What does SSE stand for?

It can be clearly seen that the system locks onto the input but with a steady state error.

In order to realize fast motion with small overshoot, the PID controller is optimized by considering the following desired specifications: * Overshoot [less than or equal to] 2 * Settling time [less than or equal to] 5 s * Steady state error [less than or equal to] [+ or -] 1% Moreover, in order to suppress the swing angle quickly, the PD controller is optimized based on the following desired specifications: * Settling time [less than or equal to] 5 s * Residual swing [less than or equal to] [+ or -]0.

It is understood, however, that the forces acting on the valve pin due to the viscous flow of the polymer melt will tend to generate a steady state error in the outlet pressure that is a function of the flow rate and melt viscosity.