Structural synthesis of self-sustaining vibro-impact systems
In §12 we have already analysed systems in which the action of a force on a striker appears as a function of its phase coordinates only. Similar methods of realising periodic motion have been widely used in percussion machines which use electrical, pneumatic or hydraulic methods of exciting vibration. Such machines include pneumatic chisels and perforators, hydraulic or pneumatic rotary impact drills, and various types of test machines or test rigs. Applying self-sustaining vibration gives stability to the process compared to the application of forced vibration and often leads to a more simple form of design.
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