Our PhD Students

My PhD research is about contact reliability evaluation and optimization design method of switch apparatus, such as relays and contactors. Switch apparatus are widely used in various applications of defense weapons and circuit switching systems to complete signal transmission, control and system power distribution. The reliability of the switch apparatus directly affects the normal use of equipment and is an important guarantee for the safe operation of the entire defense weapon and power system. Therefore, long lifetime and high reliability of switch apparatus, which are used in the high-end equipment manufacturing industry, are always expressly required. The continuous switching process of switch apparatus will cause contact wear, high contact resistance and electrical erosion, which is closely related to the electrical characteristics of the contact bounce during the switching of the appliances. The mechanical movement of the structure will cause contacts collide with each other during the closing process and produce the bounce arc. This can aggravate the corrosion of the contacts, which in turn reduces the electrical life and reliability of the contacts greatly. In recent years, more and more scholars have improved the structure of the electrical appliances through numerical simulation to enhance their contact characteristics. However, this method is very time-consuming and cannot accurately reflect the contact mode and bounce mechanism of the contacts, which limits the evaluation of the contact characteristics for complex switch apparatus. Regarding the modeling research on the reliability of switch apparatus, scholars mainly use stochastic process modeling method to simulate contact faults, which is lack of modeling and analysis of bounce problems caused by uncertainties. Therefore, the bounce model, contact reliability evaluation and experimental research methods are of great significance to the optimal design of switch apparatus. In addition, constructing a multi-field model of process parameters to obtain the dynamic characteristics of the switch apparatus and using it as an important source of information for subsequent reliability evaluation and bounce suppression.