Abstract: In order to realize the vertical static-dynamic combined accurate loading of anomalously low friction rockburst test platform, an electro-hydraulic servo system based on force control is designed. Firstly, based on the mathematical model of the system, the influence of static loading on dynamic loading system is studied. Then, this paper uses AMESim software to study the influence of maximum no-load flow rate of servo valve and the open-loop gain on system performance. Finally, an anomalously low friction rockburst test platform is established to carry out static-dynamic combined loading test. The results show that the higher the maximum no-load flow rate is, the greater the system bandwidth is, and the greater the system energy loss is, and the open-loop gain of the system is reasonably selected according to the performance index. The electro-hydraulic servo static and dynamic combined loading system can realize static-dynamic combined loading with static load of 0~500 kN, dynamic load amplitude of 0~50 kN and frequency of 0~25 Hz.

Key words: Anomalously low friction rockburst, static and dynamic combined loading, simulation analysis, experimental study

摘要： 为了实现超低摩擦型冲击地压试验台竖向静动复合精确加载，设计了一种基于力控制方式的电液伺服系统。首先，基于系统的数学模型研究静载加载对动载加载系统的影响；然后，通过AMESim软件就伺服阀最大空载流量和开环增益对系统性能的影响规律进行研究；最后，搭建超低摩擦型冲击地压试验台进行静动复合加载试验。结果表明，伺服阀最大空载流量越高，系统频宽越大，能量损耗增加，根据性能指标合理选择系统开环增益,电液伺服静动复合加载系统可实现静载0~500 kN，动载幅值0~50 kN、频率0~25 Hz的静动复合加载。

关键词: 超低摩擦型冲击地压, 静动复合加载, 仿真分析, 试验研究