Abstract
To improve reliability of microswitches, it is necessary to carry out theoretical studies of the switching process both at the moment of switching and at the moment of bouncing. The article presents a dynamic model of microswitches with elastic rod elements, which allows at the design stage to evaluate such basic performance characteristics as response time and contact bounce time. The proposed technique is based on representation of the solution to the differential equation of vibrations of an elastic element in the form of a linear combination of eigenforms and the application of the Bubnov-Galerkin method. Theoretical studies of bounce in a rod microswitch are carried out. It is shown that breakdown precursors of the spacer spring are an increase in the switching time and the time of the first separation in case of bouncing.
Highlights
Failures in low-level contacts of rod-type microswitches mainly appear due to breakage of an elastic element or a spacer spring, sticking of a moving contact, contact bounce during switching, a sudden change in the contact pressing force, contamination of contact surfaces, etc
To increase reliability of microswitches, it is necessary at the design stage to carry out theoretical studies of the response time, taking into account contact bounce
To create reliable miniature switches, it is necessary to develop mathematical models that take into account contact bounce during switching, and use them to identify the main causes and precursors of failures and breakdowns at the design stage
Summary
Failures in low-level contacts of rod-type microswitches mainly appear due to breakage of an elastic element or a spacer spring, sticking of a moving contact, contact bounce during switching, a sudden change in the contact pressing force, contamination of contact surfaces, etc. To increase reliability of microswitches, it is necessary at the design stage to carry out theoretical studies of the response time, taking into account contact bounce. To create reliable miniature switches, it is necessary to develop mathematical models that take into account contact bounce during switching, and use them to identify the main causes and precursors of failures and breakdowns at the design stage
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