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Dynamic preventive maintenance on the Smart‐L radar

Sierd Heida – Thales Nederland BV (April - December 2013)



SUMMARY

Critical parts of mechanical systems are usually maintained by preventive maintenance. In many applications maintenance is executed based on calendar time or used hours. This conservative approach can lead to either replacing the part too early (throwing away useful life of the part) or replacing the part too late (failure of the system).

Figure 1 SMART-L radar.

Figure 2 Loads affecting the radar bearing service life.

This research focuses on understanding the failure mechanisms of the main bearing of the Smart-L radar system. Translating the cause of the critical failure mechanisms into usage parameters opens the road to implement more dynamic based maintenance concepts. Due to the insight in the failure mechanisms a better prediction of the remaining useful life of the bearing can be achieved, which will reduce the costs of replacing too early or too late.

KEY RESULTS

Figure 3 Bearing life model.

Figure 4 Prediction of remaining useful life for various scenarios.