Page Comparison

Introduction

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• Parameters

  • v: (Numbers) final velocity of the car to accelerate to, (m/s)

  • vwind: (Numbers) velocity of the wind relative to the car, (m/s)

  • v_old: (Numbers) initial velocity of the car, (m/s)

  • theta: (Numbers) angle that must be climbed (radians) personally don’t understand why “climb” matters and not just angle of elevation

  • timestep: (Numbers) Time between measurements, (s)

    • usually calculated dist / ((v + old_v)/2), dist being the distance between two points in elevation profile, e_profile. v

• Returns

  • Fmotor: (Numbers) Force of motors required to achieve the movement specified by the parameter to accelerate to a certain velocity in a certain time (N)

• Calculations

Fa = self.m * (v - v_old) / timestep
Fmotor = Fa + Ffric + Fdrag + Fg

• Note

  • If v or v_old greater than maximum speed or less than minimum speed, it is caught in the function and whatever is out of bounds is set to maximum speed or minimum speed

  • Ffric, Fdrag , Fg , Fa, and ultimately Fmotor to be all calculated inside the function, using parameters and constants

The max_velocity() function

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• Parameters

  • v: (Numbers) final velocity of the car to accelerate to, (m/s)

  • vwind: (Numbers) velocity of the wind relative to the car, (m/s)

  • v_old: (Numbers) initial velocity of the car, (m/s)

  • theta: (Numbers) angle that must be climbed (radians) personally don’t understand why “climb” matters and not just angle of elevation

  • timestep: (Numbers) Time between measurements, (s)

    • usually calculated dist / ((v + old_v)/2), dist being the distance between two points in elevation profile, e_profile.

• Returns

  • Fmotor: (Numbers) Force of motors required to accelerate to a certain velocity in a certain time (N)

• Note

  • If v or v_old greater than maximum speed or less than minimum speed, it is caught in the function and whatever is out of bounds is set to maximum speed or minimum speed

  • Ffric, Fdrag , Fg , Fa, and ultimately Fmotor to be all calculated inside the function, using parameters and constants

The energy_used() function

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• Parameters

  • v: (Numbers) final velocity of the car to accelerate to, (m/s)

  • vwind: (Numbers) velocity of the wind relative to the car, (m/s)

  • v_old: (Numbers) initial velocity of the car, (m/s)

  • theta: (Numbers) angle that must be climbed (radians) personally don’t understand why “climb” matters and not just angle of elevation

  • timestep: (Numbers) Time between measurements, (s)

    • usually calculated dist / ((v + old_v)/2), dist being the distance between two points in elevation profile, e_profile.

• Returns

  • Fmotor: (Numbers) Force of motors required to accelerate to a certain velocity in a certain time (N)

• Note

  • If v or v_old greater than maximum speed or less than minimum speed, it is caught in the function and whatever is out of bounds is set to maximum speed or minimum speed

  • Ffric, Fdrag , Fg , Fa, and ultimately Fmotor to be all calculated inside the function, using parameters and constants

Sample code