Microprocessor applications in reentry vehicle testing

A system to test the Minuteman MK-12 reentry vehicle is being developed by Southwest Research Institute for use at Kelly AFB. The system will use several microprocessors to monitor and direct the test functions, control the flight environment equipment and measure reentry vehicle performance. Data acquired during the test are used for reliability scoring. The new system is intended to replace the original system which has been in operation sicne 1968. This paper will provide a description of each microprocessor system and its associated peripherals and software. Emphasis will be given to and distribution of critical tasks among processors and development of fault tolerant software in order to increase system reliability. Testing has been conducted for several years, revealing many areas that need improvement. Some of the problems encountered, and the solutions to those problems, will be discussed.