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This is the presentation which was given to very broad audience about software errors in designing and controlling space missions. It covers some of Soviet, American, European and Russian missions. Recent SpaceX Dragon SW and HW design concluded the presentation.
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Nedelin 1960
R-16 ICBM
R-16 ICBMDIABLOV JED (HYPERGOLICKÝ ASYMETRICKÝ DIMETHYLHYDRAZIN A OKYSLIČOVADLO AK27I)
PO NATANKOVANÍ DO RAKETY NEJDE VYPUSTIŤ
AK27I84% HNO3
13% N2O4
1–2% H2O }EXTRÉMNE KOROZÍVNEEXTRÉMNE JEDOVATÉEXTRÉMNE ÚČINNÉ
UDMHC2H8N2
80-150 mŕtvych
safety blocks were disabled because of
testing
všetky bezpečnostné poistky vypnuté
zle navrhnutá elektronika
zlá pyrotechnika
jeden spínač
Mariner 1
Atlas LV-3
Agena-B
Mariner
¯̇Rn ;VS
Cena preklepu = $18.5 mil.
(cca $200 mil. v 2013)
"The most expensive hyphen in history"
Pri ICBM vždy veľa chýb
intermezzo
NOAA N-Prime
cena opravy$135 000 000
Phobos 1 & Phobos 2
spolupráca14 krajín
Phobos-1 prestala odpovedať
Chyba bola nájdená v poslanom programe, ktorý deaktivoval trysky na
ovládanie orientácie...
...chyba spôsobená jedným chybným znakom v poslanej riadiacej sekvencii
spôsobila stratu celej sondy
Mars 4 & 7
Ariane 5$500 million
Ariane 5$500 million
converting 64-bit float to 16-bit integer
priceless
Ariane 5$500 million
converting 64-bit float to 16-bit integer
L_M_BV_32 := TBD.T_ENTIER_32S ((1.0/C_M_LSB_BV) * G_M_INFO_DERIVE(T_ALG.E_BV));if L_M_BV_32 > 32767 then P_M_DERIVE(T_ALG.E_BV) := 16#7FFF#;elsif L_M_BV_32 < -‐32768 then P_M_DERIVE(T_ALG.E_BV) := 16#8000#;else P_M_DERIVE(T_ALG.E_BV) := UC_16S_EN_16NS(TDB.T_ENTIER_16S(L_M_BV_32));end if;
P_M_DERIVE(T_ALG.E_BH) := UC_16S_EN_16NS (TDB.T_ENTIER_16S ((1.0/C_M_LSB_BH) * G_M_INFO_DERIVE(T_ALG.E_BH)));
L_M_BV_32 := TBD.T_ENTIER_32S ((1.0/C_M_LSB_BV) * G_M_INFO_DERIVE(T_ALG.E_BV));if L_M_BV_32 > 32767 then P_M_DERIVE(T_ALG.E_BV) := 16#7FFF#;elsif L_M_BV_32 < -‐32768 then P_M_DERIVE(T_ALG.E_BV) := 16#8000#;else P_M_DERIVE(T_ALG.E_BV) := UC_16S_EN_16NS(TDB.T_ENTIER_16S(L_M_BV_32));end if;
P_M_DERIVE(T_ALG.E_BH) := UC_16S_EN_16NS (TDB.T_ENTIER_16S ((1.0/C_M_LSB_BH) * G_M_INFO_DERIVE(T_ALG.E_BH)));
} KONTROLA PRETEČENIA AJ PODTEČENIA
chyba za $500 000 000
L_M_BV_32 := TBD.T_ENTIER_32S ((1.0/C_M_LSB_BV) * G_M_INFO_DERIVE(T_ALG.E_BV));if L_M_BV_32 > 32767 then P_M_DERIVE(T_ALG.E_BV) := 16#7FFF#;elsif L_M_BV_32 < -‐32768 then P_M_DERIVE(T_ALG.E_BV) := 16#8000#;else P_M_DERIVE(T_ALG.E_BV) := UC_16S_EN_16NS(TDB.T_ENTIER_16S(L_M_BV_32));end if;
P_M_DERIVE(T_ALG.E_BH) := UC_16S_EN_16NS (TDB.T_ENTIER_16S ((1.0/C_M_LSB_BH) * G_M_INFO_DERIVE(T_ALG.E_BH)));
Mars Climate Orbiter
$328 million
lbf×svs
N×s
Phobos Grunt
$64.4 million
Cygnus & ISS
10 vs 13 bit
10 vs 13 bit
0 (000000000000 in bits) 1023 (111111111111 in bits)
1980
August 1999
10 vs 13 bit
0 (000000000000000 in bits) 1023 (000111111111111 in bits)
0 (000000000000 in bits) 1023 (111111111111 in bits)
6-metrová prasklina
