TANDELTA OQSExISG2, Руководство пользователя

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With the following variable definitions.
12.6 Remaining Useful Life (RUL)
Remaining Useful Life is determined as the number of days that the oil can be used until it is
considered as being at the end of its useable life.
To establish the RUL at any point as a snapshot in time, we must first understand and establish
what is referred to as the “Median Rate of Change”, which is the rate of change in TDN over
the previous 6 hours (usually presented as a negative number).
We should also know the End of Life (EOL) TDN value for the oil in use (this is typically 300
TDN).
We can then use the following equation to calculate the Remaining Useful Life of the oil:
RUL = ((Oil EOL – Current Oil Condition) / Median RoC) / 4
For example:
Oil EOL = 300TDN
Current Oil Condition = 582TDN
Median rate of change over the last 6 hours = -2
𝑇̅
AvgTime
Average time at records
[𝑡
𝑐
, 𝑡
𝑐+𝐼
]
𝑜
OilCond Oil condition at record
𝑖
𝑂̅
AvgOilCond
Average oil at records
[𝑜
𝑐
, 𝑜
𝑐+𝐼
]