Document Detail


Robust motor speed control under time varying loads in moving actuator type artificial heart (AnyHeart).
MedLine Citation:
PMID:  15521219     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The Moving Actuator type artificial heart(AnyHeart) as well as many other artificial hearts uses a motor as its power source. For controllability of control parameters such as pump rate, pump output, blood pressure profile and flow form, the precise motor speed control is important. However, because the implantable device has limited carrying capacity of hardware components in size and number, applying diverse motor control methods are not possible. In addition, the existing PI (Proportional-Integral) motor controller does not show satisfactory performance. A new controller that is sufficiently robust for the changes of load and physical system parameters has been designed and tested. The robust speed controller is based on the sliding mode control method that is applicable to a system of which the ranges of uncertainty in physical parameters are known. In a mock circulation system test, the actual speed showed good tracking characteristics in respect to the reference speed. Fast follow-up characteristics were also observed under high afterload and speed conditions. The speed error, current and power consumption were reduced by about 40%. The proposed control technique overcomes the limitations of the PI controller, and makes important improvements in both performance and stability.
Authors:
J J Lee; W E Kim; J Choi; J W Park; J Chung; K Nam; S K Park; H S Son; K Sun; B G Min
Related Documents :
2096659 - Superposition of arteriolar vasomotion waves and regulation of blood flow in skeletal m...
10394509 - Contribution of motor unit activity enhanced by acute fatigue to physiological tremor o...
11791679 - Dynamic in vitro quantification of bioprosthetic heart valve leaflet motion using struc...
23151959 - Haptic distal spatial perception mediated by strings: size at a distance and egocentric...
10996189 - Breathing frequencies of northern elephant seals at sea and on land revealed by heart r...
3703619 - Breath amplitude modulation of heart rate variability in normal full term neonates.
24925489 - Time-compensated celestial orientation in the cricket pteronemobius lineolatus.
3198869 - Illusory continuity of tonal and infratonal periodic sounds.
22137049 - Dichroism measurements in forensic fibre examination. part 2 - dyed polyamide, wool and...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The International journal of artificial organs     Volume:  27     ISSN:  0391-3988     ISO Abbreviation:  Int J Artif Organs     Publication Date:  2004 Sep 
Date Detail:
Created Date:  2004-11-03     Completed Date:  2005-02-10     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7802649     Medline TA:  Int J Artif Organs     Country:  Italy    
Other Details:
Languages:  eng     Pagination:  787-95     Citation Subset:  IM    
Affiliation:
Interdisciplinary Program in Medical and Biological Engineering Major, Graduate School Department of Biomedical Engineering, Seoul National University, Seoul, Korea.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Algorithms
Blood Pressure
Cardiac Output
Electric Power Supplies*
Friction
Heart Rate*
Heart, Artificial*
Humans
Models, Cardiovascular
Prosthesis Design
Torque

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Cavitation phenomenon in monoleaflet mechanical heart valves with electrohydraulic total artificial ...
Next Document:  Natural and synthetic polyesters for musculoskeletal tissue repair: experimental in vitro and in viv...