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Нагрузки на двигатель
Tools/Инструменты > Project Settings/Настройки проекта > Travel Time/Время в пути > Engine Loads
Average engine loads for idle, spotting, dumping and trolley assisted operation can be measured from the haul truck’s on-board management systems (such as VIMS, KOMTRAX, etc).
Acceleration
Tools > Project Settings > Travel Time > Acceleration
Acceleration limits are measured in “kilometres per hour per second”. The defaults are set to a conservative standard and should be updated from field observations.
To measure the acceleration and deceleration of a truck, hop in the cab for a number of cycles and measure both loaded and unloaded:
- Seconds of hard braking from 10km/h to stationary,
- Seconds of hard acceleration from stationary to 10km/h.
Then the maximum acceleration/braking will be the change in speed (10 km/h) divided by the time (measured in seconds).
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/Нагрузки на двигатель
Средние значения нагрузок на двигатель во время простоя, ожидания, выгрузки и работы с троллейным электроприводом могут быть вычислены из бортовых систем управления карьерным самосвалом (например, VIMS, KOMTRAX и пр.).
Ускорение
Tools/Инструменты > Project Settings/Настройки проекта > Travel Time/Время в пути > Acceleration/Ускорение
Пределы ускорения измеряются в «километры в час в секунду». Значения по умолчанию устанавливаются с заниженным стандартом, их следует обновить в соответствии с фактическими наблюдениями в процессе эксплуатации.
Для измерения ускорения и замедления самосвала пронаблюдайте за его работой с грузом и без в течение нескольких циклов, обращая внимание на:
- время (секунды) резкого торможения с 10 км/ч до останова,
- время (секунды) резкого ускорения из состояния останова до 10 км/ч.
Далее, значение максимального ускорения/замедления следует заменить на результат деления скорости (10 км/ч) на время (измеренное в секундах).
При измерении пределов торможения, узнайте у операторов оптимальные методы сокращения просыпания груза и эксплуатации дорог.
Traction
Tools > Project Settings > Travel Time > Traction
The coefficient of traction is the maximum percentage of the normal component of the truck's weight on the driven axle(s) which can be used to accelerate or decelerate the truck. Braking reliance on traction applies another coefficient, which specifies how close the truck driver will approach skidding when decelerating. More traction means that a truck can use faster acceleration and braking without skidding. If traction is so low that a truck would spin its wheels on the ramp, then Haul Infinity will report a “steep segment” error.
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Adjust the coefficient of traction to match the conditions on your site.
Retarder
Tools > Project Settings > Travel Time > Retarder
Applying brakes with too much force can cause premature brake failure, reduce tyre life expectancy, increase road maintenance costs and/or cause strut damage from digging potholes in the road surface. The default max use of retarder is set to 70% as a conservative estimate of safe operating behaviour. Consider your truck types and maximum ramp gradients when setting the max use of retarder.
Rolling Resistance
Tools > Project Settings > General > Network Defaults
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Typical rolling resistance factors (Caterpillar Performance Handbook, 2013)
TKPH Constants
Refer to the TKPH rating tables provided by your tyre manufacturer.
Trolley Assist Curves
Rimpull is the total linear force that a vehicle can exert on the ground. Also called “tractive effort,” it is the axle torque divided by the distance from the axle to the road surface.
Power (N*m/s) = Rimpull (N) * Velocity (m/s)
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Take careful note to use the right units if doing conversions. Haul Infinity uses kilograms of force (kgF) as the default unit of rimpull measurement.
Fuel Curves
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Кривые расхода топлива
Кривые расхода топлива карьерного самосвала берутся из справочников производителя. Их требуется обновить в программе на основе измерений с бортовых систем техники.
Single Lanes
Haul Infinity 3.4 does not support traffic simulations. Truck fleet allocation is calculated on the assumption of a continuous flow of traffic between the source and destination.
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For full mine site traffic simulation, Alastri recommends running Simio in conjunction with Haul Infinity. Visit www.simio.com for more information about discrete event simulation.
Time and Motion Studies
Haul Infinity cycle times can be calibrated with time and motion studies in the field.
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