Advanced control system for implantable blood pumps, featuring position and speed control, flow estimation, simulation, and automated testing for optimal performance and safety.

Advanced control system for implantable blood pumps, featuring position and speed control, flow estimation, simulation, and automated testing for optimal performance and safety.

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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