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

Table 3

Variables used in dynamic equation.

Symbol	Specification
	Rotated angle of bracket release
	Rotated angle of pop-up guide
	Rotated angle of emergency pawl
	Force transmitted by actuator to bracket release
	Force transmitted by bracket release to pop-up guide
	Force transmitted by pop-up guide to latch
	Force transmitted by pop-up guide to emergency pawl
	Force transmitted by pin striker to emergency pawl
	Friction force between bracket release and pop-up guide, which is represented by multiplying rolling friction coefficient and the normal force
	Friction force between pop-up guide and emergency pawl, which is represented by multiplying the sliding friction coefficient and normal force
	Friction force between pin striker and emergency pawl, which is represented by multiplying the sliding friction coefficient and normal force