SIMULATION AND EFFICIENCY JUSTIFICATION
OF THE TWO-LOOP SYSTEM FOR CONTROLLING TURNING PROCESS WITH USING A HIGH-SPEED ACTUATOR 

Mostovoy Vladimir Dmitryevich, postgraduate student, Saratov State Technical University named after Y. A. Gagarin,
E-mail: mvd-bkp@mail.ru 
Biryukov Vladimir Petrovich, doctor of technical sciences, professor, sub-department of atomic energetics, Balakovo Institute of Engineering and Technology, E-mail: bvp-bittu@mail.ru

681.514 

Background. Adaptive control systems in engineering are the only way to compensate for the variable components of the cutting forces that result from the action of various perturbing influences on the cutting process. Therefore, their efficiency largely determines the accuracy, processing capacity and efficiency of modern machine tools. The purpose of this work is to investigate the possibility of increasing the effectiveness of cutting force control during turning by expanding the frequency range of effective work by
creating an additional control loop using a high-speed actuator.
Materials and methods. The solution of the problems of work was achieved by the method of mathematical modeling of the operation of local circuits and the entire system on the basis of theoretical and experimental models of the elements of the system and the control object with stepwise deterministic and stochastic driving and disturbing influences.
Results. The mathematical models of a high-speed actuating mechanism based on a piezoelectric actuator are constructed, the
process of cutting as a control object along a channel: longitudinal feeding is the cutting force, the possibility of parallel operation of two control loops for one input control parameter of the control object is investigated, The control system and the proposed dual-loop
control system.
Conclusions. The results of the simulation of the initial control system and the proposed two-loop system showed the possibility of two circuits operating for one control action by limiting the high-frequency control action in amplitude and with the decoupling
of the circuits in frequency based on the features of the frequency characteristics of the initial system, using as an actuator the electric motor and the high-speed actuator Based on a piezoelectric actuator, as well as high-frequency phi In the additional control loop. 

turning process, adaptive systems, mathematical modeling, dynamic properties, thin-film piezo actuator, frequency isolation of the control loops