气动舵机通用测试平台的设计及实现

Design and Implementation of General Test Platform for Pneumatic Actuator

为实现航空飞行器气动舵机性能测试,研制一套可用于多型航空飞行器气动舵机性能测试的通用自动测试平台;测试平台采用了电机、扭簧两种形式的加载装置作为加载台,通过舵机与摇臂之间对应运动关系计算所需的几何数据,推导出加载台推杆机构传动方式;在软件上采用了LABVIEW软件进行编程,实现了线性度、灵敏度、滞环特性、频率特性等气动舵机性能测试,同时针对在频率特性检测上的难点做了理论分析,提出单个正弦波扫频测量的解决方法;为提高测试平台测试精度,对测量舵机的频率特性做误差分析,提出了测试结果中减去与采样点N相应的固定值方法;理论计算与实际测试验证测试平台幅频特性的数据处理误差最大为0.007 dB,相角处理误差最大为0.607°,有效提高了测试平台的测试精度。

In order to test the performance of pneumatic rudder of aircraft, a universal automatic test platform for the performance test on pneumatic rudder of multi-type aircraft is developed. The test platform adopts the loading equipment of motor or torsion spring as the loading platform, according to the required geometric data for calculating the corresponding motion relationship between the rudder and the rocker arm, the driving mode of the push rod mechanism of the loading platform is derived. In the software, LABVIEW is used to implement the programming, and the performance test of the pneumatic actuator, such as linearity, sensitivity, hysteresis characteristics, frequency characteristics and so on, is realized, a single sine wave sweep frequency measurement method is proposed. In order to improve the test precision of the platform, the frequency characteristic error of the sampling point N from the test result is put forward. The maximum error of amplitude-frequency data is 0.007 dB, and the maximum error of phase angle by 0.607°, which improves the test precision of the platform.