Averaging sensors technique for active vibration control applications

2013 ◽  
Author(s):  
S. Cinquemani ◽  
G. Cazzulani ◽  
F. Braghin ◽  
F. Resta
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Control Applications ◽  
Active Vibration

Design of Smart Metal-Ceramic Composite Actuators for Macro-Motion Applications

1993 ◽  
Author(s):  
Sridhar R. Thirupathi ◽  
Nagi G. Naganathan
Keyword(s):  
Vibration Control ◽  
Motion Control ◽  
Ceramic Composite ◽  
Active Vibration Control ◽  
Smart Structure ◽  
Element Analysis ◽  
Control Applications ◽  
Elastic Composite ◽  
Metal Ceramic ◽  
Active Vibration

Abstract Piezoceramic, electrostrictive, and magnetostrictive materials are being increasingly applied in active vibration control and are being investigated for other motion control and damage mitigation applications. Typically, motion ranges required in active vibration control are of the order of a few microns. On the other hand, many mechanical and electromechanical motion control applications require the point of application of the load to move through at least a few millimeters. In this research, a smart ceramic-elastic composite actuator is invented for such motion control applications. The work presented in this paper includes the concept, its illustration, development of a design geometry based on this concept, and its finite element analysis and results. It will be shown that by a proper synthesis of smart structure, a class of such actuators can be successfully designed and realized in practice.

Efficient Active Vibration Control of Smart Structures With Modified Positive Position Feedback Control Using Pattern Search Methods in the Presence of Instrumentation Phase Lead and Lag

2013 ◽  
Vol 135 (6) ◽  
Author(s):  
Rajiv Kumar
Keyword(s):  
Vibration Control ◽  
Closed Loop ◽  
Active Vibration Control ◽  
Pattern Search ◽  
Systematic Design ◽  
Search Methods ◽  
Control Applications ◽  
Phase Lead ◽  
Position Feedback ◽  
Active Vibration

For active vibration control applications, positive position feedback (PPF) type controller is quite suitable. These controllers are of low order so are easy to implement in practice. These controllers avoid the problem of control spillover also. However, a systematic design methodology is not available for the design of these controllers. For multimode vibration control applications, in the presence of instrumentation, controller design becomes even more difficult. In the present paper, a systematic design procedure has been suggested to design the PPF controller. The proposed controller is designed by minimizing the H2 or H∞ norm of the closed loop (CL) system. The direct search methods based on pattern search technique has been used. The controller designed in this way can provide uniform damping to all the modes. The problems caused by the instrumentation (i.e., phase lead and lag) and time delay actually present in the control loop can be completely eliminated. Since, the controller is designed by minimizing the H∞ norm of the closed loop system, it is robust in nature. With the proposed methodology, the use of other complicated frequency domain techniques to design the controller can be avoided.

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