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首页> 美国政府科技报告 >Effect of Large-Scale Structures on the Stability of Coal-Face Steering
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Effect of Large-Scale Structures on the Stability of Coal-Face Steering

机译：大型结构对采煤工作面稳定性的影响

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Simplified models of piecewise rigid support structures for powerloaders operating on longwall coalfaces are shown to be analyzable by z-transform methods. Such analysis predicts that increasing the length of the structure's subsections sufficiently (compared to the inherent delay within the machine's vertical steering system) stabilizes the vertical steering of the entire coal face. Increasing the width of the structure to embrace more than two consecutive cut floors is shown to eliminate the need for electronic tilt-feedback in control systems. These analytical predictions are shown to hold good in detailed simulations of the system. An increase in the size of support-structure segments can potentially reduce the complexity of steering control systems. The size increase must be substantial (4 to 5 times the conventional size).

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