ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
This paper presents a computer-based tracking control approach for a piezoelectricactuator based on incorporating a feedforward loop with a PID feedback controller. The purpose ofthis paper is to improve the hysteresis characteristics of a stack type piezoelectric actuator using thehysteresis nonlinearity compensator. The system proposed in this study prints by spraying themolten metal, and consists of a nozzle, heating furnace, operating actuator, and an XYZ 3-axis stage.As an operating system, the piezoelectric(PZT) method has very valuable uses. The PZT actuator,however, has a hysteresis nonlinearity due to the ferroelectric characteristics of the PZT element.This causes problems in the system position control characteristics and deteriorates the performanceof the system. This study proposed a inverse hysteresis model, a mathematic modeling method thatcan express the geometric relationship between voltage and displacement, in order to reduce thehysteresis of the PZT actuator. In addition, system identification and PID control methods wereexamined. Also, it was confirmed that the proposed control strategy gives good trackingperformance
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.326-328.1399.pdf
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