Abstract In order to guarantee stability during luffing process of a folding-boom arm system, output of the system should be precisely controlled based on analysis of key factors affecting luffing stability. Luffing motion was simulated focusing on jittering of the working point at beginning and end moment. Simulation results indicate that luffing stability is mainly determined by the action synchronization of hydraulic cylinders which drive the middle arm. An optimal control strategy was proposed through parameter adjusting. The field test results have shown the luffing stability is improved. Meanwhile, the requirement on executive precision of hydraulic cylinders has also been greatly reduced.

中文翻译：

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折臂臂系统变幅稳定性分析与优化

摘要 为了保证折叠臂系统在变幅过程中的稳定性，应在分析影响变幅稳定性的关键因素的基础上，精确控制系统的输出。模拟变幅运动，重点是开始和结束时刻工作点的抖动。仿真结果表明，变幅稳定性主要由驱动中臂的液压缸的动作同步决定。通过参数调整提出了最优控制策略。现场试验结果表明，变幅稳定性得到改善。同时，对液压缸执行精度的要求也大大降低。