基于验证法的对某颤振实时系统故障测试研究

Research on Testing of Fault for a Real-Time Flutter System Based on Validation Approach

通过对系统实现原理剖析,在将故障隔离到元、器件级后又因故不能解决的背景下,提出了改变量程进行小电压信号测量的解决思路,但精确度能否满足实际应用成为问题的焦点;根据振动信号属性和误差合成、传递、分配原理确立了验证关系式,并围绕该关系式展开测试研究;分析了故障产生的深层原因以及零点附近出现粗大误差对实际应用的影响度;给出了具体验证分析方法和降低方法误差、示值误差处理措施;同时还给出了对引用的某些工程理论实际验证的具体结论,最后指出了存在的问题;实践表明,方法正确,验证成功,对实际工程应用具有一定的参考价值。

Through analysis for the system realization principles, this paper presents the solution, changing the measuring range, to make a measurement on small voltage signal for the issue that faults still can nut be ruled out on the device level. However, whether the de- gree of precision could satisfy the need in practical application will be the focus issue. According to vibration signal attributes and error syn- thesis, transmission and distribution principles, the relational expression of validation is established in this paper. Testing research is carried out based on the relational expression. Analysis of underlying causes of failure and influence of gross error near zero is given. This paper also provides the specific validation approach, the measures to reduce methodical error and indicating error, as well as some of the practical con- clusions from cited engineering theory. Finally, Remaining issues are discussed. The validation approach described in the paper is proved to be successful in practice and has some reference value for engineering applications.