Design of Potentiometer Brush of XU7 Engine and Detecting the Faulty Ones by Signal Processing

Propose of this paper are the determination of material and thickness of brush of potentiometer of XU7 engine and solving the defect of poor functioning. The contact force value of potentiometer is an important design parameter. Hence, the static analysis is performed at first for determination of the material and the thickness of the brush providing the desired force. Then an experimental method is used for verifying the results. Potentiometer functioning is investigated at dynamic mode using signal processing methods. Therefore, the output signal of some of the normal and defective potentiometers with different materials and under different working condition and cycles are recorded. A feature vector is defined for each signal. This feature vector has four elements that the first element is achieved using principle component analysis. The other elements are kurtosis, skewness and mean of the signal. Using these feature vectors and their classes, a classifier is developed for recognition of normal and defective components.