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为提高精密机床主轴回转精度 ,并进一步为主轴系统动态特性的改善及其优化设计提供理论依据 ,提出了带节流器的静压轴承自控系统动态品质的分析方法。通过对主轴力平衡条件和液体流量连续性方程的分析 ,推导出系统的非线性微分方程组 ,经 Taylor和 L aplace变换后 ,建立了系统的数学模型。通过对其传递函数的描述和动特性计算 ,得出了在外载荷变化情况下系统的过渡过程曲线和对数相频、幅频特性图像 (Bode图 )。利用自控系统稳定性理论对计算结果进行了综合分析 ,评定了静压轴承自控系统的动态品质
In order to improve the precision of the spindle of the precision machine tool and to provide the theoretical basis for the improvement of the dynamic characteristics of the spindle system and its optimal design, a dynamic quality analysis method of the hydrostatic bearing automatic control system with throttle is proposed. By analyzing the equations of spindle force balance and liquid flow continuity, the system of nonlinear differential equations is derived. After Taylor and L aplace transformation, a mathematical model of the system is established. Through the description of the transfer function and the calculation of the dynamic characteristics, the transition curve and the logarithmic phase-frequency and amplitude-frequency characteristic images (Bode plot) of the system under the change of the external load are obtained. Based on the stability theory of automatic control system, the calculation results are comprehensively analyzed, and the dynamic quality of hydrostatic bearing automatic control system