private double ki = 0.0D; // integral gain
// Constructor - unit proportional gain, zero integral gain
public PropInt(){
super("PI");
super.setSnumer(new ComplexPoly(0.0D, 1.0D));
super.setSdenom(new ComplexPoly(0.0D, 1.0D));
super.setZtransformMethod(1);
super.addDeadTimeExtras();
}