TRANSFER FUNCTION OF AN OPEN-CIRCUIT AUTOMATIC CONTROL SYSTEM WITH HYDRAULIC DRIVE
DOI:
https://doi.org/10.17721/2519-481X/2025/88-08Keywords:
control channel, automatic control system, transfer function, feedback, actuator, hydraulic system, fire vehicle, transport baseAbstract
The article derives the transfer function of the automatic control system with hydraulic cylinders as an actuator. The need to obtain a model is associated with the synthesis of one of the system channels.
The general automatic control system contains several control channels. The system is built for a specific object. This is a unified stabilization platform for an atypical firearm on a highly mobile transport base. One of the tasks of the automatic control system is to compensate for the impact of the use of a firearm. Control occurs according to the mathematical model of the firearm - vehicle object. The synthesis of feedback channels present in the system is not considered in the work. The main attention is paid to modeling processes in a channel without feedback. This option for constructing (the automatic control system channel) and choosing an actuator is due to the type of external influence on the control object (a short-term high-intensity pulse).
Mathematical modeling of the main components of an open system: a control signal source, a solenoid valve and a hydraulic cylinder was carried out taking into account the processes occurring in the elements of the system.
Based on the transfer functions of individual components, the general transfer function of the system (control channel) was determined. In addition, inertial characteristics arising from the mass of moving parts (piston, rod, load), damping factors and hydraulic dynamics were taken into account. As a result, a refined mathematical model of an automatic control system with a hydraulic drive was obtained, which reflects the dynamic properties of the system taking into account real physical processes.
The proposed approach can be used for further analysis of the stability and quality of control of hydraulic drives in industrial and transport applications.
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