Mining Machine Control System for Oil Sand Resistance Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mining machines traveling in oil sand mines face significant road surface resistance and rugged terrain, leading to lower actual traveling speeds and potential stalling, which reduces productivity due to the large road surface resistance and unevenness.
Innovation Solution
A mining machine control system that calculates a correction acceleration command value by adding an acceleration command value and a correction value, based on the first driving force component to maintain target speed and a second driving force component to offset resistance, ensuring the mining machine travels at the intended speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the mining machine travels on oil sand road surface with large road surface resistance, then the mining machine can operate in the mine, but the actual traveling speed becomes significantly lower than the target traveling speed
Solution Approach 1:
The control system calculates and applies correction values to the acceleration command in advance based on detected traveling state deviations, before the speed error becomes significant. This preliminary correction prevents the mining machine from stalling or falling behind the target speed, especially when encountering high resistance from oil sand road surfaces.
Solution Approach 2:
The control system continuously detects the actual traveling speed and compares it with the target traveling speed, then calculates correction values based on the detected deviation. This closed-loop feedback mechanism dynamically adjusts the acceleration command to compensate for road surface resistance and maintain the target speed.
2Ease of operation
If the mining machine travels on rugged road surface with unevenness, then the mining machine can navigate the terrain, but the mining machine may stack (stop) on the road surface
Solution Approach 1:
The control system applies correction values to the acceleration command in advance based on detected deviations, preventing the mining machine from stopping due to rugged terrain before it actually stops. This proactive correction maintains traveling continuity despite road unevenness.
Solution Approach 2:
The system continuously monitors traveling state and calculates corrections based on detected deviations caused by rugged terrain, dynamically adjusting the acceleration command to prevent stalling and maintain reliable continuous operation.
3Object-affected harmful factors
If the mining machine stacks on the road surface of oil sand, then the mining machine can overcome extreme resistance, but a lot of time is required to escape from the state and return to normal traveling
Solution Approach 1:
The control system prevents the mining machine from entering a stacked state by applying correction values in advance based on detected traveling state deviations. By maintaining appropriate acceleration before complete stalling occurs, the system avoids the time-consuming escape process entirely.
Solution Approach 2:
The continuous feedback mechanism detects deviations caused by high resistance and calculates corrections to maintain motion, preventing complete stalling. This reduces or eliminates the time required to escape from stacked states by keeping the mining machine in a controllable traveling state.
4Productivity
If the target traveling speed is set for the mining machine, then the mining machine can maintain productivity, but it may be difficult to travel according to the target traveling speed due to large road surface resistance
Solution Approach 1:
The control system continuously compares actual speed with target speed and calculates correction values based on the detected deviation. This feedback mechanism ensures the mining machine maintains the target traveling speed despite high road surface resistance, thereby preserving productivity.
Solution Approach 2:
The system dynamically changes the acceleration command parameter by adding correction values based on detected traveling state deviations. This parameter adjustment allows the mining machine to overcome resistance and maintain the target speed required for productivity.
Data Source
AI summary
A control system of a mining machine controls a driving device that drives a traveling device of the mining machine. The control system includes an acceleration command value calculation unit that calculates an acceleration command value for accelerating the mining machine, a correction value calculation unit that calculates a correction value for the acceleration command value based on a first driving force component of the driving device to cause the mining machine to travel at a target traveling speed and a second driving force component of the driving device to offset a resistance component against traveling of the mining machine, an addition processing unit that calculates a correction acceleration command value by adding the acceleration command value and the correction value, and an acceleration command value output unit that outputs the correction acceleration command value to the driving device.