Pressure/force controller

The setpoint generator is based on a 5-phase profile for defining the trajectory, that takes into account pressure ramps and their derivatives. Control is achieved using a conventional PID controller, with the integral component (I) adjusted in specific ways to prevent integral overshoot, oscillation, and drift.

Following the controller, an optional controller inversion is performed, along with downstream controller limiting and the integration of the valve characteristics as nonlinear control value compensation. This also integrates the characteristic flow parameters of the valve being used into the control system, ensuring a linearized control response and higher accuracy across the entire operating range.

The block diagram shows a graphical representation of the force/pressure controller:

• For explanations of the control parameters, see here: Init Parameter
• You can find explanations of the online parameters here: Online Parameter