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中文摘要：
针对某矿用自卸车多级缸举升换级时的冲击振动问题，研究了举升过程中的参数关系；根据举升系统电液比例控制方案提出了负载敏感举升系统分段控制方法，对举升缸换级时的模糊控制算法进行分析。仿真分析表明，分段控制较单一的电液比例控制能有效改善多级缸换级时的冲击问题。现场试验证明，该举升系统有效解决了变负载和参数时变系统的控制稳定性问题。研究结果为分析同类问题提供借鉴与参考。
英文摘要：
Aimed at the lifting tipper impact problems of changing stage of multistage cylinder in mining dump truck, the parameter relationship was studied in the lifting process. A subsection control scheme of load sensitive lifting system was proposed based on electric-hydraulic proportional control. The fuzzy control algorithm was analyzed during changing stage of the cylinder. Simulation analysis shows that the subsection control can improve changing stage impact problem of the multistage cylinder compared with electric-hydraulic proportional control. Through the field test, it is proved that the lifting system solves the control stability of the variable load and parameter time-varying systems effectively,providing reference to analyze the same problem.
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