Scraper Conveyor Straightening With Rolling Time-Domain Control
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Solution Overview
Problem
Existing scraper conveyor straightening methods fail to account for dynamic changes in the coal seam floor during mining, leading to incomplete propelling processes and information lag, which complicates the adjustment of the scraper conveyor and hydraulic supports, resulting in inefficiencies and potential equipment damage.
Innovation Solution
A scraper conveyor straightening method based on a rolling time-domain control concept, utilizing a feedback control model, mining face information processing, coupled floor update, baseline prediction, spatial difference feedback, and control quantity optimization models to predict and adjust the scraper conveyor's position in real-time, considering coal seam floor dynamics and physical interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional straightening methods using effective propelling displacement are used, then the scraper conveyor can be straightened, but the method fails to account for dynamic changes in coal seam floor, leading to incomplete propelling processes and information lag
Solution Approach 1:
The patent implements dynamic straightening control by continuously updating the scraper conveyor's position and attitude based on real-time data from multiple sensors (GPS, inertial measurement units, strain gauges). The control system dynamically adjusts the propelling displacement of each hydraulic support according to the actual floor conditions and scraper conveyor state, rather than using fixed predetermined values. This dynamic adaptation resolves the contradiction between maintaining straightening accuracy and adapting to changing floor conditions.
Solution Approach 2:
The patent establishes a closed-loop feedback control system that continuously monitors the scraper conveyor's position, attitude, and the coal seam floor conditions through various sensors. The collected data is fed back to the control system, which calculates the deviation from the desired straight line and adjusts the propelling displacement of hydraulic supports accordingly. This feedback mechanism eliminates information lag and ensures the system adapts to dynamic floor changes while maintaining straightening accuracy.
2Manufacturing precision
If multiple sensors and controllers are deployed on each hydraulic support to achieve straightening, then straightening control can be implemented, but the system complexity increases significantly
Solution Approach 1:
The patent merges the control functions of multiple hydraulic supports into a centralized control system that coordinates their operations. Instead of each hydraulic support operating independently with its own control logic, the system integrates sensor data from all supports and calculates unified propelling displacement values that ensure the scraper conveyor moves along a straight line. This merging approach maintains straightening precision while reducing overall system complexity.
Solution Approach 2:
The patent implements a universal control algorithm that can be applied to different hydraulic support configurations and scraper conveyor setups. The control system uses a standardized method for calculating propelling displacement based on the scraper conveyor's current state and desired trajectory, making the system adaptable to various mining conditions without requiring complex customizations for each specific configuration.
3Ease of operation
If the scraper conveyor is straightened based on fixed propelling displacement values, then the control process is simple, but the method is inconsistent with actual propelling situations where floor changes occur
Solution Approach 1:
The patent performs preliminary assessment of the coal seam floor conditions and scraper conveyor state before each propelling operation. The control system calculates the required propelling displacement for each hydraulic support in advance, taking into account predicted floor changes and the scraper conveyor's current position and attitude. This preliminary action ensures that the control process remains relatively simple while maintaining reliability by pre-adjusting for expected variations in floor conditions.
Data Source
AI summary
This application provides a scraper conveyor straightening method based on a rolling time-domain control concept. The scraper conveyor straightening method includes an execution space, a deduction space, and a prediction space. The method includes: receiving, by the execution space, an optimal propelling strategy of a scraper conveyor finally determined by the prediction space; controlling, by an electro-hydraulic control system, a subsequent propelling operation on the scraper conveyor based on the optimal propelling strategy, so as to achieve a purpose of straightening the scraper conveyor; and at the same time, feeding back real-time mining face information to the deduction space; deducing, by the deduction space, the real-time mining face information, and sending the deduced information to the prediction space; and, receiving, by the prediction space, the deduced information of the deduction space, and performing simulated prediction to finally determine an optimal propelling strategy of the scraper conveyor.