Abstract

The engineering method for design calculation of electrohydraulic servo drive with throttle regulation is proposed. The method is adapted on drives of technological equipment, in particular, equipment for mechanical processing of materials. The engineering method allows determining the main parameters and choosing elements and devices of the drive, to predict its static and dynamic characteristics. As the input data are considered: maximum loading; maximum tracking speed without load; maximum tracking error (or allowable tracking error at maximum speed); piston stroke; reduced mass of moving parts. The method includes the following main stages: construction of the drive settlement scheme, choice of the working fluid and the nominal working pressure; calculation of the constructive parameters and choice of the hydraulic cylinder; choice of the electrohydraulic amplifier; definition of the feedback parameters, determining the drive quality factor and calculation the transfer coefficient of the electronic block; evaluation of the drive static characteristics, calculation of the speed and load characteristics; construction of the drive linear model, stability assessment; research of the drive dynamic characteristics and the control quality, drive correction. The example of the design calculation of the electrohydraulic servo drive for technological equipment is presented. For calculations used the MATLAB application package.

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