This handbook provides guidelines to perform the worst case analysis. It applies to all electrical and electronic equipment. This worst case analysis (WCA) method can also be applied at subsystem level to justify electrical interface specifications and design margins for equipment. It applies to all project phases where electrical interface requirements are established and circuit design is carried out. The worst case analysis is generally carried out when designing the circuit. For selected circuitry, worst case analysis (WCA) can be used to validate a conceptual design approach.<\/p>\n
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|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | 1 Scope <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 2 References <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 3 Terms, definitions and abbreviated terms 3.1 Terms from other documents 3.2 Terms specific to the present document 3.2.1 ambient temperature 3.2.2 biased variation value 3.2.3 component parameters 3.2.4 component specification 3.2.5 design lifetime 3.2.6 effective ageing data 3.2.7 lifetime assumed in database 3.2.8 radiation <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 3.2.9 random variation value 3.2.10 reference condition 3.2.11 temperature assumed in database 3.2.12 variation factors 3.2.13 worst case 3.2.14 worst case analysis (WCA) 3.2.15 functional block 3.3 Abbreviated terms <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 4 General methodology 4.1 Introduction 4.2 Flow diagram of WCA <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 4.3 Identification of the critical aspects w.r.t. worst case performance 4.4 Evaluation of worst case performance <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 4.5 Comparison of WCA with requirements <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 5 Analysis parameters and technical issues 5.1 Definition of worst case parameters within parts database 5.1.1 Variation factors 5.1.1.1 General 5.1.1.2 Selection of reference condition 5.1.1.3 Compensation 5.1.1.4 Radiation <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 5.1.1.5 Temperature 5.1.1.6 Initial tolerance 5.1.1.7 Ageing <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 5.1.1.8 EMC and variation of electrical signals 5.1.2 Summary on deviations <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 5.2 Phase and timing considerations within the WCA 5.2.1 Introduction 5.2.2 Timing of transient pulses 5.2.2.1 General 5.2.2.2 Signal delays (and response times in digital circuits) 5.2.2.3 Phasing of repeating waveforms (such as sinusoidal signals) 5.3 Numerical analysis techniques 5.3.1 Approach <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 5.3.2 Extreme value analysis 5.3.3 Extreme value analysis combined approach 5.3.4 Root\ufffdsum\ufffdsquared analysis 5.3.5 Monte Carlo analysis <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 6 WCA and project phases <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Space product assurance. Worst case analysis<\/b><\/p>\n |