Dr. Richard Russ Profile

Dr. Richard Russ

Post Doctoral Fellow at Univ of Hawai'i

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Author

Publications (5)

Proceedings Article | 7 April 2009 Paper

Vibration suppression of satellites using multifunctional platforms

Nicolas Antin, Mehrdad Ghasemi-Nejhad, Richard Russ, Kougen Ma

Proceedings Volume 7288, 72882C (2009) https://doi.org/10.1117/12.815867

KEYWORDS: Satellites, Composites, Finite element methods, Actuators, Smart structures, Data modeling, Structural design, Sensors, Control systems, Active vibration control

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Proceedings Article | 27 March 2006 Paper

A finite element analysis approach with integrated PID control for simultaneous precision positioning and vibration suppression of smart structures

Richard Russ, Mehrdad Ghasemi-Nejhad, Kougen Ma

Proceedings Volume 6166, 616617 (2006) https://doi.org/10.1117/12.658056

KEYWORDS: Actuators, Smart structures, Finite element methods, Composites, Sensors, Device simulation, Error analysis, Silicon, Modal analysis, Integrated modeling

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This paper focuses on the development of an ANSYS finite element analysis (FEA) environment with integrated PID control scheme for simultaneous precision positioning and vibration suppression of smart composite structures with piezoelectric flat patches acting as actuators. This environment includes three modules: structural modeling, PID controller design, and dynamic analysis of smart structures. Two types of PID controllers are investigated, namely, PID vibration suppression (PID-VS) controller and PID simultaneous precision positioning and vibration suppression (PIDSPPVS) controller. The PID-VS controller is suitable to perform only vibration suppression with no positioning capability. The PID-SPPVS controller is equipped with SPPVS capabilities. The characteristics of individual control gains and their behavior with respect to each other for the two PID controllers are also studied. The gain selection for the PID-VS controller is based on obtaining the best VS while the gain selection for the PID-SPPVS controller is based on achieving the best positioning accuracy and VS simultaneously. In this study, a horizontal cantilevered graphite/epoxy composite beam with one surface-mounted ACX piezoelectric flat patch located at the beam root is first modeled. Next, the FE modal analysis is performed to determine the natural frequencies and hence the time step interval needed for the FE transient analysis. During the transient analysis, the mid-point of the beam tip is subjected to different types of external excitations such as sine loadings with different frequencies as well as random forces to evaluate the two PID controller performances. It is demonstrated that the FEA model with integrated PID-SPPVS controller is able to reach the desired position in a much shorter time in comparison to the PID-VS controller. Vibration amplitude reduction capabilities for the both PID controllers are very similar, although the PID-VS controller performs slightly better. This study also implies that the integrated FEA environment, consisting of the structural modeling of active composite structures with piezoelectric flat patches, modal and transient analyses, controller design, and simulation, provides a powerful tool for the design, analysis, and control of smart structures with SPPVS capabilities.

Proceedings Article | 26 July 2004 Paper

Piezoelectric performance effectiveness for active composite panels with surface-mounted and embedded sensors and actuators using direct constant voltage scheme

Richard Russ, Mehrdad Ghasemi-Nejhad

Proceedings Volume 5390, (2004) https://doi.org/10.1117/12.539382

KEYWORDS: Actuators, Piezoelectric effects, Sensors, Finite element methods, Composites, Current controlled current source, Modal analysis, Ferroelectric materials, Chemical elements, Active vibration control

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Proceedings Article | 5 August 2003 Paper

A comparative study on the effectiveness of piezoelectric patches for active composite panels with surface-mounted and embedded sensors and actuators

Mehrdad Ghasemi-Nejhad, Richard Russ

Proceedings Volume 5056, (2003) https://doi.org/10.1117/12.483396

KEYWORDS: Actuators, Piezoelectric effects, Sensors, Composites, Finite element methods, Current controlled current source, Modal analysis, Ferroelectric materials, Chemical elements, Ceramics

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Proceedings Article | 10 July 2002 Paper

Vibration suppression schemes for active composite struts and panels

Richard Russ, Mehrdad Ghasemi-Nejhad

Proceedings Volume 4693, (2002) https://doi.org/10.1117/12.475238

KEYWORDS: Actuators, Composites, Sensors, Finite element methods, Ferroelectric materials, Adaptive optics, Ceramics, Space operations, Beam shaping, Active vibration control

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