本文针对某矿掘锚一体机掘进过程中出现整机后退问题进行了分析,并根据问题的分析提出掘锚一体机防退机对策。依据现场退机现象,进行设备故障排查,理论计算分析退机现象,提出掘锚一体机防退机对策,主要对策有:采用“顶天立地”支撑结构...本文针对某矿掘锚一体机掘进过程中出现整机后退问题进行了分析,并根据问题的分析提出掘锚一体机防退机对策。依据现场退机现象,进行设备故障排查,理论计算分析退机现象,提出掘锚一体机防退机对策,主要对策有:采用“顶天立地”支撑结构、加大护盾支撑压力度、护盾顶板增加防滑齿、匹配掏槽速度和切割速度等。This paper analyzes the problem of whole machine backing up in the course of driving and anchoring integrated machine in a mine, and puts forward the countermeasure of preventing the machine backing up. According to the phenomenon of machine withdrawal on the spot, the equipment failure is checked, the phenomenon of machine withdrawal is calculated and analyzed in theory, and the countermeasures for preventing machine withdrawal of the driving and anchoring integrated machine are put forward, the main countermeasures include adopting “Not Scared to Die” supporting structure, increasing shield support pressure, increasing anti-skid teeth on shield roof, matching cutting speed and cutting speed.展开更多
In this work, we investigate the stabilization control design of nonholonomic stochastic system in strict-feedback form. Under the condition of all states being available for feedback, a state feedback controller was ...In this work, we investigate the stabilization control design of nonholonomic stochastic system in strict-feedback form. Under the condition of all states being available for feedback, a state feedback controller was developed via the stochastic Lyapunov-like theorem and backstepping design technique. The controllers guarantee all states of the closed-loop system are bounded in probability, and largely asymptotically stable when the stochastic disturbances equal to zero at the equilibrium point of the open-loop system. Besides, the time-varying technique was introduced to avoid the uncontrollable state of chained system.展开更多
文摘本文针对某矿掘锚一体机掘进过程中出现整机后退问题进行了分析,并根据问题的分析提出掘锚一体机防退机对策。依据现场退机现象,进行设备故障排查,理论计算分析退机现象,提出掘锚一体机防退机对策,主要对策有:采用“顶天立地”支撑结构、加大护盾支撑压力度、护盾顶板增加防滑齿、匹配掏槽速度和切割速度等。This paper analyzes the problem of whole machine backing up in the course of driving and anchoring integrated machine in a mine, and puts forward the countermeasure of preventing the machine backing up. According to the phenomenon of machine withdrawal on the spot, the equipment failure is checked, the phenomenon of machine withdrawal is calculated and analyzed in theory, and the countermeasures for preventing machine withdrawal of the driving and anchoring integrated machine are put forward, the main countermeasures include adopting “Not Scared to Die” supporting structure, increasing shield support pressure, increasing anti-skid teeth on shield roof, matching cutting speed and cutting speed.
基金Project supported by the National Natural Science Foundation ofChina (No. 60474010) and the Research Fund for the Doctoral Pro-gram of Higher Education, China
文摘In this work, we investigate the stabilization control design of nonholonomic stochastic system in strict-feedback form. Under the condition of all states being available for feedback, a state feedback controller was developed via the stochastic Lyapunov-like theorem and backstepping design technique. The controllers guarantee all states of the closed-loop system are bounded in probability, and largely asymptotically stable when the stochastic disturbances equal to zero at the equilibrium point of the open-loop system. Besides, the time-varying technique was introduced to avoid the uncontrollable state of chained system.
