A Model and a Task Scheduling Method for Double-Deep Tier-Captive SBS/RS With Alternative Elevator-Patterns
The last decade has brought the blooming of shuttle-based automated storage and retrieval system (SBS/RS) in many industrial applications thanks to its high throughput and expandability in handling mini-load commodity. In the paper, we focus on a double-deep tier-captive SBS/RS. Specifically, we pro...
Guardado en:
| Autores principales: | , , , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
IEEE
2021
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/4b1644100acc4976ab3ea68576641670 |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Sumario: | The last decade has brought the blooming of shuttle-based automated storage and retrieval system (SBS/RS) in many industrial applications thanks to its high throughput and expandability in handling mini-load commodity. In the paper, we focus on a double-deep tier-captive SBS/RS. Specifically, we propose a simulation model to support analyzing the performance related data of a double-deep tier-captive SBS/RS with both single-elevator and double-elevator patterns. The data includes shuttle carrier waiting time, elevator idle time, and total outbound time. Then, the impact of system performance due to two different elevator-patterns has been analyzed quantitatively. Based on the model, an optimization model and an improved NSGAII algorithm for task scheduling are designed, which can make the SBS/RS achieve the shortest shuttle carrier waiting time, rearrangement time and total outbound time. Experiments are conducted considering diverse task sizes and load factors, and the two elevator-patterns in a SBS/RS. The results show that our work can optimize the performance of the SBS/RS and assist stakeholders to decide more economical elevator-pattern. |
|---|