Identification of Mathematical Model Parameters of Control Unit of Autonomous Single-Stage Electro-Hydraulic Control Actuator

The article reports on static and dynamic (frequency) characteristics of control unit of autonomous single-stage electro-hydraulic steering machine, the data being obtained by the developed original experimental devices. The study introduces an engineering method for identifying the mathematical model parameters of a control unit according to the experimental static and dynamic characteristics. The parameter identification method of a second order link with classic dry (Coulomb) friction was tested on the example of real dynamic object parameter identification. This object is a mechanical part of the control unit of a steering machine. Findings of the research show that the natural frequency of the control unit mechanical part is almost 2 times less than the natural frequency of the entire control unit. This should be considered when designing and constructing such devices. The study shows that the developed mathematical model corresponds to the real characteristics of the control unit of the autonomous single-stage electro-hydraulic steering machine in a wide frequency range

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