What is the relation between PWM values and actual rotor speed of motors


#1

Product: Parrot AR Drone 2.0
Product version: [2.0]
SDK version: [2.0.1]
Use of libARController: [NO] (Only for ARSDK)
SDK platform: [Linux Ubuntu 14.04 32bit]
Reproductible with the official app: [Not tried]

After each flight, a text10 file is generated. The rotor speed of 4 motors are represented by 4 PWM values which varies between 0 and 255. What is the relation between PWM values and actual rotor speed of motors?

I am a university student doing research on the relation between drone’s behaviour and the rotor speed of motors, and I need you guys’ help.