Passive, Adaptive, Active Vibration Control, and Integrated Approaches

Abstract

Passive vibration control solutions like tuned vibration absorbers are often limited to tackle a single structural resonance or a specific disturbance frequency. Active vibration control systems can overcome these limitations, yet requiring continuously electrical energy for a sufficient performance. Thus, in some cases, a passive vibration control system is still preferable. Yet, the integration of active elements enables adaptation of the system parameters, for instance, the resonance of a tuned vibration absorber. These adaptive or semi-active systems only require external energy for the adaptation, while the compensating forces are generated by the inertia of the absorber's mass. In this contribution, the fundamentals of active, passive, and adaptive vibration control are briefly summarized and compared regarding their main advantages and design challenges. In the second part, a design of an inertial mass device with integrated piezoelectric actuators is presented. By applying a lever mechanism, the stiffness of the inertial mass device can be tuned even to very low frequencies. The device can be used to implement both adaptive tuned vibration absorbers and active control systems. In the last section of the chapter, the device is used in an experiment for vibration control of a large elastic structure. The setup is used to demonstrate different strategies for the realization of a vibration control system and the integration of different vibration control strategies.

Existing Vibration Control Techniques Applied in Construction and Mechanical Engineering

“…It uses an active feedback control system that continuously measures and detects vibrations and quickly responds by generating counteracting forces to neutralize or offset them. As a result, active vibration control systems aid in getting over the restrictions of addressing a single structural resonance or a particular disturbance frequency, and incorporating active components allows for system parameter adaptability [46]. Hence, significant attention has been devoted to employing active control methods for both machinery mounting and structural control.…”

“…These utilize the inertial mass principle to generate forces that dampen or eliminate vibrations. These actuators use the principle of inertia to create details that effectively reduce vibrations and improve the overall system's stability and performance [46].…”

“…Therefore, only when the inertial mass actuator runs far above the resonance frequency can it be said to be a reliable force generator. [46]. The actuator consists of a fixed core to which a cylindrical coil of electronic components is attached, as shown in figure 6.…”

Hybrid Mass Damper: Theoretical and Experimental Power Flow Analysis

“…the damper will work as a tuned mass damper when the controller is turned off [29]. Systems have been proposed such as an HMD with H∞ optimum parameters to minimize both response and control effort [30], a fail-safe system [31], a dual loop approach to increase stability margins [32], an FXLMS controller with a resonant isolation system (SARIB) for helicopter applications [33], delay resonators [34], a tunable vibration absorber [35], an adaptive inertial mass device [36] and an hyperstable HMD [25,37].…”