Open AccessСИНТЕЗ І НАПІВНАТУРНЕ МОДЕЛЮВАННЯ СИСТЕМИ УПРАВЛІННЯ ГІДРОПРИВОДУ З КОВЗНИМИ РЕЖИМАМИ
Author(s) -
А. Б. Жукевич,
О. А. Жукевич
Publication year - 2020
Publication title -
otkrytye informacionnye i kompʹûternye integrirovannye tehnologii
Language(s) - English
Resource type - Journals
eISSN - 2663-2411
pISSN - 2071-1077
DOI - 10.32620/oikit.2020.87.06
Subject(s) - hydraulic machinery , electro hydraulic actuator , hydraulic cylinder , control theory (sociology) , hydraulic motor , actuator , hydraulic fluid , control system , inertia , computer science , hydraulic circuit , hydraulic pump , engineering , control engineering , control (management) , mechanical engineering , physics , electrical engineering , classical mechanics , artificial intelligence
We consider the construction of servo-hydraulic drive of volumetric regulation system control relay type. A volumetric hydraulic actuator is used in agriculture, construction, transport machine, coal harvesters, rigs, airplanes, military machinery, etc. Hydraulic bulk drive have several advantages, most important of which are the possibility of obtaining a great effort, smooth operation, low inertia hydraulic machines, relatively high efficiency (up to 80%), high reliability. At the same time, he has a number of drawbacks, chief of which is the change in the properties of the working liquid during operation and under the influence of external factors. The disadvantages include loss of hydraulic oil, contamination of the liquid during operation. These shortcomings can lead to loss of quality control loss of accuracy, speed of working off of the set of control actions. One of the classes of systems which structurally provide high dynamic accuracy, there are systems operating in the sliding mode. In addition, due to the introduction of sliding mode in some cases it is possible to increase the degree of astaticism of the system, and hence to improve the playback quality of the input job. Proposed the implementation of a control system of hydraulic drive, is invariant to parametric and external disturbances through the use of sliding modes. To study the proposed control system with hydraulic drive constructed model of the developed system, which is the natural object of a hydraulic drive using its mathematical model, at the same time the control system is implemented physically is one that can be used in a real device. Hill simulation has allowed answering the questions of realization of sliding modes when controlling hydraulic drive of volumetric regulation through a DC motor. The behavior of a control system of hydraulic drive when changing the parameters of the control object (the moment of inertia, viscosity), which showed that the change of damping ratio within a wide range (up to 50% of the design) does not disrupt the sliding mode, the quality of the regulatory process does not deteriorate significantly. At the same time, the change to 100% conversion rate can lead to instability of the control system that allows to make a conclusion about the establishment of the position controller on the lesser of the possible damping coefficients. Also a study of digital implementation of the synthesized control law by introducing in the control loop time delay has been carried out, which is possible with the use of microprocessor-based calculator.