Control Concept for Implantable Blood Pump

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Challenge

Task
  • Development of a control system for an implantable blood pump
Objective
  • Position control of the levitated rotor in the magnetic bearing
  • Speed control
  • Flow estimation
Constraints
  • Highest reliability requirements
  • High variability in operation (accelerations, cardiac activity)
  • Minimize power consumption for long battery life
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Approach

Feasibility studies
  • Comparison of different combinations of sensor and control concepts
Modelling
  • Physical modeling
  • Experiments for identification of model parameters
Simulation
  • Closed loop control with motor model and pump model
Tests
  • Automated test environment
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Technologies & Methods

Control engineering
  • Identification methods
  • Model-based control
  • Observer (e.g. Kalman filter)
Tools
  • Matlab
  • Python
  • C