Spare part demand quantity calculation method for multiple sets of equipment
A calculation method and demand technology, applied in calculation, manufacturing calculation system, computer-aided design, etc., can solve the problem that the utilization efficiency of spare parts is not the maximum
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[0077] There are 3 types of units in a certain type of equipment, the life of the first type of units obeys the exponential distribution Exp(0.002), and the price is 100 yuan; the life of the second type of units obeys the normal distribution of N(600,130 2 ), the price is 150 yuan; Type 3 unit life obeys the Weibull distribution W(600,1.8), and the price is 200 yuan. There are 5 sets of this type of equipment, and the accumulative working time of the equipment is T=500h. Now these 5 pieces of equipment are about to be overhauled. After the overhaul is completed, the number of intact equipment is N ok The probability P(N ok ≥4) greater than or equal to 0.85. Calculate the demand for spare parts required for each type of unit in this maintenance work.
[0078] The calculation steps are as follows:
[0079] Step S1, in a traversal manner, generate a description of all "Nz sets of equipment with a good number greater than or equal to N min ” The matrix Zok of the situation. ...
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