCS prototype board. 1! digital gyroscopes. )/ digital accelerometers,

0 magnetometers, 11 12bit A"Cs, 1!1) 2!bit A"Cs, 1/ analog accelerometer, 1013

analog gyroscopes, 1 . 4 5"O, 222 6S$ inter&aces, 22! 7S!3) dri%ers, 2) 7*C, 2/20

F7A+, 232 89O 'panders, +C6.


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Figu!e ; highlights the main ICs on the !ototye e?cluding o5e! and 3us s5itches. The logical

units of the 3oa!d 5e!e g!oued in 7 diffe!ent 5ays- 3y functionG 3y communication 3us and 3y IDO

e?ande! !each. "!ouing is desc!i3ed acco!ding to Figu!e;.

Fi!st of allG units a!e g!oued 3y functionality. *CU 5ith its dedicated 3us s5itches is laced in the

cente! 70B. %e3ugging comonents 5e!e 3!ought to the !ight side of the 3oa!d 1


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layout has 3een done 5ith a minimum of 0.12 mm ga. This inc!easing the ossi3le e!!o! ma!gin fo!

the manufactu!e!. ;1

$.$.3 0esult

A 110 mm 114 mm AOCS !ototye 3oa!d has 3een designed. The design satisfies all of the!ototye !e9ui!ement stated in this thesis.

The dou3le s5itch concet and its imlementation allo5s tu!ning off all senso! and A%Cs

indeendently.

Redundancy fo! each tye of senso!s is !o,ided 3y the !ototye 3oa!d design.

The 3oa!d allo5s testing of a !ange of diffe!ent senso!s 3y e?loiting the !edundancy

!e9ui!ement.

Inte!faces fo! communication testing and e,aluation of e?te!nal de,ices a!e !o,ided.

Inte!!uts a!e used fo! measu!ement comletion indication to simlify the fi!m5a!e

de,eloment.

Each senso! o5e! suly ,oltage and teme!atu!e a!e measu!ed 3y an on'3oa!d A%C.

P!ototye is a3le to 5o!$ f!om a 3atte!yG 5hich simlifies ha!d5a!e testing.

&oa!d design !o,ides de3ugging facilities fo! ha!d5a!e and soft5a!e.

E?licit ha!d5a!e !e9ui!ements a!e fulfilled. Summa!y of most imo!tant integ!ated ci!cuits used in

the design-

Si? gy!oscoic senso!sG t5o analog and fou! digitalK

Th!ee accele!omete!sG one analog and t5o digitalK

Th!ee magnetomete!sG all digitalK

T5o (2'3it lo5 noise analog'to'digital con,e!te!s fo! analog senso!sK

Fou! 1('3it analog'to'digital con,e!te!s fo! Sun senso!G teme!atu!e and o5e! sulymeasu!ementsK

A *CU 5ith FPUG sufficient e!ihe!als and lo5 o5e! consumtionK

(0 load s5itches fo! o5e! managementK

2'3itG 10'3it and (2'3it 3us s5itches fo! o5e! managementK

US& inte!face fo! diffe!ent communication 3usesK

)%Os fo! standalone usage.

7(


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".) AOCS #rototy$e Analysis and *irmware 'evelo$ment

This section sho!tly desc!i3es fu!the! !ototye de,eloment lan as 5ell as cu!!ent de,eloments

in AOCS fi!m5a!e. The !esult of this thesis is a 3oa!d designG 5hich has to 3e assem3ledG tested and

analyJed fo! fla5s 3efo!e it can 3e used fo! fi!m5a!e de,eloment.The !ototye is lanned to 3e assem3led 3y the autho! afte! su3mission of this thesis. Ta!tu

O3se!,ato!y 5ill !o,ide all !e9ui!ed tools fo! the assem3ly and testing. E,en though g!eat effo!t

5as ut into the design to a,oid schematic and 3oa!d layout e!!o!sG it cannot 3e assumed that the

3oa!d is fla5less. The!efo!e all fla5s found in the 3oa!d design 5ill 3e !eo!ted and analyJed. This

analysis 5ill 3e used in fu!the! AOCS main 3oa!d de,eloment.

Afte! the latfo!m is assem3led and testedG it can 3e used fo! fi!m5a!e de,eloment. AOCS

algo!ithms !e9ui!e ,e!y st!ict schedulingG 5hich could 3e achie,ed only 3y a !eal'time oe!atingsystem. Cu!!ently t5o ossi3ilities a!e conside!ed.

Fi!st solution 5ould 3e to !euse the ESTCu3e'1 Command and %ata Cont!ol Systems f!eeRTOS

oe!ation system. ESTCu3e team is mo!e familia! it and some d!i,e!s 5ould 3e easily !e5!itten fo!

the ne5 latfo!m. At the same time the!e 5ill 3e a diffe!ent oe!ating system fo! the On'&oa!d

Comute!G 5hich 5ill comlicate the ESTCu3e'( fi!m5a!e as a 5hole.

The second solution 5ould 3e to also mig!ate to a )inu? li$e oe!ating system of On'&oa!d

Comute!. Simila!ity of the oe!ating systems 5ill simlify futu!e de,elomentG 3ut initial fi!m5a!e

de,eloment 5ill 3e stagge!ed 3ecause of the lac$ of e?e!ience.

Selection of the oe!ating system 5ill 3e e!fo!med afte! initial tests on AOCS !ototye 5ill 3e

e!fo!med. Afte! the selectionG d!i,e!s fo! all ha!d5a!e comonents must 3e 5!itten. That includes

info!mation gathe!ing and actuato! cont!ol d!i,e!s. Po5e! management d!i,e!s should 3e also

tho!oughly tested. Conse9uently AOCS algo!ithms can 3e de,eloed and tested as 5ell as it is

ossi3le on Ea!th.

ESTCu3e'( mission is to test the satellite technologies in o!3it fo! ESTCu3e'7 missionG hence the

ne?t ste 5ill 3e to test the AOCS algo!ithms in lo5 Ea!th o!3it.

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+ Acnowled"ements

I 5ould li$e to than$ my sue!,iso!s And!is Sla,ins$is and Vil/o Alli$ fo! thei! suo!t and sha!ing

thei! $no5ledge. They guided me in toics of satellite 3uilding and elect!onics design. I ha,e

lea!ned a lot f!om them.

I 5ould li$e to e?!ess my g!atitude to all ESTCu3e team mem3e!s as 5ell as inst!ucto!sG 5ho

sha!ed thei! $no5ledge 5ith me. *any than$s to T>nis Eenm\eG aan Vi!u and E!i$ Il3is in that

!esect. Secial than$s to Ind!e$ SQnte!G =asa!s )aiJans and aanus =alde fo! heling me design

and !e,ie5ing the !ototye 3oa!d. Than$s to =a!oli =ahn fo! managing the ETSCu3e'( !o/ect.

I 5ould li$e to than$ Sil,e! )\tt and *a!t Noo!ma fo! managing the 5hole student satellite

!og!am.

Finally I am g!ateful to my family 5ho suo!ted me mo!ally th!oughout the !o/ect.

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ESTC!-3 #s!ndi # o&iidi 1ti%issst!!%i p&ototpi dis#in

"eo!gi Olent#en$o

ouvte

Esimene Eesti satelliit ESTCu3e'1 ,iidi edu$alt maal\hedasele o!3iidile (017. aasta mai$uus ningaasta ,\ltel on satelliit t\itnud eaaegu $>i$ oma eesm\!gid ,\l/a a!,atud \i$eseu!/e

e$se!iment;. E$se!imendi /oo$sul anna$se satelliit ]]!lema $ii!usega 1 ]]!e se$undisG

$e!ita$se 10 m i$$une mi$!o/uhe ,\l/a ning laeta$se see $>!ge otentsiaalini. Teo!eetiliselt ea$s

laetud mi$!o/uhtme /a *aa ionosf\\!ilise lasma ,astasm>/u toimel satelliidi ]]!lemis$ii!us

$ahanema 12. =uigi missioon ole ,eel l>enudG laanita$se /u3a Eesti Tudengisatelliidi

!og!ammi !aames /\!gmisi missioone 11.

^$s ESTCu3e'( /a ESTCu3e'7 missioonide eesm\!$idest on /\t$ata \i$eseu!/e testimistG$asutades 1 $m i$$usega mi$!o/uhet. Teise$s eesm\!gi$s on demonst!ee!ida;anoSpace Cold lemat meetodit saa3

otentsiaalselt $asutada $osmoses !eisimise$s 17.

*agist!it]] /oo$sul a!endati uut satelliidi asendi /a o!3iidi /uhtimissQsteemiG mis on h\da,a/ali$

missioonide teadusli$e eesm\!$ide t\itmise$s. *agist!it]] eesm\!$ide$s oli-

tuua ,\l/a n>uded ESTCu3e'( asendi /a o!3iidi /uhtimissQsteemi /ao$sK

$i!/eldada sQsteemi st!u$tuu!iK

tuua ,\l/a n>uded satelliidi asendi /a o!3iidi /uhtimissQsteemi !ototQQlaadi /ao$sK

,alida !iista,a!a !ototQQlaadi /ao$sK

a!endada satelliidi asendi /a o!3iiti /uhtimissQsteemi esimene !ototQQlaat.

P!ototQQlaadi $onstu$tsioon >hine3 ESTCu3e'1 asendi /uhtimissQsteemil /a ESTCu3e

mees$onna $ogemustel. Tule,alt uute missioonide oolt esitata,atest n>uetest on ,a/ali$ $a

t\ienda,a !iist,a!a lisamine ning sQsteemi suu!ema />udluse ga!antee!imine. On analQQsitud teiste

nanosatelliitide lahendused. T]] /oo$sul oli ,alitud uued ele$t!ooni$a$omonendid /a $asutatud

uued $onst!u$tsioonilahendusiG mis ,\lista,ad ESTCu3e'1 $onst!u$tsioonis leitud uudusi.

Tulemuse$s on saadud $>i$idele n>udmistele ,asta, !ototQQlaadi $onstu$tsioon. P!ototQQlaat

,>imalda3 ,\l/a lQlitada $>i$ andu!id Qhe $auaG ,>imalda3 $o!!aga l\3i testida ,ali$ut so3i,aid

andu!eid /a ,>imalda3 efe$tii,selt testida ,a/ali$$e !iist,a!a' /a ta!$,a!a$omonente.

T]] tulemuse$s on !ototQQlaadi $onstu$tsioonG mida on ,almis $o$$umontee!imise$s /a

testimise$s. Seega eale magist!it]] esitamist $a,atse3 auto! t]]d /\t$ata ning a!endada ta!$,a!a

$onst!uee!itud lat,o!mi /ao$s.

76


37/67

0e4erences

1 _Cu3eSat %esign SecificationG The Cu3eSat P!og!amG Califo!nia Polytechnic State

Uni,e!sityG anua!y 8G (00nis Eenm\eG =asa!s )aiJansG =a!lis

baliteG Riho VendtG ohannes Pieen3!oc$G Ilma! Ans$oG Ahto )eituG And!es Vahte!G Ants

AguG Elo EilonenG Endel SooloG :end!i$ Eh!aisG :en!i )illmaaG I,a! *ahhoninG aa$

*>ttusG aan Vi!uG aanus =aldeG ana u3itidJeG nis *ucenie$sG nis ateG ohan =QttG

u!is Poe,s$isG Q!gen )a$sG =adi =i,isti$G =ad!i')iis =usminG =alle'"usta, =!uusG =a!l

Ta!3eG =at!in TuudeG =at!na =alniaG )au! oostG *a!$o )>o$eG *a!$us \!,eG *a!t Vella$G

*a!tin Nee!otG *a!tin Valgu!G *a!tynas Pela$aus$asG *atis A,e!inG *ats *i$$o!G*ih$el

Ves$eG Ott Schele!G Paul )iiasG P!iit )aesG Ramon RantsusG Reimo Soosaa!G Risto Reinum\giG

Ro3e!t Valne!G Siim =u!,itsG S,en'E!i$ *\ndmaaG Taa,i Il,esG Tanel PeetG Ta,o AniG Teet

Til$G Timothy :en!y Cha!les TammG To3ias Scheffle!G Toomas Vahte!G T>nis Ui3ouinG

Veigo E,a!dG And!eas Sisas$G )au!i =immelGOlaf =!]me!G Roland RostaG Pe$$a anhunenG

ouni En,allG Pet!i Toi,anenG Timo RauhalaG :en!i Se\nenG u$$a U$$onenG Ed5a!d

:aeggst!]mG Risto =u!aG Taneli =al,asG Olli Ta!,ainenG anne =auinenG Antti

Nuotta/\!,iG :annu =oi,istoG Se!giy =i!ichG Ale?ande! O3!aJtso,G Vil/o Alli$G Anu Reina!tG

*a!t Noo!maG _ESTCu3e'1 nanosatellite fo! elect!ic sola! 5ind sail in'o!3it technology

7;
http://www.raumfahrt.fh-aachen.de/compass-1/download/COMPASS-1%20Flight%20Results.pdfhttp://www.raumfahrt.fh-aachen.de/compass-1/download/COMPASS-1%20Flight%20Results.pdfhttp://www.sstl.co.uk/Missions/STRaND-1--Launched-2013/STRaND-1/STRaND-1--Smartphone-nanosatellitehttp://www.sstl.co.uk/Missions/STRaND-1--Launched-2013/STRaND-1/STRaND-1--Smartphone-nanosatellitehttps://directory.eoportal.org/web/eoportal/satellite-missions/s/swisscubehttps://directory.eoportal.org/web/eoportal/satellite-missions/s/swisscubehttp://rax.engin.umich.edu/http://rax.engin.umich.edu/http://www.raumfahrt.fh-aachen.de/compass-1/download/COMPASS-1%20Flight%20Results.pdfhttp://www.raumfahrt.fh-aachen.de/compass-1/download/COMPASS-1%20Flight%20Results.pdfhttp://www.sstl.co.uk/Missions/STRaND-1--Launched-2013/STRaND-1/STRaND-1--Smartphone-nanosatellitehttp://www.sstl.co.uk/Missions/STRaND-1--Launched-2013/STRaND-1/STRaND-1--Smartphone-nanosatellitehttps://directory.eoportal.org/web/eoportal/satellite-missions/s/swisscubehttp://rax.engin.umich.edu/


38/67

demonst!ationG (roceedings o& the 'stonian Academy o& SciencesG (012G 67G (SG (00@(0


39/67

elect!ons 3y o!3it chaotisation due to sacec!aft 3odyG Annales nis Eenm\eG Riho Ve!dtG =auo

Voo!mansi$G Ilma! Ans$oG Vil/o Alli$G Sil,e! )\ttG *a!t Noo!maG _Attitude dete!mination

and cont!ol fo! cent!ifugal tethe! deloyment on the ESTCu3e'1 nanosatelliteG`(roceedings

o& the 'stonian Academy o& SciencesG (012G 67G (SG (2(@(2


40/67

'lectric (ropulsion Con&erenceG The "eo!ge ashington Uni,e!sityG ashingtonG %.C.G

USAG Octo3e! 6@10G (017.

(8 Phili &ange!tG Stehan &uschG =laus ScillingG _Pe!fo!mance cha!acte!istics of the UE'7

miniatu!e attitude dete!mination and cont!ol systemG`8AA Con&erence on "ynamics and

Control o& Space Systems, IAA'AAS'%yCoSS('12'04'0;G (00;.

(


41/67

27 )IS7*%)G 7'a?is digital magnetomete!G data sheetG ST*ic!oelect!onicsG Re, (G A!il (017.

22 *A"7110G 7'a?is digital magnetomete!G data sheetG F!eescale Semiconducto!G Inc.G Re,.


42/67

62 )*111;'ND)*111;IG 800 mA )%O Regulato!G Te?as Inst!umentsG *a!ch (017.

64 )P(


43/67

A&&endices

A$$endi+ A , #rototy$e %oard S!emati!

Sensors "rou&

27

Figure 3: +A>21, $+


44/67

22

Figure : 6pper le&t: #+C)335, 58S+"5 and +A7$),F>C30C and 5S+" accelerometers. $ottom: si 5+*3/ temperature sensors.


45/67

A'Cs "rou&

24

Figure 1: *op: A"001 and A"010 2!bit analogtodigital con%erters. $ottom: two %oltage

re&erences.


46/67

26

Figure 11: *op: two +A>11/ and two A"0! 12bit analogtodigital con%erters. $ottom:

%oltage di%iders &or power supply and Sun sensors measurements.


47/67

%ower mana"ement "rou&

2;

Figure 12: *here are 2 power switched &or all sensors, A"Cs and F7A+s.


48/67

28

Figure 1: *hree 1bit bus switches &or A"Cs.


49/67

2

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Arvutitehnika Thesis Msc 2014 Olentshenko Georgi Text 20140528

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