1. Plural of amplidyne; rotating electrical machines that amplify small electrical signals into larger ones, used in control systems and servo mechanisms.
Usage: technical; electrical engineering; largely historical; superseded by modern electronic amplifiers

Examples

• Amplidynes were widely used in aircraft control systems during the mid-20th century.
• The servo system relied on amplidynes to convert weak pilot inputs into powerful control signals.
• Modern electronic amplifiers have largely replaced amplidynes in contemporary applications.
• Engineers designed the feedback loop using amplidynes to achieve precise motor control.