System Integration and Improvements

 

Prototype configuration

 

 

Prototypes are composed of mutiple mechanical parts mimicking insect morphology:

Eclated view of the prototype

  • The thorax:  it serves as a support for the future electronics and batteries would be embedded
  • The tergum: it acts with actuatr as a resonator to save energy
  • The wings: it creates and bear aerodynamic force using passive torsion mechanism
  • Transmission: it realizes a direct coupling between tergum and wings to optimize energy transfer

 

 

Improvements

 

 

Transmission

The transmission is composed of four compliant torsional hinges that allow a direct coupling between tergum and wings.

Wings

Figure 2: (a) All-SU-8 wing dorsal view (optical picture), and (b)-(e) its cross-sections (SEM). As shown in (c) and (d), the ratios of thickness to width of LEVs are around 0.5 to 0.7, close to those of natural LEVs. (e) shows membrane thickness.

The wings are fabricated completely in SU-8 or are composed of PDMS membranes and SU-8/PDMS/SU-8 triple-layered veins.  SU-8 wings approach real ones in overall weight, vein pattern, flexural stiffness and mass distribution. Our process allows an easy, reliable and fast way to produce artificial wings of complex geometry and morphology mimicking natural insect wings.

The wing motion is composed of a flexion motion that creates an important velocity of the membrane and a favorable angle of attack emerge from dephased torsion motion.

  • Article publié dans AMCSTI, juin 2018
    Article de Patricia Lefebvre sur la Nano-Ecole Lille Publié en juin 2018, Le Bulletin de l’AMCSTI bulletin_AMCSTI_2018 article_AMCSTI_2018   Merci à Anne Duchesne et Karine Perrot pour leur collaboration.
  • Projection du film « Monique Peytral, peindre Lascaux, peindre la vie »
    Vendredi 6 juillet de 12h45 à 13h45 IEMN / Amphithéatre, Villeneuve d’Ascq Exposition Monique PEYTRAL à l’IEMN du 19/06/2018 au 06/07/2018 Accès libre : de 9h00 à 12h00 et de 13h30 à 16h IEMN / Université de Lille – Sciences et Technologies, Villeneuve d’Ascq Une vidéo relatant ses différentes collaborations avec le CNRS (Lascaux II, […]