电液伺服阀动态相频特性CAT数据处理误差分析

ANALYSIS OF THE CAT DATA PROCESS ERROR FOR ELECTRO-HYDRAULIC SERVO VALVE DYNAMIC PHASE FREQUENCY CHARACTERISTICS

在计算机辅助测试(CAT)条件下,对电液伺服阀频率响应特性测试数据进行了离散化处理。该处理过程产生了电液伺服阀频率响应特性测试的数据处理误差,误差的大小与数据的离散化程度有关。通过深入分析数据的离散化程度与伺服阀动态相频特性测试误差的关系,指出提高伺服阀频率响应特性测试精度的方法,并用试验验证了理论分析的正确性。

Under the condition of CAT (Computer aided test), the test data about electro-hydraulic servo valve frequency response characteristic is processed with the discrete way. The disposal brings some errors to the test results. The magnitude of error is connected with the degree of discreteness. By analyzing the data's relation between the degree of discrete and the magnitude of error in detail, some methods how to increase the test precision of servo valve frequency response characteristic are given, and the theory analyses in this article are verified by the tests.