Q3 A microprocessor system is used to control and monitor the lighting system at a theatre. A reliability analysis of th

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Q3 A Microprocessor System Is Used To Control And Monitor The Lighting System At A Theatre A Reliability Analysis Of Th 1 (68.95 KiB) Viewed 28 times

Q3 A microprocessor system is used to control and monitor the lighting system at a theatre. A reliability analysis of the above system revealed the following details (a) to (e). Design a fault tree diagram for the microprocessor system by using the correct elementary fault tree symbols. (a) (b) (c) (d) (e) The major failure event that the microprocessor will not operate is dependent upon either the single failure event of known cause (i.e., the microprocessor fails) or the major failure event that there is no current being supplied to the microprocessor. marks) The major failure event that there is no current being supplied to the microprocessor is dependent upon four mutually exclusive events as follows: 1. Major failure event-switch open. 2. Single failure event of known cause-open-circuit wiring failure. 3. Major failure event-fuse fails to open. 4. Single failure event of known cause power supply down. The major failure event of the switch being open is dependent upon two mutually exclusive events as follows: 1. Single failure event of known cause switch failure open. 2. Single failure event of unknown cause switch open. The major event that the fuse fails open is dependent upon two mutually exclusive events as follows: 1. Single failure event of known cause-fuse fails to open. 2. Major failure event overload in circuit. The major event of an overload in the circuit is dependent upon two mutually exclusive events as follows: 1. Single failure event of known cause short circuit in wiring. 2. Single failure event of known cause-surge on power supply.