CONTROL FOR A HYDRAULIC DRIVE

摘要

In a control for a drive pressurised by a working fluid, the working fluid flows through an eletrovalve which determines the amount of working fluid to be suplied to the drive. The electric signal which controls the valve is generated by a computer which continuously calculates a predetermined set value for the stroke, power or pressure of the drive. The calculation is based on at least one measured or simulated drive state quantity at the moment when the calculation is carried out and the calculated set value determines the intensity of an electric signal transmitted to the valve electric regulation arrangement. The speed of calculation of the computer which determines the set values is higher than the valve regulation speed.