基于自主诊断重构技术的航天器故障检测系统设计

Design of Spacecraft Fault Detection System Based on Autonomous Diagnosis and Reconstruction Technology

传统航天器故障检测系统姿态定位能力较差,导致不能突破阈值,准确实现检测,且传统系统不具备重构能力;为解决上述问题,基于自主诊断重构技术,提出了一种故障检测的新方法,优化设计了航天器故障检测系统的硬件和软件部分,硬件设计采用EEC-I型检测器,为保证检测器的运行,对检测器的电压与电流范围进行了设置;设计采用MATLAB的数据采集器,选用Telnet接入端口,实现采集器的通信,确保数据的顺利采集;采用FIR滤波器,为保证信号的完整性对通带和阻带进行设置;设计采用4NIC-UPS27型号一体化不间断电源为航天器故障检测系统提供动能;软件设计基于自主诊断重构技术的航天器故障检测系统流程,运用小波网络算法对航天器的姿态角数据进行分析,预测航天器的姿态角的安全阈值,最后利用残差数据分布概率模型进行航天器故障诊断;实验结果表明,设计的基于自主诊断重构技术的航天器故障检测系统能够很好地从X、Y、Z三个轴进行检测,确定不同方位的航天器故障,在设定阈值后,提出的检测系统能够很好地分析阈值,实现残差突破,同时具备路线重构能力。

The traditional spacecraft fault detection system has poor attitude positioning ability,which makes it impossible to break through the threshold and accurately realize the detection,and the traditional system does not have the ability to reconstruct.In order to solve the above problems,based on the self-diagnosis and reconstruction technology,a new method of fault detection is proposed to design hardware and software of the spacecraft fault detection system.Design EEC-I detector to set the voltage and current range of the detector;MATLAB data collector and Telnet access port to ensure data acquisition;FIR filter to set passbelt and resistance band to ensure the signal integrity and 4NIC-UPS27 integrated uninterrupted power supply to provide kinetic energy for the spacecraft fault detection system.The software designs the spacecraft fault detection system based on independent diagnosis and reconstruction technology,uses the wavelet network algorithm to analyze the attitude angle data,predict the safety threshold of the spacecraft,and finally uses the residual data distribution probability model.The experimental results show that the designed spacecraft fault detection system based on the self-diagnostic reconstruction technology can detect from the three axes of X,Y,and Z to determine the spacecraft faults in different azimuths.After setting the threshold,the proposed the detection system can analyze the threshold well,realize the breakthrough of the residual error,and has the ability of route reconstruction.