MODELING OF STATIC CHARACTERISTICS OF PIEZOELECTRIC ACTUATOR FOR A MICROPUMP

Abstract

The pace of development of precision technologies is growing every year, which is inextricably linked with the improvement of precision dosing systems, positioning for promising areas of science and technology, such as robotics, laser technology, active and adaptive optics, medicine, biotechnology, nanotechnology, engineering and . Accordingly, with the creation of such modern systems, the requirements for accuracy, operating frequencies, generating forces, power actuators, etc. are growing. for modern equipment.

The piezoelectric actuator in the micropumps allows rate changes of flow for a wider range. Promising to ensure the continuity and accuracy of fluid supply are peristaltic micropumps with piezodrive, which create the fluid movement due to the bending deformation of the tube of the channel associated with the longitudinal or transverse piezoelectric effect. The study of the micropump actuator static and dynamic characteristics as an object of control is necessary to calculate the control systems of piezoelectric actuators for pumping small volumes of liquids. The static characteristics of multilayer connectors for peristaltic micropump had explored during the work. The multilayer piezoelectric actuator displacements with a longitudinal piezoelectric effect and voltage control, which is reinforced with an elastic element and connected to a membrane of polymer auxetic are calculated. The use of membranes from the auxetic in the design of the micropump will improve its functional and structural characteristics. The piezoelectric actuators of multilayer structure practical use needs knowledge of their basic characteristics: piezomodules, elastic ductility, modules of elasticity of polymeric auxetic. To increase the rigidity of the multilayer piezoelectric actuator mechanical characteristics its design is selected from the minimum elastic reporting.