MECHANISMS POSITIONED IN A NEIGHBOURHOOD OF THEIR SINGULAR POSITIONS VELOCITY AMPLIFICATION IN THE ELECTROMAGNETIC DAMPING. PART 2. NUMERICAL VERIFICATIONS

KRZYSZTOF LIPINSKI

Abstract


In the paper, studies on the electromagnetic damping are presented. A continuous mechanical system and its vibrations are considered. To amplify the damping, a double-bar mechanism is introduced. Its position is set to a neighbourhood of its singular (kinematically) position. To improve its properties, tests are performed on a related numerical model. Two structurally different segments have to be considered in the model. The elastic part is composed of finite elements. The mechanism is modelled as a multibody system. Constraint equations joint the sub-models. The free mode vibrations are estimated. Its energy is converted into the electrical current (by use of a DC generator) and dissipated. As the fundamental task is to keep its work configurations in the singularity neighbourhood, an additional automatic control of the arms length is considered. Results are presented to confirm the effectiveness of the damping method. Key words:electromagnetic damping; velocity amplification; singular position; multibody modelling; finite elements; constraint equations.

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References


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