Topic
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.
Papers published on a yearly basis
Papers
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13 Aug 1990TL;DR: In this article, an adaptive-type vibration control apparatus for actively controlling vibration of an object (3) mounted on a movable base member (1,210) with vibration-isolating means therebetween.
Abstract: An adaptive-type vibration control apparatus for actively controlling vibration of an object (3) mounted on a movable base member (1,210) with vibration-isolating means therebetween. The apparatus includes a vibration sensor (13) secured to the object (3) for detecting vibration thereof, an actuator (12) secured to the object (3) for applying an inverse vibration thereto, and a digital filter (8) with an input (R) connected to the vibration sensor (13) and an output (S) connected to the actuator (12). The digital filter (8) is adapted to generate an output signal for controlling the actuator such that the vibration of the object (3) is at least suppressed by the inverse vibration applied to the object by the actuator (12). The vibration is actively controlled and reduced without being affected by resonance peak frequencies, particularly when the object (3) is applied with vibration over a wide frequency range, or with vibration of a random or periodic nature.
27 citations
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TL;DR: For linear delay-differential equations, a question of ongoing interest is to determine conditions on the equation parameters that guarantee exponential stability of solutions as mentioned in this paper, and such an idea is presented and exploited in the control of active vibrations.
26 citations
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TL;DR: In this paper, the authors proposed a simple method by utilizing discontinuous spring characteristics, which can suppress steady-state resonances, and showed that this method is also effective to suppress unstable vibrations.
Abstract: Unstable vibration occurs in the vicinities of the major critical speeds of asymmetrical shaft and rotor systems. It occurs also in a wide rotational speed range higher than the major critical speed of a shaft with a hollow disk partially filled with liquid. The occurrence of the unstable vibrations is a serious problem because the amplitude increases exponentially, and finally, the system is destroyed. The active vibration control can suppress unstable vibrations but the method is generally complicated and costly. No simple effective method to suppress unstable vibrations has been developed yet. In the previous paper, the authors proposed a simple method by utilizing discontinuous spring characteristics, which can suppress steady-state resonances. This paper shows that this method is also effective to suppress unstable vibrations. By using this method, the unstable vibrations can be changed into almost periodic motions, and the amplitudes are suppressed to the desired small level even in an unstable range. The validity of the proposed method is also verified by experiments.
26 citations
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TL;DR: In this paper, shape memory alloys (SMAs) are used to control the vibration of a flexible cantilever beam in a push-pull fashion based on H-infinity theory and taking into account the uncertainty in the actuator performance.
Abstract: This paper demonstrates the feasibility of using shape memory alloys (SMAs) as actuators to control the vibration of a flexible cantilever beam In a tendon mechanism, SMAs are controlled in a push–pull fashion based on H-infinity theory and taking into account the uncertainty in the actuator performance Using this mechanism, the four vibrational modes (three bending and one torsional) of the cantilever beam can be simultaneously damped To control bending and torsional vibrational modes of a flexible beam, we install SMAs obliquely in a beam–SMA structure, then measure and theoretically model the properties of an actuator consisting of an SMA and a spring Using the properties of the actuator, we introduce the state equations based on the dynamic model of the proposed beam–SMA structure and design the active control system according to H-infinity theory Finally, we experimentally verify the functioning of the system
26 citations
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TL;DR: In this article, a natural combination of industrial PD/PID control with fuzzy compensation is proposed, and the main contribution of this paper is that the stability of the fuzzy PD/pID control is proven with standard weight training algorithms.
Abstract: Although most real building structure controllers are in the form of proportional-derivative/proportional-integral-derivative (PD/PID), there have been few published theory results of PD/PID on structural vibration control. In order to minimize the regulation error, a PD/PID control needs relatively large derivative and integral gains. These deteriorate the transient performances of the vibration control. In this paper, a natural combination of industrial PD/PID control with fuzzy compensation is proposed. The main contribution of this paper is that the stability of the fuzzy PD/PID control is proven with standard weight training algorithms. These conditions give explicit selection methods for the gains of the PD/PID control. Experimental studies on a two-story building prototype with the controllers are addressed. The experimental results validate our theoretical analysis.
26 citations