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border_sizes_left=”0″ border_sizes_right=”0″ min_height=”” link=””][fusion_button link=”https://www.universogiovani.it/supernova/” target=”_self” alignment=”center” color=”default” stretch=”default” icon_position=”left” icon_divider=”no” animation_direction=”left” animation_speed=”0.3″ hide_on_mobile=”small-visibility,medium-visibility,large-visibility”]Supernova[/fusion_button][/fusion_builder_column_inner][fusion_builder_column_inner type=”1_3″ layout=”1_3″ center_content=”no” hover_type=”none” target=”_self” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” border_style=”solid” border_position=”all” box_shadow=”no” box_shadow_blur=”0″ box_shadow_spread=”0″ background_type=”single” gradient_start_position=”0″ gradient_end_position=”100″ gradient_type=”linear” radial_direction=”center center” linear_angle=”180″ background_position=”left top” background_repeat=”no-repeat” background_blend_mode=”none” animation_direction=”left” animation_speed=”0.3″ filter_type=”regular” filter_hue=”0″ filter_saturation=”100″ filter_brightness=”100″ filter_contrast=”100″ filter_invert=”0″ filter_sepia=”0″ filter_opacity=”100″ filter_blur=”0″ filter_hue_hover=”0″ filter_saturation_hover=”100″ filter_brightness_hover=”100″ filter_contrast_hover=”100″ filter_invert_hover=”0″ filter_sepia_hover=”0″ filter_opacity_hover=”100″ filter_blur_hover=”0″ first=”false” last=”false” border_sizes_top=”0″ border_sizes_bottom=”0″ border_sizes_left=”0″ border_sizes_right=”0″ min_height=”” link=””][fusion_button link=”https://www.universogiovani.it/supernova/ed-fisiche/” target=”_self” alignment=”center” color=”default” stretch=”default” icon_position=”left” icon_divider=”no” animation_direction=”left” animation_speed=”0.3″ hide_on_mobile=”small-visibility,medium-visibility,large-visibility”]Edizioni Fisiche[/fusion_button][/fusion_builder_column_inner][fusion_builder_column_inner type=”1_3″ layout=”1_3″ center_content=”no” hover_type=”none” target=”_self” 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TO RANK (Testing and Optimization of a Robotic ANKle)
Gli ultimi anni hanno visto un crescente interesse nello sviluppo di esoscheletri per gli arti inferiori finalizzati a fornire assistenza al movimento fisico o trattamenti di riabilitazione in ambito clinico. L’uso di interventi robotici ha dimostrato il potenziale per: migliorare significativamente i risultati dei trattamenti riabilitativi in termini di intensità e ripetibilità; diminuire il periodo di ospedalizzazione; e trasferire la riabilitazione in un ambiente domestico.
In questo contesto è stato sviluppato un esoscheletro attivo indossabile per l’articolazione della caviglia progettato per l’assistenza alla deambulazione dei bambini affetti da paralisi cerebrale e denominato “TO RANK”. L’esoscheletro è dotato di un servomotore che è in grado di erogare una coppia massima di 35 Nm, il quale, tramite un sistema di manovellismo, trasferisce il moto all’arto inferiore. Questo sistema è stato realizzato in metallo, a cause delle ingenti sollecitazioni meccaniche a cui è sottoposto. La restante parte del prototipo è stata progettata in Nylon caricato al carbonio, un materiale dalle ottime proprietà meccaniche e dal peso contenuto, che è stato realizzato tramite stampa 3D, a partire dal modello CAD. La figura di fianco rappresenta il Concept del modello.
Terminata la fase di progettazione meccanica, si è passato allo studio del controllo del servomotore, al fine di determinare la velocità e l’ampiezza di rotazione in base ai vari input esterni. A tale scopo è stata inserita nella scarpa una soletta sensorizzata, grazie alla quale si riesce a percepire quale parte del piede è a contatto con il terreno e, utilizzando un software sviluppato ad hoc, verranno fornite al motore le informazioni riguardante i vari movimenti da compiere. La figura di fianco mostra il prototipo assemblato dove si possono distinguere i vari componenti:
- Manovellismo in metallo;
- Shell di ancoraggio gamba e servomotore in nylon-carbonio;
- Cablaggio;
- Servomotore RMD-X8 Pro;
La ricerca non si ferma mai e migliorerà sempre, chissà cosa ci aspetterà in futuro!
Simona Ceccangeli
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