earticle

영어

There has been much research on the reliability and durability of the product life cycle using accelerated life test(ALT), accelerated stress test(AST) and accelerated stress audit(ASA) in the industry. Most of these systems use vibration induced by acceleration and deceleration. The device used for these kinds of research should have wide-band exciting frequency ranges to find the weak mode of the product. In this paper, platform of ALT based on the Stewart platform is controlled by using pneumatic actuators. Pneumatic actuators use motion and impact in this paper to cause wide-band exciting frequency. The change in frequency and pressure in the six cylinders is used to control the level of exciting vibration. Many control strategies are tested to improve the performance and one of the best control algorithms is suggested.