The calculation of Mean Time Between Failure (MTBF) is often required as an aid in predicting the reliability of electronic equipment under different operating conditions.
The value of MTBF for a component is based upon failure-rate models which have been developed in conjunction with MIL-HDBK-217E. The MTBF is not a guarantee of useable product lifetime, but is a guide for planning the operational use of the equipment. The accuracy of the values calculated is dependent upon the validity of the models. Also, the values chosen for the operating parameters must be representative of the operating parameters during actual use
In the case of fiber optic data communication equipment,an area of primary concern is the MTBF values for the discrete Light Emitting Diodes (LEDs) and photodiodes used in the fiber optic transmitters and receivers. The determination of the predicted MTBF for an LED or
photodiode is a calculation using the part failure-rate model for optoelectronic devices as found in section 5.1.3.10 of MIL-HDBK-217E.
发表于 2012-5-17 23:37:17
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