software errors in space
Post on 19-Jun-2015
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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
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