TY - JOUR
T1 - Optimal Controller of a Buck DC-DC Converter Using the Uncertain Load as Stochastic Noise
AU - Hsieh, Fei Hu
AU - Yen, Nie Zen
AU - Juang, Yau Tarng
PY - 2005/2
Y1 - 2005/2
N2 - This paper presents an optimal design approach for the pulsewidth modulation switching control of a buck DC-DC converter by modeling the converter as a stochastic linear system with noise of uncertain load. Firstly, we temporarily assume that the stochastic system is available with complete state, and then derive an optimal state feedback control for the optimal noise regulation in steady state. Secondly, from the steady-state viewpoint, the optimal state feedback control is transferred into an equivalent error-driven servo controller, and then the designed optimal control law is implemented using a phase lead-lag controller. A distinctive advantage of this approach is that the optimal controller's parameters are actually independent of the statistics of the assumed uncertain load noise, so the benefit of optimal noise regulation is assured for global operation. Furthermore, the optimal controller is easily implemented. As a matter of fact, by just using the simplest possible operation amplifier circuits, the controller can be implemented.
AB - This paper presents an optimal design approach for the pulsewidth modulation switching control of a buck DC-DC converter by modeling the converter as a stochastic linear system with noise of uncertain load. Firstly, we temporarily assume that the stochastic system is available with complete state, and then derive an optimal state feedback control for the optimal noise regulation in steady state. Secondly, from the steady-state viewpoint, the optimal state feedback control is transferred into an equivalent error-driven servo controller, and then the designed optimal control law is implemented using a phase lead-lag controller. A distinctive advantage of this approach is that the optimal controller's parameters are actually independent of the statistics of the assumed uncertain load noise, so the benefit of optimal noise regulation is assured for global operation. Furthermore, the optimal controller is easily implemented. As a matter of fact, by just using the simplest possible operation amplifier circuits, the controller can be implemented.
KW - Pulsewidth modulation (PWM)
KW - optimal control
KW - stochastic linear system
KW - switching power supply
UR - http://www.scopus.com/inward/record.url?scp=14644446102&partnerID=8YFLogxK
U2 - 10.1109/TCSII.2004.840113
DO - 10.1109/TCSII.2004.840113
M3 - 期刊論文
AN - SCOPUS:14644446102
SN - 1549-7747
VL - 52
SP - 77
EP - 81
JO - IEEE Transactions on Circuits and Systems II: Express Briefs
JF - IEEE Transactions on Circuits and Systems II: Express Briefs
IS - 2
ER -