Spindle rotation accuracy is important in machining process. Indirect compensation of spindle rotation error has been widely adopted in the field of machining accuracy improvement. However, there are some limitations on indirect compensation, and a little research on direct compensation can be found. This article utilizes active lubrication technology to improve the spindle rotation accuracy. Hydrostatic journal bearing with control recesses and servo valve drove by piezoelectric ceramics are adopted to compose the compensation element. The simple control strategy PID is adopted to provide control signal for servo valve. Both simulation and experiment are designed and conducted. The results show that proposed bearing system has the ability to improve the spindle rotation accuracy.

主轴旋转精度在加工过程中很重要。主轴旋转误差的间接补偿在加工精度提高领域得到了广泛的应用。但是，间接补偿也有一定的局限性，对直接补偿的研究还很少。本文采用主动润滑技术提高主轴旋转精度。补偿元件采用带控制凹槽的静压轴颈轴承和压电陶瓷驱动的伺服阀。采用简单的控制策略PID为伺服阀提供控制信号。设计和进行了仿真和实验。结果表明，所提出的轴承系统具有提高主轴旋转精度的能力。