Abstract
According to characteristics of permanent magnet synchronous servo motor driven constant pump hydraulic system, and relevant parameters of the motor, the pump and the oil, an indirect measurement system for flow based on soft-sensing model is established. The measurement of the output flow of constant pump is realized easily by measuring the speed of the motor. And the accuracy of measurement of the model has been improved with the oil viscosity-temperature behavior, viscosity-pressure characteristic and the conditions fuzzy compensation coefficient. Experimental results show that the soft-sensing model is of enough accuracy and has an excellent response.
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