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SDV Telemetry Project |
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EV Development Process and Steps (With Smaple Data):
Step 1: Use case Identification
Step 2: Define Guidelines
Guidelines of Display Module (Setup)
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Module Name
...
Display Module (Setup)
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Guidelines
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· Switch OFF display while playing Radio/Audio. Display goes to screensaver if there is more than some minutes of inactivity and backlight off if
there is some other minutes of inactivity. Screen will not show anything unless activated or navigation is going on.
· Brightness should be Auto adjusted. Screen will be set to Auto Illumination automatically for ambient viewing if SOC is below certain level.
· Blue Light feature is used and adjusted. Blue Light Filtration will be set for optimum usage.
Guidelines of Sound Module (Setup)
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Module Name
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Sound Module (Setup)
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Guidelines
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· Premium Sound option will be made unavailable.
· Position will be fixed to the last set setting/optimum values.
· Sound Tuning will be made to the optimum value.
· Subsystem volume will be fixed to last set values/optimum values.
· Noise Cancellation will be switched off.
· Media/Radio option will be set on standby (except TA/Alarm Popup).
· Change of Levels Treble, Midrange and Bass (range: -10 to +10) can be disabled.
· Change of Levels for Beep, Ringtone and Alerts in the Head unit can be disabled.
· Media/Radio option will be set on standby (except the TA/Alarm Popup).
Step 3: Draw Sequence diagrams
1. Display (Settings)
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Module Name
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Display
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POU No.
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5.1.1
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Description/Objective
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Display Feature (Display Brightness, Display Off) Control
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Pre-condition
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ACC ON
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IGN ON
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O
...
O/X
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SOC Level
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<10%
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10-20%
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20 – 50 %
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Optimization Rules
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1)For 30 seconds of inactivity by user Display is turned off
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1) Screen will be set to Auto Illumination automatically for ambient viewing.
2) Blue Light Filtration will be set for optimum usage.
3)For 2 minutes of inactivity by user Display is turned off
1)For 5 minutes of inactivity by user Display is turned off
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Optimization Sequence Diagram
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...
User Impact
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User has to touch the head unit screen to turn on the display every time display is turned off
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Special Conditions
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1)While in Navigation and Telematics call, the feature shall be disabled
Test Results:
Energy Measurement Table | |||
Initial Brightness (%) | Einitial (Wh) | Efinal (Wh) | Esaving (%) |
100 | 18.83 | 13.917 | 26.088 |
80 | 17.772 | 13.741 | 22.684 |
60 | 16.59 | 13.544 | 18.359 |
40 | 15.535 | 13.368 | 13.947 |
20 | 14.202 | 13.146 | 7.439 |
2. Sound (Settings)
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Module Name
...
Sound
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POU No.
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5.2.1
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Description/Objective
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Sound Feature Control
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Pre-condition
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ACC ON
...
IGN ON
...
O
...
O/X
...
SOC Level
...
< 20 %
...
Optimization Rules
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1) Premium Sound option will be made unavailable.
2) Position will be fixed to the last set setting/optimum values.
3) Sound Tuning will be made to the optimum value.
4) Subsystem volume will be fixed to last set values/optimum values.
5) Noise Cancelation will be switched off.
...
Optimization Sequence Diagram
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User Impact
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Sound Quality of Output sound might be affected.
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Special Conditions
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Option will be given to driver to choose whether they want these harsh methods for battery saving.
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