In Example 10.2, suppose that the vehicles operate according to the following scheduling rule in order to minimize the distances the vehicle travel empty: vehicles delivering raw work parts from station 1 to stations 2, 3, and 4 must pick up finished parts at these respective stations for delivery to station 5. (a) Determine the empty travel distances associated with each delivery and develop a from-to chart in the format of Table 10.5 (b) The AGVs travel at a speed of 50 m/min and the traffic factor = 0.90. Assume reliability = 100%. From Example 10.2, the delivery distance Ld = 103.8 m. Determine the value of Le. (c) How many automated guided vehicles will be required to operate the system?

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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In Example 10.2, suppose that the vehicles operate according to the following scheduling rule in order to minimize the distances the vehicle travel empty: vehicles delivering raw work parts from station 1 to stations 2, 3, and 4 must pick up finished parts at these respective stations for delivery to station 5. (a) Determine the empty travel distances associated with each delivery and develop a from-to chart in the format of Table 10.5 (b) The AGVs travel at a speed of 50 m/min and the traffic factor = 0.90. Assume reliability = 100%. From Example 10.2, the delivery distance Ld = 103.8 m. Determine the value of Le. (c) How many automated guided vehicles will be required to operate the system?

 

TABLE 10.5 From-To Chart Showing Flow Rates, loads/hr
(Value Before the Slash), and Travel Distances, m (Value After
the Slash), Between Stations in a Layout
To 1
2
3
109/50
From
20
300
40 0
LO
0
5
0
0
5/120
0
0
0
0
4
6/205
0
2/85
0
0
5
0
9/80
3/170
8/85
0
Transcribed Image Text:TABLE 10.5 From-To Chart Showing Flow Rates, loads/hr (Value Before the Slash), and Travel Distances, m (Value After the Slash), Between Stations in a Layout To 1 2 3 109/50 From 20 300 40 0 LO 0 5 0 0 5/120 0 0 0 0 4 6/205 0 2/85 0 0 5 0 9/80 3/170 8/85 0
EXAMPLE 10.2 Determining La for a More-Complex AGVS Layout
The layout for this example is shown in Figure 10.15, and the from-to chart is presented in Table 10.5. The AGVS includes load
station 1 where raw parts enter the system for delivery to any of three production stations 2, 3, and 4. Unload station 5 receives finished
parts from the production stations. Load and unload times at stations 1 and 5 are each 0.5 min. Production rates for each workstation are
indicated by the delivery requirements in Table 10.5 Q. A complicating factor is that some parts must be transshipped between stations 3
and 4. Vehicles move in the direction indicated by the arrows in the figure. Determine the average delivery distance, Ld.
4
Proc
Aut
35
15
AGV
50
Direction of
vehicle movement
10->>
3
0-→--
Unld
Man
Proc
Aut
-30
AGV
guide path
30
Proc
Aut
Load
Man
10->>
10->
1
50
30
Figure 10.15
AGVS layout for production system of Example 10.2 . Key: Proc = processing operation, Aut = automated, Unld = unload,
Man manual operation, dimensions in meters (m).
Transcribed Image Text:EXAMPLE 10.2 Determining La for a More-Complex AGVS Layout The layout for this example is shown in Figure 10.15, and the from-to chart is presented in Table 10.5. The AGVS includes load station 1 where raw parts enter the system for delivery to any of three production stations 2, 3, and 4. Unload station 5 receives finished parts from the production stations. Load and unload times at stations 1 and 5 are each 0.5 min. Production rates for each workstation are indicated by the delivery requirements in Table 10.5 Q. A complicating factor is that some parts must be transshipped between stations 3 and 4. Vehicles move in the direction indicated by the arrows in the figure. Determine the average delivery distance, Ld. 4 Proc Aut 35 15 AGV 50 Direction of vehicle movement 10->> 3 0-→-- Unld Man Proc Aut -30 AGV guide path 30 Proc Aut Load Man 10->> 10-> 1 50 30 Figure 10.15 AGVS layout for production system of Example 10.2 . Key: Proc = processing operation, Aut = automated, Unld = unload, Man manual operation, dimensions in meters (m).
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