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Self-Sensing Physiologic Control of a Rotary Mag Lev LVAD

Award Information
Agency: Department of Health and Human Services
Branch: National Institutes of Health
Contract: 1R43HL090039-01
Agency Tracking Number: HL090039
Amount: $92,148.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: N/A
Solicitation Number: N/A
Timeline
Solicitation Year: 2007
Award Year: 2007
Award Start Date (Proposal Award Date): N/A
Award End Date (Contract End Date): N/A
Small Business Information
MOHAWK INNOVATIVE TECHNOLOGY 1037 WATERVLIET-SHAKER RD
ALBANY, NY 12205
United States
DUNS: 883926594
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 JAMES WALTON
 () -
Business Contact
 MELISSA HESHMAT
Phone: (518) 862-4290
Email: mheshmat@miti.cc
Research Institution
N/A
Abstract

DESCRIPTION (provided by applicant): The overall objective of the proposed SBIR Program is to develop a novel physiologic control system for use with the rotary centrifugal MiTiHeart LVAD that employs a magnetically suspended impeller with a hybrid active/passive magnetic bearing support system wherein only the thrust bearing is actively controlled. The fundament premise forwarded is that the available system data sets will provide a self-sensing and redundant method of controlling pump output while avoiding the detrimental conditions associated with negative flow or suction/cavitation at the inlet. It is expected that the pump operation will be different for a normally operating pump and one undergoing negative flow or suction at the inlet due to the lower inlet pressure and hence fluid forces acting on the rotor. By monitoring pump operating parameters a novel and reliable pump speed control system will be developed that avoids inlet suction/cavitation and/or negative flow. The goal of Phase I project is to demonstrate the feasibility of using the measured pump parameters for pump control through a parametric study that would lead to the development of the appropriate control scheme. The goal of Phase II will be to evaluate the control scheme using established computer simulation models to refine the Phase I control algorithm and controller for the MiTiHeart LVAD. The controller and algorithm will then be validated through instrumented non-pulsatile and pulsatile mock loop in vitro testing. Final Phase II validation testing will be accomplished through in vivo animal studies. The proposed high-speed machining center will be used by dentists and/or dental laboratory technicians for fabrication of ceramic dental restorations. The proposed machining center will be designed with an innovative integrated air-driven, high-speed, precision, spindle/motor assembly to allow high machining rates while ensuring low potential for machining damage: thus, enabling rapid fabrication of low-damage dental restorations by machining.

* Information listed above is at the time of submission. *

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