|
Rotary Racer - Car Performance
Dunsfold 2011-06-26
Results
After the wet and windy Goodwood, it was all change with hot and still conditions.
We had an excellent race managing a 1st place win and managing to beat
the maximum distance done on this circuit by a Greenpower car and with
the smaller batteries.
Car Computer Log
This shows the main items measured by the Rotary Racers car computer. They are:
| Item |
Description |
| Throttle |
The position of the twist grip throttle from 0 to 100% |
| MotorCtl |
The
motor power output setting. The Car computer sets the motor power based
on the drivers throttle position, the speed of the car and the current
being used. There is a software algorithm to implement this "drive by
wire" system. The Car computer drives the PWM (Pulse Width Modulation)
Motor Speed controller with a duty cycle proportional to this value. 0
- 100% |
| Speed |
The speed of the car in Km/H calculated from the magnetic read switch pulse generator by the Car Computer. |
| Voltage |
The batteries voltage under load. |
| Current |
The current being taken from the batteries. |
| Charge0 |
The
charge left in the battery pack 0. This is calculated by the car
computer using an algorithm that has been honed to match the battery
discharge curves for the Yuasa batteries. It currently bases its
results on the current being used from the battery. |
| Charge1 |
The
charge left in the battery pack 1. This is calculated by the car
computer using an algorithm that has been honed to match the battery
discharge curves for the Yuasa batteries. It currently bases its
results on the current being used from the battery. |
| Charge2 |
The charge left in the battery pack 2. This is calculated by the car
computer using an algorithm that has been honed to match the battery
discharge curves for the Yuasa batteries. It currently bases its
results on the current being used from the battery. |
| BatPack |
The
battery pack in use (0, 1 or 2), the turbo button (4) and the Pitstop
warning (8) . We generally change the battery pack with each driver
change. |
| Temp |
The Temperature of the motors casing in degrees C. |
| GPS |
GPS position, speed and time together with lap position information |
| Misc |
Other items describing the operation of the control system |
The graphs show the overall data, the actual ASCII data log files
are also available, from the links below, for detailed analysis.
Practice Laps Data
Notes
- The
Car was RR8g. This was the cars twelfth race.
- We used a 18:49 gear ratio after testing during practice sessions.
- An excellent first race and a great 1st place result.
|
