AVL ROADSIM 72" MIM TRUCK™ Chassis Dynamometer - Development
AVL ROADSIM 72" MIM TRUCK™ Chassis Dynamometer
AVL Approach
The cradled AC motor is arranged between two fixed rollers. It is designed for ideal road load simulation of vehicles. The mass simulation is realized electrically by the AC motor with a mechanical base inertia of the two rollers.
Benefits at a Glance
- Just a small pit is needed due to the compact 'motor-in-the-middle' design
- Highly accurate force and speed measurement chain through modern sensor equipment
- Dead weight calibration through zero without demounting of calibration device and zero-point shifting
Technical Data
The following specification shows typical values and is subject to change. Alternative technical configurations are available upon request.
|
Performance |
|
|
Nominal tractive force in motor mode (per axle) |
24,997N @ v≤65km/h |
|
Nominal power in motor mode (per axle) |
450kW @ v≥65km/h |
|
Max. speed |
160km/h |
|
Dimensions |
|
|
Roller diameter |
1,828.8mm |
|
Distance between outer roller edges |
3,000mm |
|
Distance between inner roller edges |
900mm |
|
Inertia simulation range |
|
|
Inertia simulation range (2WD) |
3,500kg … 30,000kg |
|
Roller set axle load |
|
|
Max. axle load |
20,000kg |
|
Measurement accuracy data |
|
|
Tolerance of tractive force measurement |
± 0.2% of full scale |
|
Tolerance of speed measurement |
±0.02km/h |
|
Control accuracy data |
|
|
Tolerance of tractive force control |
±0.4% of full scale |
|
Tolerance of speed control |
±0.1% of full scale |
|
Road load simulation |
|
|
Tolerance of inertia and road load simulation |
±1% of calculated value (but not better than force control) |
Measuring Principle
Tractive force
The tractive force is measured by a strain gauge sensor supporting the cradle mounted motor.
Speed
The speed is measured by an incremental encoder with two 90° shifted tracks with detection of the direction of rotation.