HI. Truck Models
- iarmstrong
- Peter Chillemi
In the Models step enter truck data to calculate acceleration, deceleration, axle loading, fuel burn, as well as battery trucks and trolley assist recharging parameters.
Truck List
On the left-hand side is the truck list. You can have as many trucks as you would like to evaluate.
You can edit names of added trucks, delete, move them up and down in the list, as well as export to “.opentruck” file.
Press Add Truck button to add a new truck to your project. You can:
add a default truck,
or import it from a file or library.
You may choose to use a “.ATR” from Talpac, but we prefer the “.opentruck”/“.opentruck2”. These have been carefully digitised and cross-checked straight out of the manufacturer's handbook.
If you are querying from a scheduling package, the truck names must match what is in the scheduler.
Truck Library
Truck files can be downloaded from the Alastri truck library.
There is an extensive library of modern trucks in the Trucks section on the website.
If you have a truck that is not in the list, please let us know (contact alastrisupport@micromine.com).
Note, that if you need fuel burn information for the specific truck type, please source it and provide it to us, and we will digitise it for you and add to the library, if applicable.
Truck Creator
You can also digitise the required trucks yourself, using the Truck Creator functionality, provided in the Tools dropdown.
To digitise a truck of interest using the Truck Creator tool, you will need to find and download the manufacturer's data sheet/specifications for that truck model.
The specification must include the following data:
Weight: empty (unladen) weight, maximum payload capacity (payload), gross weight.
Truck weight distribution on axles, % front/rear, unladen/laden.
Towing and Braking performance.
Fuel consumption, if applicable.
Please note that the specifications available in the Internet may differ by country and product type, even if the model name is the same. Therefore, when searching, stick to the data applicable to the particular model of truck used in your operation.
For detailed instructions on the trucks digitising see HI. Truck Creator.
Axle Data
Each row represents one axle on the truck.
A “driven” axle is connected to the drive train.
Each axle has a number of tyres.
Each axle has a loaded and unloaded weight on it.
This is used for the TKPH tyre-loading calculations and full/empty travel times.
Curves
The available curves are Rimpull, Retard, Fuel, Trolley Assist Rimpull, Battery Usage, Trolley Usage, Battery Regen and Regen Force.
Turn curves on and off using flags in the Active column. If some curves are not applicable to your truck, select (none).
Curves are digitized out of the manufacturer's handbooks. For better accuracy, calibrate with data from your fleet management system.
Click in the graph area to manually show a point.
Speed (km/h) and Force (kgf) values cannot be edited here, but can be copied into and pasted from Microsoft Excel using Copy to Clipboard and Paste from Excel buttons.
When editing and pasting curves data, the first Speed (km/h) value should always be 0.00.
Rimpull Curve
Available rimpull is a function of the gear ratios and the rolling radius of the machine. Haul Infinity uses the rimpull curves and the axle weights to derive an acceleration from the current vehicle speed.
Rimpull curves show the propulsion force in kilograms (kgF) against truck velocity (km/h).
For mechanical trucks, the rimpull curve shows a characteristic series of humps as the transmission steps down through different gear ratios.
Electric trucks typically show a smoother rimpull profile.
T = motor torque;
F = rimpull force;
r = rolling radius of driven tires;
G = gear reduction ratio between motors and driven wheels;
N = number of driving motors;
T = (F * r) / (G * N);Electric drive trucks have a smoother profile because there is no gear discontinuity. For electric drive trucks that do not have gears, rimpull can be approximated as the effective engine power divided by the velocity.
P = power;
F = force;
V = velocity;
F = P / V;
Retard Curve
Braking curves are not used to calculate stopping distances.
The deceleration properties are set in Setup > Settings > Acceleration.
In the presence of regenerative braking (for Battery Power trucks), this remains to be the normal non regenerative brakes.
If multiple retard curves available for the imported truck file, compare and select the one applicable for the truck used on your site.
Fuel Curve
Fuel curves match the fuel rate to the engine load.
Calibrate this graph with data from the fleet management system.
This applies to the fuel powered trucks. Fuel curves are not needed for use with battery powered truck.
Trolley Assist Rimpull Curve
Trolley assisted haulage involves feeding power to haul trucks from overhead lines.
Segments have a trolley property. When toggled on, the truck switches to the trolley rimpull curve while traversing the segment.
Data will be available in:
Network > Cycle Time Analysis tab:
Network > Charts tab:
Battery Usage Curve
Haul Infinity uses this to calculate total battery energy used on each haul cycle if the trucks power source is Battery (Setup > Trucks > Limits > Power Source > Power Source Type).
Trolley Usage Curve
Electric trucks are often capable of delivering significantly more power at the wheels while attached to a trolley, which results in a higher power draw. The amount of power used is captured via the Trolley Usage curve, ensuring accurate reporting for capacity planning.
The Trolley Usage curve will only be relevant if you have powered trolley in your mine (on ramps, etc). If you are not modelling trolley usage it can be ignored.
Battery Regen Curve
Haul Infinity uses this to calculate total battery energy restored on each haul cycle if the trucks power source is Battery (Setup > Trucks > Limits > Power Source > Power Source Type).
Regen Force Curve
This is not used to calculate max safe downhill speeds like the retard curve, and is just used to calculate the amount of the braking force produced by regenerative braking.
ATS / APS integration
All battery related cycle time information is exposed into APS / ATS as normal via report fields.
Battery capacity and other parameters are exposed to scripts as operating conditions, allowing scripts to adjust battery performance on a per-haul basis.