第4章主要解决了齿面的参数化和微分几何结构分析问题，它是实现三阶接触分析理论的基础。
Chapter 4 mainly solved the problems of tooth flank parameterization and the analysis of differential geometric structure, which is the theoretical basis to implement the third order contact analysis.
这种方法极大地简化了分析和演算，并为应用微分几何控制方法打下了必要的基础。
The approach largely simplifies the system analysis, and build a necessary basis for the application of differential geometric methods.
在此基础上，利用微分几何的输入输出线性化方法，导出了一个简化的线性规范型子系统。
The problem of adaptive fuzzy sliding mode control for a class of nonlinear SISO systems with nonlinear input is studied in this paper.
在此基础上，利用微分几何的输入输出线性化方法，导出了一个简化的线性规范型子系统。
The problem of adaptive fuzzy sliding mode control for a class of nonlinear SISO systems with nonlinear input is studied in this paper.
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