Active vibration control

About: Active vibration control is a research topic. Over the lifetime, 6770 publications have been published within this topic receiving 76599 citations. The topic is also known as: active vibration damping.

Active Vibration Control of Piezolaminated Composite Plates Considering Strong Electric Field Nonlinearity

Abstract: A theoretical framework is presented for modeling active vibration control of smart multilayered plates integrated with piezoceramic sensors and actuators, considering their constitutive nonlinearity under a strong electric field. The application of an electric field beyond the linear threshold limit of piezoelectric materials is often necessary to achieve high actuation authority. A recently developed efficient layerwise theory, for which the computational efficiency and accuracy have been well established for linear electromechanical response, is employed for the laminate mechanics. The nonlinear finite element model for dynamic response is developed consistently using a variational principle, considering a rotationally invariant second-order constitutive relationship for piezoelectric materials. The nonlinear system is transformed to an equivalent linear system using the feedback linearization approach, through control input transformation. The linear quadratic Gaussian controller is adopted for contro...

Energy‐to‐peak control of seismic‐excited buildings with input delay

Abstract: The paper presents an energy-to-peak controller design approach for vibration attenuation of seismic-excited building structures with input delay. The time delay for the input is assumed to be uncertain time-invariant but has a known constant bound. An energy-to-peak state feedback memoryless controller is designed to attenuate the system response due to disturbance on the controlled output to a prescribed level even when the input delay exists. The design approach is formulated in terms of the feasibility of certain delay-dependent matrix inequalities. The performance of the presented control approach and the system stability when using this approach are demonstrated by numerical simulation results. It is confirmed by the simulations that the presented approach is a viable and realistic control strategy for applications to seismic-excited building structures. Copyright © 2006 John Wiley & Sons, Ltd.

Optimizing time delay feedback for active vibration control of a cantilever beam using a genetic algorithm

Abstract: Active vibration control using time delay for a cantilever beam is developed in this paper. The equation of motion of the system is developed using the discrete standard formulation, and the discrete quadratic function is used to design the controller. The original contribution in this paper is using a genetic algorithm to determine the optimal time delay feedback for active vibration control of a cantilever beam. Simulations of the beam demonstrated that the genetic algorithm correctly identified the time delay which produced the quickest attenuation of unwanted vibrations for both mode one and mode two. In terms of frequency response, the optimal time delay for both modes reduced the resonant amplitude. In a mixed mode situation, the simulation demonstrated that an optimal time delay could be identified.

Vibration Suppression in Cutting Tools Using a Collocated Piezoelectric Sensor/Actuator With an Adaptive Control Algorithm

Abstract: The machining process is very important in many engineering applications. In high precision machining, surface finish is strongly correlated with vibrations and the dynamic interactions between the part and the cutting tool. Parameters affecting these vibrations and dynamic interactions, such as spindle speed, cut depth, feed rate, and the part's material properties can vary in real-time, resulting in unexpected or undesirable effects on the surface finish of the machining product. The focus of this research is the development of an improved machining process through the use of active vibration damping. The tool holder employs a high bandwidth piezoelectric actuator with an adaptive positive position feedback control algorithm for vibration and chatter suppression. In addition, instead of using external sensors, the proposed approach investigates the use of a collocated piezoelectric sensor for measuring the dynamic responses from machining processes. The performance of this method is evaluated by comparing the surface finishes obtained with active vibration control versus baseline uncontrolled cuts. Considerable improvement in surface finish (up to 50%) was observed for applications in modern day machining.