Adjustable gain controller for valve position control loop and method for reducing jitter

摘要: An adjustable gain controller for a steam turbine valve position control loop includes an electronic operator, proportional controller, derivative and integral controller. A flow condition error signal is amplified by the reciprocal of valve's regulation value. The supplied to operator means initially selecting value n generating factor from nonlinear characteristic function utilizing those values in combination with normalized signal. multiplies applies resultant output signals proportional, controllers are summed together that sum input into electrohydraulic actuator system. directly positions valve. Hydraulic mechanical jitter reduced adjusting reduce