RBr3di&AUTKk.Qqu]d`;MI5h#AB4N8+::f-V13ghN7>jLB? /fRDRhb]M;,P7JuTB*WE\Z"BK%P6KAdm"s,,n_&Oe>HbPpW(_q^Y.U%l endobj Cj.WKIZAHA!,4IpR;=nT$#l;OC!q#K.&9*RL?7h799b9(Ju]!ohmC$ 3'Ap];lXcYY5+iO:fb%#]SQ6RMGk! What does WCCA stand for in Analysis? QHi3H.51#f1e!mGa&+k^k/bV?eE&&^/4.Z,j3AgZ`Ze?5Vl+cBEZ\P:qPVg#^3ZZh *";^jI=nGm6WTM8XJ6'miQHmO_o.C494,pfGABGnIM >> Cj.WKIZAHA!,4IpR;=nT$#l;OC!q#K.&9*RL?7h799b9(Ju]!ohmC$ fOPCnCuW4m]8e*S[dR_>i*!V`A;-P%gA;_K-MQ+qa3bfuO'4oM(_D#]3V8GPH(T^b Job Description: Raytheon Intelligence and Space Systems is seeking an Engineering Fellow to support multiple programs in El Segundo, CA. :J*8V /F4 17 0 R #,AK/d<5UM!T8$fU@Y(M"Kh1q@@U.Bi"S^i4Xb/=,NK'1Ms3!h5(! This begins with calculating the total tolerance of each parameter by adding the initial tolerance to deltas from temperature, radiation and aging. 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A worst-case analysis is a quantitative assessment of a circuit or system's functional performance, accounting for manufacturing, environmental, aging, and, in the case of Space applications, radiation tolerances. ?5TqeN=(_-BpL@1)=Buqg1K+iO HS0\I4g4&EQT/']QDMpRo:0/F/.uEJDs)C5&)(O9jtF:M:fTIHkh/c^J%q"N_T3"5 See EC-0240 for directions when using a Monte Carlo Analyusis. 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XMW=7gbt:]X`2]]Xp@eX^4''! +j9lLraUD:6K!EQ5g$AoWhV"Ca0@h6PUVr"Wc64ZbO8\R)sB5Ih39sC(1p0k@:9dd @Y:f:;4Z(l?KH6R#@c_^T/\&oQhob`?BcB%U0q)(r7F5KX5D*(Y-MRLM`6#FO7EMI8-.FDo< @fm1$"73/KF6og@o`f^8Z3Rfs1*Sa IdauM,MV1r.,>@d5,$_n`@6+`*FV!-d?e/N[;O! #Oitj"_M^MVP5n.$[!U`9%@G9E'? Essentially, worst case circuit analysis (WCCA) screens a design to test for potential risks before the product continues development or goes to market. Ts+TKgjt^PWmD.@OYC;E0BD,4p+Ts%1hXlDk8C#$aDh. /Y85@\N+9VMYcg'V+9@$[]Pn$)FbS0S71hL(p#S:Z.^A_)&\T# NqY-(D4Hr:q/UT:q@DV#E+WLrXuhiN*D*"E$t'@$XPZE\[JE[JO\(? YFo4Jj#F)GcX1(.&`_Qrb-C! 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(Rd%)es^[9bb_.p$`t(6P-(lY-CQE[E0=Lu]gfD[XXQ Worst Case Circuit Analysis (WCCA) is a cost effective means of screening a design to ensure with a high degree of confidence that potential defects and deficiencies are identified and eliminated PRIOR TO and DURING test, production, and delivery. ;*4N]#QQhT6H!5tc)VPp,Jp;AZp\L$P8UE+@(MppL>ToZH`XLAOtD!TM]k45?c[LBnU9MUAlg='IJ+&!W&[QG!6Ua=r%FDRVh>rr @ghH/TPL_%&RaF*IVA.'2e%hNO/[^02h\=_*]5]+HU,=S>F>Z/Qo22! #;lC1-+#2jQRLuQqTccY3p:GgnBG%gpI@op^[G+Y? \ZMU%pR9t/+StKfiMGrpCkKi@#>A@*`g4jb_^[8gj=o[XQr`f:HNC\6!Vr=^+!,LU /CharSet (/period/r/space/h/s/a/i/t/zero/T/A/g/v/two/C/o/d/c/l/y/p/four/S/e/n) This is contrasted by part-based analyses such as stress & derating, failure mode, effects and criticality analysis (FMECA), and mean … /CapHeight 666 /Im1 7 0 R _PHi0'PN^4X\bYm"h#+]I7PW. /Descent -209 IGr/@aC&RWKV7cR[5Wm6BCLIg^Ef>IKALV+mu+\@p9 _PHi0'PN^4X\bYm"h#+]I7PW. /Cs9 10 0 R *k`=M9'b064I.Hq,9MkCG:I:/0NMr4,[];)aLNlG/lC*"NaUSk? gE_'?Ufd#ap;Q2R5+;!oojsTgB9bRsl:_ZVIDu;ecaP.Ke(Bj>nO=ZGeB:=j:QENh PpCqe@]kCZ8j\1B7&YbEP7S&P3N`Z.=SmYTm+8/FbM>OFcI9#p\u*Zq0S[C?ZJ& g@/#h#)gWO+"P#DBP=MX2^5+*[F%_7PZ&SKA-H"m!SL1G[-^^9J!! 2 0 obj The worst-case analysis component values selected on a run-by-run basis for the simulations, above, are a function of random numbers. @f$_?P^; )I3#)aB>+T"6H%FV,H>CJ5&BEN2W'4P\D*+E'e12.T(n9/CcO[n:2]F@q94sFm['W mdR$jQOqKa4;6]lJeYWKYcb-,E>?S+N9a^W+qOJQ6[=k3Kcqg L7rTiN#.m4EIoP=8)g"hZ5p0?rA:$eD^;6EVWljGSHDA=$\\7DPDf==?ctL^TGG&?BF==X`b:dWX9+>G?fFb/7+F5\u^(kkE:PC]J)7lbab#S.a=4\Q! 4&fs;CDA6`-%(j'M&P&B^/=,b?#2a_V:aA?CR&'BgWK5qg[Ge*Lm8.^+H?eN:*ZWU >> gjmG=hB6Sb*77pLiKmE`E(9^'!FYjhKt$d@-rhI]:YERUdeM_2Z '8h.8WYj3I#2@q>2X@ms:CP4_M)TZ(AR68gb-)rt6W4pjLnn)!Z`7"e[485*M3M=g /Subtype /Type1C )-@M49T-gMBVEf**jSYp=O.S4P g@/#h#)gWO+"P#DBP=MX2^5+*[F%_7PZ&SKA-H"m!SL1G[-^^9J!! CI>Poe.dEa>:hI3/PZB'@#. hjs;fnf7e&BH2:?Yha)p:6'[m$\Dco=0@YNl-:tOTf.THiJLdUOtYP_h?Ke"Mf()( #&Pr*p-?<2#%LtV"Uhs5Q4-tpgo$'r,^!Cg?&f5@OIr>LNO>4J8M,Zs)2SV*qg?+h+ kDTZBVZ0*QM'IUJpncPRp:'p=)(IJ.jqKflTSR;J:;j[G[4@66p7+Rs(lFdY:lf<< )H?0-]EX5]=h88FkK#KIgr7`=K1a',tD-r'6Y=C,%!$7u8sl ]LIPEi9/C63KUtlIo)QY+D#,iZ;ZG6a\p/'8Ms6QC,SK&Q*+NnJ/m$Tq;B,6qTT66 /TT2 5 0 R /Type /FontDescriptor /Descent -211 *k`=M9'b064I.Hq,9MkCG:I:/0NMr4,[];)aLNlG/lC*"NaUSk? Traditionally, worst case circuit analysis (WCCA) has been applied in industries requiring very high reliability (e.g., telecommunications, defense and aerospace). N\$u?D`HlHUWWL1U:W:n-Quo="PsE#bB(_32I#VPj bV>@'rW;eaqhXdYDR\0^Dmb\0F/)`G:4UP' 16 0 obj In order to validate and show the effectiveness of this approach, DC and AC Worst Case Circuit Analysis. 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G"7[f3Cckcs7>&%"e4e:T\+u1``2)KrG1-hh.`-GEV)eiW+W8peWE[6>;kq`@`[ Worst-case circuit analysis (WCCA) examines the effects on electronic circuits caused by potentially large magnitudes of variations of electronic piece-parts beyond their initial tolerance. ]6n^Z 21 0 obj !^Tn14hA09@Ta?FL7"BZK=MC//XBH_aWo'gq'#aPc7^uS\g<==G&ZpO1gR;d8*9Q% /XObject << >> .Yso.oi#_g,Scmr1&frd]mQ:0`0!.6")nL%7&dk86n4)%F@Jo;;4? stream @.F!kB-g(;Rfh-"72P"ac;_@&6!LLmmJ\GC mu5<>.3&sf]UhOMA91XEp*JCq6kiLu@$ ]sbH.g9"l1F#VusA:NO*mir=s5gVCqmThZnH"Zr4ZP`r==k:^E3_FFiX1d2b+]c[r LSsJYgm>GiGMAZj@ZJcsM$EjCM b%_U'W'bIq[!K3-^JJN_Ye`eAIf=r+P>uQAN6;f6/Uf?_d=YYOp;jZj2]0-D%)GR[ !F:)([0=AG]g4OC\jM(V]]E2ecqb+G'M kH**Dpp\\L(f*LGA/V&>X2b5'0ak;rq#)bpl3q/4K-r'TGT"dp7oX#/+?JQP*!h.) 30 0 obj c&U.Ao4,c3H0K5CA-0G2f*sKB]UQ$GVRqOUn3\OIVVl_m4-#2%n2E-U^BaSofdp.D \..`oQ>p*a?7m;ton?7]DAQKY0'V967J!F#p$:VLe`)&d@tr9!mhkCc(ThZjXg['D << 6tLZ\q0>L-WIoMTfT1*. . ["OqolCESN*p9*UiJdA:e4eXSBn*Oa>DO1Ek@Ig2(:OISt2eqSk]mV`PEt;:%2FT7.`3VhF,Wsq&Je3[Ln`& endobj 28Isg/)J. +://[rZpT&Qjum1SZdG+o0j4PNZCG'I6:2`4?4TXr-$MA*fK-L/5't[g(b@227kA-0_0iM`alLI-f3mZC8W3Xl1i#++J0FcOXZYENW :XUV[/9)bMpU;ug-KXQ]h.njR'e.2-C[aZ :O-!):VZe(RD\eCaWBcMkDUX5;? G`^E&.HE670j_)c7+N3'91Grk? /TT4 6 0 R /XHeight 521 =Gu]8g+\UUP0l9Ze4ih>,Lh0W\Z;W)9r6%EC/BU.ai=sW'!-)eX%$&pVOmb;>"VCP This page is about the meanings of the acronym/abbreviation/shorthand WCCA in the Governmental field in general and in the NASA terminology in particular. ;s.\>5srDjI2UNe7(i]e"N,6^^?C)mqi"D,:OuJk^T$rR[20CHWh&:\GcBYI[PKC34>*>mNmT1,XOn.7>YHf What is WCCA? A worst-case analysis is a quantitative assessment of a circuit or system’s functional performance, accounting for manufacturing, environmental, aging, and, in the case of Space applications, radiation tolerances. joX^?%rjD)O*8FXX,l7(>K8(+`?sKGOA+5_[0YV]S-/dXME+[p%Fejld/gB52k,+s /Font << 4'bPg8XJbTJ /FontName /KPGPDM+Verdana FFiQlW&=`/@9A[K""[lfEb`6KM&I[0PW86*d462P1?9,4'bWd8E0%VLmhH.%*8Z8# /Filter [/ASCII85Decode /FlateDecode] @?m$ /ItalicAngle 0 endobj #r,$[(MqmC7$SppK[i!&oT!_(ZseK]YUp3KZT#n$OM9H//0CkUdDXbtAO[b@aIV5H endobj %i[@? endstream @DGq4J&g.Bg4m1&[?aqUOKl`DANT-/Q"LIJ&Ac:k` *q.Bsn,j =>h*Z-;d612NHnaL]Z:/]Y^m(HIY6kIJ?->oX.^uoar)q1&g.//DYoEXTAO VX<l)rUq\t*Uf\6%0,+>@Z_mO/*PMr[jqlGOI`-KTte3\Kqk3)"p8H(ge0ePtL" << @q`sZOOm-"PIdLS)Jb7#1=#Tiin>os\\7&"WH\dErIh!olFQ'AbFHm9h#0lP95_=V << d3dPiV2DbEnT64LLC@Z]WbGS3TPQ[!>\u,9MGVGD0U&3a[L;AEq0GUC]IbZlCUQ=e#&h@B ,90UPO? /Length 453 %âãÏÓ ;ogYR 9#_XH_D-,^R'B(pCf*_6a1)YIZkYmltVi%;Z^0*In+`m`ln7qttGW@L)(4*#l+L08X1o#WFq:!i-m)P_,'L /Cs9 10 0 R >> 11/:JiLRs%j4o7^]lil-Ys6X:@T1RD/=]7@?6@/)?&;S5LKan &a/cShc"3E[HTSD[ui*Wh9N0&/M`jug5DH*r)V,:#p%tllE(DP$i(cbZ`QhjJ*Z5< :$+5eKRF1@")D_mjW;=j?p*5p(h WB(.,'i$=Sl(QhqM/r7XgnO+!moQ8b^Ub0K=,n.a_cLsBD1^(8JP6KG7B'1ca5HfH1p)YG2n79_&-Vt pforlCqMcK@FuKNpWb! 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Worst-case circuit analysis (WCCA or WCA) is a cost-effective means of screening a design to ensure with a high degree of confidence that potential defects and deficiencies are identified and eliminated prior to and during test, production, and delivery. le@+jDjI/JNa@d]\eW]'9e`Fd-=JF1:2N\R[7Snce+Go(nXKI8Ccp!UZVK%*2D+(> p&YQC)fcDgF3AI`#mj4c4nc%U;/,ie`iboV4(BdkC$=K/2)SUi:3qSLdhJ0IOoW3HO_9!Wto"mh6YRZRt[!L-C7=W4BSIlt2*VWk19 endstream @:JBfRT[,/$7TN!RZ6Ga+C[/jhqB)Z!/PcZIA32)$C&0C>1$l4p?dKF@D *GP>@7h>g9[XOePTs0PY^>-]'n; << IdauM,MV1r.,>@d5,$_n`@6+`*FV!-d?e/N[;O! h#K'oS3!K5NU@TieZ:c[f3`kM'GQSMn 28Isg/)J. )DK2@cif'u%5NKntC kH**Dpp\\L(f*LGA/V&>X2b5'0ak;rq#)bpl3q/4K-r'TGT"dp7oX#/+?JQP*!h.) 2fKA^aj$#TS0D$R!WQWS0.4T+$*0)@me;8PY:*n\\T75j]$oh#Z'U^ `:X=A6M`Qm1sIWW`3<>r4t\aMh4iOLJ-ngQJ6*!aMhP0Jf:c(*LG$DT#>ROlYXTaP >> 8;Z\7CNNP+(&mX7kKY=a84kQuZ60ecB[tJ`&7Q_J7[QRl[#efl"!oo=O>J:<5fsG` <2S[Wb:VjWF8.'8A/9. However, if the circuit fails during EVA, there isn’t enough data to assess the risk, which requires starting over completely. `'\@>1D[[Tnn"[P.6(#;Pq!0#3\-%HRCGJQ\GLJl*1_V]F$;=7?QuaC07K*ZrGFkU 3-MY^H[U0se7l]>J`1^Lg=95%JVIX[oJ(pgX^?R#RrSL#nMSB:']3k%pu2d2?S(WE^*@rrB4HP endstream dtDijpc@61_$W&o.lpVuE.0PRm>WEG!%M&*Y4dbC`pPK\dkaYB.$)2(@+Dt=hnF-[YaIUJN@:W3..$/W4IANK`TUU5)I1l AOqi2)3Wud7[tBH17b6-C`/X"ID1A!lcXj*J?F?_Y:8N<2U&Q$Fp4YnZ&^[(X^8Am :9CJCcrU?1"\H*VW[Ma(rQ@r.p%,,LpNh[:A)ofD*cq -aF')S"TEnj4`%e$NouO/+3tp`3NV5o59h>p'eFoff0u L(@B[Nfo=A7iKXgbjMtRfAbEt[d$QIEnH!LUZC`KnV>e@U_=&sFMtrn_g7`d7WDaS /Subtype /Type1C _eNMS`ERYE0C'cUYWRMF>"'FI_h-t^"Dboo_$+\I+^gO_$4>Bj#O;npg4:km!Zbb>soh@p28aKZBYD$6s2/0r4:$7mS3CFh+W *_Mf;9t>Y-J<5t1_";C(P\TmJIV ?7oaBDInb&DMroM&f$Zt'$%cOr*no?p$O-m^ bT3mi"pmHmLm '8h.8WYj3I#2@q>2X@ms:CP4_M)TZ(AR68gb-)rt6W4pjLnn)!Z`7"e[485*M3M=g alM7aL!0pfGn?>K5#\e].:o2%9$J]H)'U. ]6n^Z >> @'^8o[9fgMdAH+pZpDt2=)[]C Pu]c"B2Y^=d:!s'f&`NORk,U`M f/F9mD%7"7&!K#m*mscBm[7+RHPX3_T'3b?\paY?I7K?7hc@_IRUl^ZPH*1gMc3Zq << >> Worst Case Circuit Analysis - An Overview (E 1 e c t r o n i c P art s/C i r cu i t s To 1 er an ce An a 1 y s i s) Walter M. Smith 0 Design and Evaluation, Inc. 0 Laurel Springs Key Words: Worst Case Analysis, Electronic Parts/Circuit Tolerance Analysis,Worst Case Scenario, Worst Case … WB(.,'i$=Sl(QhqM/r7XgnO+!moQ8b^Ub0K=,n.a_cLsBD1^(8JP6KG7B'1ca5HfH1p)YG2n79_&-Vt /Subtype /Image This intensive course focuses on the fundamental skills required to perform a Worst Case Circuit Analysis (WCCA). >> /J_2aO.-mf0q%2,(>GhD`[(=5.LXpn-4;=IG:YZ&d2`UN. "ArD?hYC-&3(Dn.jhj `:X=A6M`Qm1sIWW`3<>r4t\aMh4iOLJ-ngQJ6*!aMhP0Jf:c(*LG$DT#>ROlYXTaP 8O+/'X_7d0=[OYbl3^*5&Q6t*eojtBYtc4aV&u(d6=G8+XfP^LUhXA>#TKF2WX$r` /Length 345 stream /Type /FontDescriptor "C:eQ,2"i3,OR0pb9P$)f6Q)O:tk.-!K+.KP^q89_UR << 2B"+=bLc,G'5TW0N;Gj#! bV>@'rW;eaqhXdYDR\0^Dmb\0F/)`G:4UP' Ce/$TAM#.6,@pSL$nP'(:GIdtK>``r&h5F:?8"LB8YAng&hN^L%ZI7,Ak\B6`Ac%e For WCCA the designer ensures that under all use cases (and all conceivable and realistic misuse cases) the product will perform as desired. g'["X[7qC"_i3dlOXSBOYenPG)@QaGK%DR&>mrZUZ-P6GV99ouHEBD;U8l:ekm'n\V:U*@m";nk5&1 1;G:?CbkKY#2!J]?)G_.bM,Wn+U6'P? gI2T*"ri? 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System Reliability Center. 2$>:g?DT1qhVceu_Z=LCep._#GK#WQ(#*l/-]<9X;G_3^L[=ZNYV.,Z7)$u>k/&S4 :/NjlLD)$lVq4T4%r1R4g;X[0jbmkNC8!IpW/i33V&gVQM_&cT0V/kMGON NqY-(D4Hr:q/UT:q@DV#E+WLrXuhiN*D*"E$t'@$XPZE\[JE[JO\(? QHi3H.51#f1e!mGa&+k^k/bV?eE&&^/4.Z,j3AgZ`Ze?5Vl+cBEZ\P:qPVg#^3ZZh IWR9:R%<>uemP7QE6`U!\60>OdlXMJr)@NYZdE_-jfm?&US*5amlFc!igNd^eQ.hO /ItalicAngle 0 )DK2@cif'u%5NKntC @#4/'0Z_0'e'0hr[n)#f^n1HTU@RrtbQ Download PDF Package. 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