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CN110134110A 基于区间控制策略的转子裂纹故障检测方法 无效 - 撤回

基于区间控制策略的转子裂纹故障检测方法
摘要：
本发明提供基于区间控制策略的转子裂纹故障检测方法，属于航空发动机技术领域。本发明首先选取航空发动机双转子结构的低压部分建立单转子系统模型，并建立坐标系；然后计算航空发动机转子系统临界转速，并根据临界转速设置转速的目标控制区间；在待检测处的Y轴方向、转速的目标控制区间内施加常数激励，建立转子系统动力学模型；将所述转子系统动力学模型转换为振动响应方程；将各个参数作为转子系统的输入信号，将振动响应作为转子系统的输出信号，绘制幅频响应曲线；最后根据幅频响应曲线判断转子裂纹故障。本发明解决了现有转子裂纹故障检测的成功率不高的问题。本发明可用于航空发动机转子裂纹检测。
摘要（英）：

The invention provides a rotor crack fault detection method based on an interval control strategy, belonging to the technical field of aeroengines. The method provided by the invention comprises the following steps: firstly, selecting a low pressure part of an aeroengine bi-rotor structure to build a single rotor system model, and building a coordinate system; then, calculating critical speed of revolution of an aeroengine rotor system, and setting a target control interval of the speed of revolution according to the critical speed of revolution; applying constant excitation in the target control interval of the speed of resolution in a Y axis direction of a to-be-detected part, and establishing a rotor system dynamical model; converting the rotor system dynamical model into a vibration response equation; taking each parameter as an input signal of the rotor system, taking vibration response as an output signal of the rotor system, and drawing an amplitude-frequency response curve; andfinally, judging the rotor crack fault according to the amplitude-frequency response curve. The method provided by the invention solves a problem that success rate of the existing rotor crack fault detection is not high, and the method can be used for detection of aeroengine rotor crack.

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