液体动静压电主轴磁-流-固全状态时效载荷识别理论与方法

液体动静压电主轴是精密机床的核心功能部件，磁-流-固全状态时效载荷对其回转精度具有决定性影响。电主轴运行过程中存在转速、油膜参数、磁场参数及形状误差等多源不确定性因素，响应信号耦合关系复杂，载荷难以直接计算和测量。本项目拟综合考虑液体动静压电主轴磁-流-固全状态时效载荷的不确定性、多场耦合性，研究和开发多场耦合不确定性载荷识别的计算反求技术。首先研究电主轴磁-流-固耦合机理，分析载荷和响应特征，基于盲源分离解耦策略实现耦合信号分离；其次对不确定性参数用概率和区间混合度量，实现不确定性参数更为准确的定量描述；再开发高效的多场耦合不确定性载荷识别算法，解决载荷识别过程中复杂的两层嵌套、不适定性等技术难点；最后将相关模型和算法模块化集成，实现液体动静压电主轴磁-流-固全状态时效载荷的概率区间的快速识别。本项目的完成能够为电主轴提供更为合理的载荷统计特性的边界，为机床的超精密加工提供理论支持。

The Hydrostatic-dynamic spindle is the core functional part of the precision machine tool, whose full-state aging of magnetic-fluid-solid load has a decisive influence on rotational accuracy. In the process of operation, the magnetic-fluid-solid load of motorized spindle is affected by complex coupling test signal and multi-uncertainty factors contain spindle speed, oil film parameters, magnetic field parameter and profile error. Measurement and mathematical calculation of the dynamic load are sometimes difficult. In this project, technical difficulties of the uncertainties and multi-field couplings from the full-state aging of magnetic-fluid-solid load of the Hydrostatic-dynamic spindle will be comprehensively considered, and the theory and methodology of inverse problems for uncertain multi-domain coupling load will be investigated and developed. Firstly, blind source separation which can separate source signals from complex signals will be researched based on load and response characteristics from the magnetic-flow-solid coupling mechanism; Secondly, the hybrid model of uncertainty will be established based on probability and interval, which can realize more accurate quantitative description about the uncertain parameters; Then the high efficient algorithm for the uncertain multi-domain coupling load identification will be developed, which can solve the complicated two layers nested and ill-posedness of the inverse problem in the load identification; Finally, the corresponding models and algorithms is integrated, and realize the speedily solving for the statistic interval of the full-state aging of magnetic-fluid-solid load acting on the Hydrostatic-dynamic Spindle. The completion of this project can provide more compelling statistical boundaries of the dynamic load of the motorized spindle, and provide theoretical support for the ultra-precision machine tool.