本研究工作针对液压凿岩机,利用键图方法进行了系统的动态仿真,直接得到供计算一机使用的二次仿真模型。活塞前后腔的压力大小由油液的容性计算来确定,系统状态转换通过调用一个过切换口的流计算子程序来连接。整个系统建模快,仿真程序设置简单,状态转换连接方便,样机试验与上机仿真的结果对照表明,其精度也较高。 In this work, aiming at the hydraulic rock drill, the dynamic simulation of the system is done by using the key map method, and the secondary simulation model for calculating a machine is obtained directly. The pressure in the front and back chambers of the piston is determined by the fluid capacity calculation. The system state transition is connected by calling a flow calculation subroutine over the switch port. The whole system modeling is fast, the simulation program is easy to set up, and the state transition connection is convenient. The comparison between the prototype test and the simulation results shows that the precision is also high.