2021 Volume 18 Issue 20 Pages 20210344
Solenoid valves (SVs) as a kernel component are widely used in various control systems. Through accurately predicting the remaining useful life (RUL) of the SV, predictable maintenance its can be implemented to reduce system maintenance costs and system reliability improves. This paper proposes a frequency modulated continuous wave (FMCW) based on millimeter-wave radar and the auxiliary particle filter (APF) technique to estimate the RUL of SVs. Firstly, a 77GHz FMCW millimeter-wave radar with a single input and multiple outputs (SIMO) is used to obtain the core displacements of two SVs with the same frequencies. A degradation experiment is designed, and the distortion degree of the core displacement is taken as the degradation indicator to construct a degradation data set. Secondly, the APF technique is used to estimate the degradation state and RUL of the SV. Finally, an experiment platform is built using TI’s millimeter-wave radar to verify the method proposed in this paper. The experimental results show that the RUL estimation results are satisfactory.
