A Dual-Observer Design for Nonlinear Suspension System Based on Feedback Linearization

Table 1

Values of quarter car model parameters.

Parameters	Symbols	Values	Unit
Quarter car sprung mass		210	kg
Quarter car un-sprung mass		43	kg
Tire stiffness coefficient		2.38e5	N.
Gas polytrophic exponent		1.4	-
Effective section area of the piston		0.0088	m^2
Volume of the air bag		0.0027	m^3
Static equilibrium pressure of the energy accumulator		5.8e5	Pa
Compressing stroke damping coefficient I		3430	N·s·
Compressing stroke damping coefficient II		631	N·s·
Compressing stroke throttle opening rate		-0.1	m·
Extending stroke damping coefficient I		4447	N·s·
Extending stroke damping coefficient II		1750	N·s·
Extending stroke throttle opening rate		0.3	m·