Brief Stability of extremum seeking feedback for general nonlinear dynamic systems
Automatica (Journal of IFAC)
On non-local stability properties of extremum seeking control
Automatica (Journal of IFAC)
Technical communique: On the choice of dither in extremum seeking systems: A case study
Automatica (Journal of IFAC)
Brief paper: On global extremum seeking in the presence of local extrema
Automatica (Journal of IFAC)
Robust and adaptive design of numerical optimization-based extremum seeking control
Automatica (Journal of IFAC)
3-D Source seeking for underactuated vehicles without position measurement
IEEE Transactions on Robotics
Air flow control in fuel cell systems: an extremum seeking approach
ACC'09 Proceedings of the 2009 conference on American Control Conference
Brief paper: Speed regulation in steering-based source seeking
Automatica (Journal of IFAC)
Source seeking for two nonholonomic models of fish locomotion
IEEE Transactions on Robotics
Hi-index | 22.16 |
Many electromagnetic actuators suffer from high velocity impacts. One such actuator is the electromechanical valve actuator, recently receiving attention for enabling variable valve timing in internal combustion engines. Impacts experienced by the actuator are excessively loud and create unnecessary wear. This paper presents an extremum seeking controller designed to reduce the magnitude of these impacts. Based on a measure of the sound intensity at impact, the controller tunes a nonlinear feedback to achieve impact velocities of less than 0.1m/s while maintaining transition times of less than 4.0ms. The control strategy is implemented with an eddy current sensor, to measure the valve position, and a microphone.