Abstract
In order to solve the problem of precise positioning at micron level, a hydraulic system using servo motor and displacement amplifier hydraulic cylinder instead of servo valve is proposed. The simulation results show that the open-loop response speed of the system can be improved by increasing the elastic modulus of the oil and reducing the viscosity of the oil, while the pressure and volume of the accumulator have no obvious influence on the open-loop performance of the system. The micro displacement control hydraulic system is applied to the integrated test-bed, and PD controller is selected as the position controller according to the identification results. The validity and feasibility of the micro displacement control hydraulic system are verified.
Highlights
In order to solve the problem of precise positioning at micron level, a hydraulic system using servo motor and displacement amplifier hydraulic cylinder instead of servo valve is proposed
The simulation results show that the open-loop response speed of the system can be improved by increasing the elastic modulus of the oil and reducing the viscosity of the oil, while the pressure and volume of the accumulator have no obvious influence on the open-loop performance of the system
The hydraulic control system is an indispensable part of many machine tools, which has a key impact on the machining accuracy of the machine, such as the power slide hydraulic system of the combined machine tool, the hydraulic system of the press, the hydraulic system of the multi cylinder milling machine, etc [1]
Summary
The hydraulic control system is an indispensable part of many machine tools, which has a key impact on the machining accuracy of the machine, such as the power slide hydraulic system of the combined machine tool, the hydraulic system of the press, the hydraulic system of the multi cylinder milling machine, etc [1]. In view of the above problems, an improved micro stroke hydraulic control system for the power slide of modular machine tool is proposed. The servo valve element is removed, and the servo motor and displacement amplifying hydraulic cylinder are added to improve the control of oil flow rate. The accumulator element is connected to the oil return chamber of the hydraulic cylinder to ensure that the pressure and volume of the oil in the process of micro stroke control are in a stable state. Hydraulic transmission is a subject that studies the pressure fluid as the energy medium to realize various mechanical and automatic controls. The hydraulic transmission uses this kind of component to form all kinds of control circuits needed, and the transmission system which completes certain control functions is composed of several circuits to complete the transmission, conversion and control of energy
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