INVESTIGATING CAUSES OF ANGLE SENSOR FAILURES IN SUSTAINER ENGINES OF LAUNCH-VEHICLES

Tsygankov Aleksey Igorevich, Postgraduate student, Penza State University (40 Krasnaya street, Penza, Russia), cygankv-aleksejj@rambler.ru

629.7.05

Background. The research object is angle sensors sustainer engines of lanchvehicles. The aim of the work is to determine the cause of sensor failures during periodic testing.
Materials and methods. The study was conducted by scanning electron microscopy and X-ray microanalysis that allowed to analyze the microstructure of a contact pairs of a sensor and to determine the chemical composition of wear debris.
Results. The author obtained data on sensor’s contact pair wear, caused by appearance of abrasive particles on the working contact surface. Based on the data the researcher made practical recommendations to prevent failures of the sensor, caused by excessive wear and tear of its resistive element.
Conclusions. The study identified the causes of failures of sensors due to increased wear of resistive elements, caused ingress of abrasive particles on the working contact surface.

potentiometer, resistive element, movable contact, contact pair, wear, wear products.

1. Belevtsev A. T. Potentsiometry [Potentiometers]. Moscow: Mashinostroenie, 1968, 328 p.
2. Nedorezov V. G., Tsygankov A. I. Nadezhnost' i kachestvo: tr. Mezhdunar. simpoziuma [Reliability and quality: proceedings of the International symposium]. Penza: Izd-vo PGU, 2014, vol. 2, S.
3. Kuznetsov E. A. Aviatsionnaya promyshlennost' [Aircraft industry]. 1965, no. 2.
4. Kragel'skiy I. V. Trenie i iznos [Friction and wear]. Moscow: Mashgiz. 1962, 384 p.