DYNAMIC-RESPONSE OF A SERVOVALVE CONTROLLED HYDRAULIC MOTOR DRIVEN CENTRIFUGAL PUMP

A servovalve controlled hydraulic motor driven centrifugal pump tvas d ynamically modelled using linearized analysis. The expressions for the system gain natural frequency, and damping ratio in terms of componen t physical parameters were derived. An optimization model estimation p rocedure was developed and applied to the step responses of such a sys tem constructed of common commercial components. The experimental syst em had a 4.2 Hz natural frequency and 1.2 damping ratio. The research indicates that the dynamic responses of a servovalve controlled centri fugal pump can be appropriately modelled for applications in industry and agriculture where the output flow rate needs to be dynamically cha nged.