METHOD FOR CONTROL OF LOADING DURING PROGRAM ENDURANCE TESTS OF MECHANICAL STRUCTURES Russian patent published in 2009 - IPC G05B19/00 

FIELD: mechanical engineering.

SUBSTANCE: invention refers to the field of automatic control systems for testing machines and benches for endurance tests of mechanical structures. It is achieved by means of the following: control signals at servo drive input are formed via setting extrema of program function, intermediate function values between extrema are interpolated, differences between actual load in local extrema and their program values are measured for each subgroup of the same local extrema. These differences are accumulated in several storages the number of which is equal to number of subgroups. Control signal extrema coming to servo drive are formed as sums of accumulated differences for each subgroup of local extrema and corresponding local extrema of the program. Span of each program section and arrival rate of all intermediate interpolated function values of this section to servo drive input is determined. It is determined as result of reference frequency division by the value proportional to section span.

EFFECT: lowering the loading error in extremum points of program to 0,1% and possibility to select optimal loading rate fro program sections with random span value.

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