Investigation of the extreme electric drive control system of a metal cutting machine on a physical model.

Abstract

Systems of automatic optimization of the processing mode on metal-cutting machines ensure maximum performance or minimum cost of the cutting process. The integral form of the optimality criterion obtained for the processing mode, presented in the form of a stochastic process, is considered. On the basis of empirical stoichastic dependencies, a calculation is performed on the digital computer of the phase space of the processing mode, presented in the form of a quasistationary process. The result of the calculation gives an idea about the extreme properties of the cutting process and allows you to build a physical model of the automatic optimization system. The block diagram of the physical model is described and the work of its elements is considered. In the model, modeling of the main connections, inertia and disturbing influences of the real system has been carried out. The analysis of the model is made, and the requirements for the construction of a real control system are determined. The possibilities of setting up the system for self-oscillating and sliding modes of operation are shown. Oscillograms of the model operation modes are given when searching for an extremum and moving the working point along the right and left branches of the extreme characteristic. Ill. 4, bibl. four.