Vibration suppression of railway vehicles using a magneto-rheological fluid damper and semi-active virtual tuned mass damper control

Abstract

A semi-active virtual tuned mass damper (SAVTMD) control algorithm is developed to suppress vibrations of a railway vehicle by using magneto-rheological (MR) damper. To this end, a virtual-tuned-mass-damper control algorithm analogous to the tuned mass damper was developed prior to the semi-active application. The proposed SAVTMD control algorithm uses the acceleration of the car body directly, so that it is more practical than the sky-hook control algorithm that uses the velocity of the car body. The application of the SAVTMD control to a real MR fluid damper is discussed, and a step-by-step procedure to calculate the command voltage to the driver of the MR fluid damper is presented. A hardwarein-the-loop simulation system developed in the previous study is used to test the SAVTMD control algorithm. The theoretical and experimental results showed that the proposed SAVTMD control algorithm is more effective than is the semi-active sky-hook control in suppressing vibrations of the car body of the railway vehicle by the MR damper.

Development of multi-input multi-output virtual tuned mass damper controls for the vibration suppression of structures

“…in which, m a is the gain that can be thought of as the mass of the virtual tuned mass damper, ζ a is the damping factor of the VTMD controller that is generally set to 0.3 to provide reasonable control bandwidth, and ω a is the filter frequency of the VTMD controller that is normally tuned to either the driving frequency, or the natural frequency of the primary structure. Shin et al 13 found that the control algorithm expressed by equation ( 2) exactly emulates the dynamic characteristics of the tuned mass damper shown in Figure 2. The VTMD controller amounts to attaching a passive TMD to the primary mass, as shown in Figure 2.…”

“…Considering that the most popular sensor for vibration measurement is an accelerometer, Shin et al 13 proposed the SISO Virtual Tuned Mass Damper (VTMD) control that is expressed by equation ( 2)…”

“…Considering that the most popular sensor for vibration measurement is an accelerometer, Shin et al 13 proposed the SISO Virtual Tuned Mass Damper (VTMD) control that is expressed by equation (2)where, trueF¯(s),trueA¯(s) are the Laplace transforms of f(t),a(t)=truex¨(t), andin which, ma is the gain that can be thought of as the mass of the virtual tuned mass damper, ζa is the damping factor of the VTMD controller that is generally set to 0.3 to provide reasonable control bandwidth, and ωa is the filter frequency of the VTMD controller that is normally tuned to either the driving frequency, or the natural frequency of the primary structure. Shin et al 13 found that the control algorithm expressed by equation (2) exactly emulates the dynamic characteristics of the tuned mass damper shown in Figure 2. The VTMD controller amounts to attaching a passive TMD to the primary mass, as shown in Figure 2.

Figure 2.A spring mass damper system with tuned mass damper.

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“…A control algorithm that can calculate the control force equivalent to the inertia force of TMD was proposed under the assumption that a force actuator can be used, [10][11][12][13] which leads to the so-called virtual tuned mass damper (VTMD) control algorithm. Shin et al 13 investigated the concept of virtual tuned mass damper control by comparing the single degree-offreedom system having control force with the two degrees-of-freedom system consisting of the primary mass and tuned mass damper. They developed a new VTMD control algorithm using the acceleration measurement directly.…”

Active Approaches to Vibration Absorption through Antiresonance Assignment: A Comparative Study

“…For example, in [97] the VATMD is exploited to suppress the self-excited vibration that arises between the girder and magnetic levitation vehicles by performing an active antiresonance assignment through an electromagnetic control force; numerical simulations corroborate the effectiveness of the technique. The semi-active TMD using a magneto-rheological fluid damper for controlling the vibration of railway vehicles is proposed in [98] with an experimental application.…”