Parallel Vibration Isolation Platform Using Magnetorheological Technology

Abstract

Precision controlled vibration isolation utilizing magnetorheological (MR) fluid technology for potential space optical applications, such as surveillance and directed energy, is addressed. This research includes the design, development and preliminary testing of a semi-active, proof-of-concept, MR vibration isolator. Base disturbances designed to produce payload vibration responses were employed in a single degree-of-freedom test apparatus. The MR vibration isolator served as the load-coupling element between the payload and the base disturbance input. The three-parameter isolator consists of two passive spring elements combined with one MR damping element. The MR damper control algorithm uses relative rate between damper cylinder and piston to dynamically vary the effective coefficient of damping. The result of this technology is ability to tune isolation frequency within a given range. Through intelligent modulation of the damping element alone, dynamic changes in both apparent stiffness and damping of the isolator are achieved. For applications where the ability to vary stiffness and damping would improve pointing accuracy and jitter control, this technology holds great appeal.

Modeling and control of magnetorheological 6-DOF stewart platform based on multibody systems transfer matrix method

“…It is a parallel mechanism and composed of a coulomb friction member and a viscous damper, as shown in figure 8. The damping force is expressed as equation (10)…”

“…The motion of the upper platform of Stewart mechanism was tracked by controlling the telescopic quantity of the six legs namely actuator. The currently used actuators mainly include hydraulic type [7], linear motor type [8], piezoelectric type [9] and magneto-rheological type [10]. Magnetorheological damper, namely MRD is widely used in mechanical vibration isolation system for the low energy consumption, simple structure and fast response.…”

“…The analysis and simulation results showed that the 6-MVS can exactly produce the required micro-vibration spectrum. Wang et al [10] studied the parallel vibration isolation system based on magnetorheological technology. The numerical simulation results showed that the semi-active parallel vibration isolation system had a good vibration isolation effect on six freedoms.…”

Grey relation analysis of natural frequency and semi-active robust optimal control of a multi-dimensional isolator based on parallel mechanism and magneto-rheological damper

“…So far, many researches have been investigated on isolation performance of the isolator based on parallel mechanism. Wang et al 5 have looked into a novel double piston magneto-rheological (MR) damper for a cubic Stewart platform, aiming at weight reduction. The dynamic model has been established and validated.…”

Modeling and Vibration Analysis of a 3‐UPU Parallel Vibration Isolation Platform with Linear Motors Based on MS‐DT‐TMM

“…It should be noted that not only advanced approaches were proposed by researchers, but also remarkable improvements have also been obtained in vibration isolation devices with the rapid development of material science and electronics technology. For example, the circular ring isolators [8], nonlinear energy sinks [9,10], the parallel platforms [11] and isolators designed with multifunctional metamaterials [12], and quasizero stiffness (QZS) isolator with two, three, or more pairs of oblique springs [13][14][15] have gradually been developed and applied to the vibration isolation, which are more powerful than the traditional vibration isolators such as air spring suspension and wire rope shock absorber.…”