Magnetorheological fluids are often proposed for applications requiring fast response and good controllability but the dynamic characteristics of the MR devices are seldom analyzed in detail. The aim of this study is to present a magnetorheological valve optimized for fast dynamical response. The fundamental design criteria for fast MR valves are discussed and an experimental valve designed for high frequency actuation is analyzed. It is shown the performance figures generally reported for MR technology can be significantly improved. The results show a step pressure difference of 7 MPa can be controlled with a response time of 0.7 ms. The maximum rate of change for controllable pressure was measured to achieve 20.2 MPa in one millisecond.

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