Optimization of Storage Location Assignment in Tier-To-Tier Shuttle-Based Storage and Retrieval Systems Based on Mixed Storage

Table 1

Basic equipment parameters.

Parameter name	Symbol	Parameter values
Cargo height		0.6 m
Cargo location length		0.8 m
Elevator acceleration		3 m/s^2
Maximum velocity of elevator		4 m/s
Elevator alignment time		0.5 s
Elevator pick-up (or delivery) time		1.5 s
Shuttle vehicle acceleration		2 m/s^2
Maximum velocity of shuttle vehicle		4 m/s
Shuttle vehicle alignment time		0.5 s
Shuttle vehicle pick-up (or delivery) time		3 s