Effect of the Method for Treatment of the Functional Surface of a Piezoelectric Vibration Sensor on its Sensitivity

The investigation has been performed for the possibilities to improve the operating characteristics of aviation vibration sensors without increasing the cost price of their manufacture due to optimization of the microgeometry of functional surfaces. The goal of investigation is to develop a set of procedures for modernisation of the process of manufacture of parts for the vibration sensor providing the optimum microgeometry of their functional surfaces. The investigation has been carried out with the use of computer simulation method and experimentally. The microgeometry of functional surfaces has been described by means of graphical criteria. The Taguchi method has been used for planning full-scale experiments on machining of functional surfaces. The computer model of the vibration sensor design has been developed allowing to evaluate the effect of deviation of the relative position of functional surfaces of the sensor on its functional characteristics, the experimental and design data have been compared. As a result of investigation, the relationship between process factors and sensitivity of the vibration sensor has been identified and described, the optimum process parameters of treatment at manufacturing the functional surface, which provide its best sensitivity, have been determined.