中文摘要：

针对往复式钻井液压力信号发生器存在先导阀进液口流通面积小及流量供应能力不足导致的信号频率较低问题，提出了往复增流式井下压力信号发生器模型。根据其不同工作阶段，建立了相应的状态方程；应用MATLAB工具软件对其特性进行了实例仿真计算。计算结果表明：在相同参数情况下，增流阀信号发生器的脉冲上升时间大约为0.035 s，而原信号发生器脉冲上升时间约为0.154 s，即增流式压力信号发生器的信号频率可提高4倍。研究结果对于进一步研发井下信息高速率传输的信号发生器具有重要的指导意义。

英文摘要：

In order to solve the lower signal frequency of reciprocating drilling fluid pressure signal generator arising from small flow area of pilot valve inlet and insufficient flow supply capacity, a model of downhole pressure signal generator with reciprocating fluid increasing valve is proposed. A corresponding state equation is established for the specific working stage; and a case simulating calculation is conducted for its characteristics analysis by means of MATLAB tool software. Calculation results show that the pulse rise time is about 0.035 s for flow increasing valve signal generator and 0.154 s for original signal generator under the same parameters, that is, pressure signal generator with reciprocating fluid increasing valve can raise the signal frequency by four times. The results have important guiding significance on further development of signal generator for high-rate transmission of downhole information.