A Shock Mitigation of Pedestrian-Vehicle Impact Using Active Hood Lift System: Deploying Time Investigation

Table 1

Material properties of AHLS.

Symbol	Value	Specification
	4.4 × 10^−5 m^4	Inertia moment of bracket release
	8.3 × 10^−5 m^4	Inertia moment of pop-up guide
	5.1 × 10^−5 m^4	Inertia moment of emergency pawl
	9.8 × 10^−4 m^4	Inertia moment of pop-up guide and pin striker, which rotate together after point (B)
	1 Nm/rad	Spring coefficient of spring installed at bracket release
	1 Nm/rad	Spring coefficient of spring installed at pop-up guide
	3 Nm/rad	Spring coefficient of spring installed at emergency pawl
	0.16	Coefficient of rolling friction
	0.3	Friction coefficient
	6.67 kg	Mass of hood that is lifted at latch part