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Recurring meetings weekly Thursday at 11ET

Solar Power

• Strategy has model for sun intensity

• To sync with what inputs/outputs are

• Input lat/long + time of day

• Get out solar irradiance

Array Size

• 256 cells * 153cm2 = 3.9168m2

• 1000W/m2: 3.62W

Solar Cell configuration

• Former user (Deleted) to give cell normal angle for each array

  • Later forest to give angle for each cell

• Ryan Lam Rodrigo Tiscareno Look at legacy code and see what translates over

Optimal speed model Rodrigo Tiscareno Ryan Lam

• Inputs: Cd, A, wind speed, air density, weight, rolling resistance, system (mostly motor) efficiency curve (not constant for all loads)

  • Information that tells you how much energy you will need to move the car

  • Former user (Deleted) to provide vehicle parameters

• Priority 1: Make sure we can get to EOD checkpoint in time

• Priority 2: Drive at speed at which the least energy is spent to move a given distance (Wh/km)

• General info

  • rolling resistance is mostly constant per given distance

  • air resistance is proportional to velocity squared

  • wind direction and speed will influence air resistance

  • road material/condition will influence rolling resistance (can be a lot)

  • looking for point at which derivative of speed with respect to power = 0

Motor Max Power Model

• What is the steepest grade in the route

• On that steepest grade in varying wind conditions what is the motor power required to maintain our most optimal speed

Vehicle Passing Model

• What is the power and energy consumption we would need to pass another car

  • How do we pass cars efficiently

  • Passing cars means going fater than our optimal speed and also requiring the system to privide a large burst load of power

    • This causes efficiency losses

    • If we succeed in passing how much extra power did that use compared to if that car wasn’t there

    • If we fail or succeed in passing how much do we gain compared to just staying behind that car at a slightly less optimal speed