Realization of the Ultrasonic Motor Speed Control System Based on H-Bridge

Table 3

Parameters of the stator rotor contact simulation model.

Name	Meaning	Value	Name	Meaning	Value
n	Modal orders	9		Wavelength	18.29 × 10^−3 m
	Friction coefficient	0.1501	k	Wave numbers
	Rotor equivalent mass	0.00811 kg	J	Moment of inertia	3.5 × 10^−6 kg • m^2
cN	Equivalent elasticity	2.6 × 10^9 N/m^2	dz	Damping coefficient	15000
h0	Half of equivalent thickness	7 × 10^−3 m	FN	Rotor preload	200 N
R	Equivalent radius of rotor	26.62 × 10^−3 m	TL	Load torque	0 N • m