Adaptive structural PAR node

The adaptive structural node, so called PAR Node is a mechanical interface between structural members, capable of adjusting moment bearing capability of such an interface. Thanks to the state-of-the-art piezo–actuation technology and the unique design (patent pending), PAR Node maintains its maximum stiffness (50 times higher than in compliant mode) in idle state and switches to compliant mode within few milliseconds, completely changing the way loads are transferred through the interface. PAR Node transfers large moments (ca. 50 N m) relatively to its compact external dimensions (ca. 10 cm).

Main parameters of the PAR Node are the following:

  • height 78 mm,
  • outer diameter 88 mm,
  • weight 1,8 kg,
  • max. moment 50 Nm,
  • min. moment 1 Nm,
  • actuation voltage 0-150 V.
A modified version of the PAR Node can also be used as a voltage controlled clutch.

PAR_node_1.png
General view.

PAR Nodes are successfully used as embedded semi–active joints in frame structures to miti- gate vibrations by means of so called Prestress Accumulation–Release (PAR) Strategy (cf. PAR System).

Main advantages of the PAR node:

  • high transferred moment compared to com-pact design,
  • fast reaction time,
  • fail safe.
Possible applications:
  • efficient semi-active vibration attenuation with PAR System,
  • controllable clutch,
  • variable moment bearing joint,
  • structural fuse.

PAR_node_2.png
Transferred moment characteristic.

We look forward to cooperation

Get printable version: PAR_node_eng.pdf