介绍了双导向静压支承镗杆轴心漂移的在线检测与补偿系统。在该系统中，通过最优调节压电陶瓷节流器的节流缝隙来改变静压轴承的油腔压力，以抵消外载荷干扰的影响，抑制镗杆的轴心漂移，进而提高被加工工件（如气缸曲轴孔、发动机箱体）的同轴度。实验结果表明，采用这种控制方法，补偿效率可达５０％以上。 The on-line detection and compensation system of axial drift of double guided hydrostatic bearing boring bar is introduced. In this system, the pressure of the hydrostatic bearing oil chamber is changed by optimally adjusting the throttle gap of the piezoelectric ceramic restrictor to counteract the influence of external load disturbance and suppress the axial drift of the boring bar, so as to improve the work piece (Such as cylinder crankshaft hole, the engine box) coaxiality. Experimental results show that using this control method, the compensation efficiency can reach more than 50%.