TY - GEN
T1 - Duty ratio control of a rotary pwm valve with periodic measurement error
AU - Wang, Meng
AU - Li, Perry Y
PY - 2009
Y1 - 2009
N2 - The focus of this paper is on estimating system states in the presence of repetitive measurement noise. This estimation technique is applied to a novel self-spinning high speed rotary on/off valve that is being developed for pulse width modulating (PWM) fluid flow. The PWM duty ratio is determined by the valve spool's axial position. Unfortunately, the optical position measurement is corrupted by a repetitive noise, induced by the spool's rotary motion. Two models are developed to represent the periodic noise: one discrete time time invariant model based on internal model principle and a continuous time model that uses a set of periodic basis functions. Kalman filters are designed to estimate the spool position and the periodic noise. This estimates are used with a PI with feedforward controller for the spool position reference tracking. Simulation and experimental results indicate the usefulness of estimating the periodic noise.
AB - The focus of this paper is on estimating system states in the presence of repetitive measurement noise. This estimation technique is applied to a novel self-spinning high speed rotary on/off valve that is being developed for pulse width modulating (PWM) fluid flow. The PWM duty ratio is determined by the valve spool's axial position. Unfortunately, the optical position measurement is corrupted by a repetitive noise, induced by the spool's rotary motion. Two models are developed to represent the periodic noise: one discrete time time invariant model based on internal model principle and a continuous time model that uses a set of periodic basis functions. Kalman filters are designed to estimate the spool position and the periodic noise. This estimates are used with a PI with feedforward controller for the spool position reference tracking. Simulation and experimental results indicate the usefulness of estimating the periodic noise.
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U2 - 10.1109/ACC.2009.5160693
DO - 10.1109/ACC.2009.5160693
M3 - Conference contribution
AN - SCOPUS:70449652440
SN - 9781424445240
T3 - Proceedings of the American Control Conference
SP - 5073
EP - 5078
BT - 2009 American Control Conference, ACC 2009
T2 - 2009 American Control Conference, ACC 2009
Y2 - 10 June 2009 through 12 June 2009
ER -