// Nyquist plot, second order system
//gain
// time constant
// system with damped oscillation
// overdamped system
// transfer function of second order system in frequency response
// calculation
Nyquist plot is represented by a graph in polar coordinates. Axis x matches real part and y axis matches imaginary part of polar coordinates
// blue curve is Nyquist plot of system with damped oscillation, ξ1=0,5
// red curve is Nyquist plot of overdamped system, ξ2=2
// oscillation frequency of system with ξ1=0,1