液压泵和液压马达CAT等值曲线族生成方法

提出了一种利用矩形域最小二乘曲面拟合的方法与MATLAB软件结合生成液压泵和液压马达CAT技术中等值（等效率或等功率）曲线族的方法，此方法充分利用了MATLAB所具有的生成各类曲面和曲线的功能优势，使得工况点在试验域内允许无次序和无规划地任意采集，因此可以大大简便操作，避免换算误差，同时分析了所提出方法的误差，并通过实例证实了该方法的可行性和正确性。

Method of Drawing Isograms in Hydraulic Pump and Motor CAT

In this thesis,a method which uses the theory of rectangle region least square method and MATLAB language to draw Isograms in hydraulic pump and motor CAT technology.This method makes a good use of MATLAB language's ability of drawing curved surface and curved lines.In this method,the test point can be set randomly and the test data can be gained irregularly within test range,so the test procedure has been greatly simplified,and avoids inter calculating error.The article analyzes the error in use of this method and demonstrates the method's rightness and feasibility through one example.