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Particle impact noise detection (PIND) test is a reliability screening technique for hermetic components, which is prescribed by MIL-STD-883E. Shock process in PIND is very important to detect remainder and ensure the quality of components. Since the control of acceleration is more difficult, the closed-loop control of acceleration is simplified as the closed-loop control of velocity based on assumed conditions according to the characteristics of shock process. Through simulation and experiments, the dynamic model is established, the closed-loop control circuit of velocity for shock process is designed and the PID algorithm is realized in hardware circuit. The experiment results show the excellent performance of control circuit and the validity of assumed conditions.
Date of Conference: 17-20 Oct. 2008