Ariane 5 failure
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The Ariane 5, developed by the European Space Agency, failed during its maiden flight on June 4, 1996, just 37 seconds after launch due to a software error in its inertial reference system. The failure resulted in a $370 million loss and delayed scientific research for nearly four years. This incident is considered one of the most significant software failures in history.
Ariane 5 failure
- 2. Introduction • Introduction to system • Who owns (Country/Organization etc) • When it was developed, cost • What is the purpose? • Explain disaster or failure • Cost of failure 2
- 3. 3 INTRODUCTION • Ariane 5 is a launch vehicle developed by the European space agency. • The maiden flight of Ariane 5 launcher took place on 4th June 1996. • 37 seconds into its ascent at an altitude of 3700m the launcher exploded. • An enquiry board submitted its report on the reasons of failure.
- 4. 4 WHO OWNS • Ariane 5 rockets are manufactured under the authority of the European Space Agency (ESA) and the French space agency Centre National d'Etudes Spatiales.
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- 7. When it was developed, cost Ariane 5 is Launch took place june 4,1996 • The rocket was on its first voyage, after a decade of development costing $7 billion. • The destroyed rocket and its cargo were valued at $500 million • 7
- 8. 8 What is the purpose • A board of inquiry investigated the causes of the explosion and in two weeks issued a report. • It turned out that the cause of the failure was a software error in the inertial reference system. • On 4 June 1996, the maiden flight of the Ariane 5 launcher ended in a failure.
- 9. YOU CAN GET IDEA FROM… 9
- 10. 10 • In general flight control system of the Ariane 5 is of standard design. • The attitude of the launcher and its movements in space are measured by an Inertial Reference system (SRI). • SRI has its internal computer in which angles and velocities are calculated. Explain disaster or failure
- 11. 11 • The data from the SRI are transmitted through data bus to on board computer. • The on-board computer (OBC), executes the flight program and controls the nozzles of the solid boosters and the cryogenic Vulcain engine, via servovalves and hydraulic actuators. • The design of the SRI used in Ariane 5 is almost identical to that of Ariane 4 Explain disaster or failure
- 12. 12 • software specifications from the Ariane 4, were reused in Ariane 5 but its flight path was different and beyond the range for which the code had been reused. • The disintegration occurred due to software exception of On board computer. • The software exception was caused during conversion of 64 bit floating point to 16 bit signed integer value. Explain disaster or failure
- 13. 13 • The disastrous launch cost approximately $370m, led to a public inquiry, and through the destruction of the rocket's payload, delayed scientific research into workings of the Earth's magnetosphere for almost 4 years. • The Ariane 5 launch is widely acknowledged as one of the most expensive software failures in history Cost of failure
- 14. Group Members • T.Priyanka - TG/2017/277 • R.N.H Vitharana -TG/2017/254 • A.M.A.N Senavirathna -TG/2017/275 14
- 15. Thank you 15