Plug-in direct particle swarm repetitive controller with a reduced dimensionality of a fitness landscape – a multi-swarm approach

• Autorzy: Ufnalski B. , Grzesiak L. M.

Identyfikatory

DOI

10.1515/bpasts-2015-0098

• Języki publikacji: EN

Abstrakty

EN

The paper describes a modification to the recently developed plug-in direct particle swarm repetitive controller (PDPSRC) for the sine-wave constant-amplitude constant-frequency (CACF) voltage-source inverter (VSI). The original PDPSRC algorithm assumes that the particle swarm optimizer (PSO) takes into account a performance index defined over the whole reference signal period. Each particle stores all the samples of the control signal, e.g. α = 200 samples for a controller working at 10 kHz and the reference frequency equal to 50 Hz. Therefore, the fitness landscape (i.e. the performance index) is -dimensional ( D), which makes optimization challenging. That solution can be categorized as the single-swarm one. It has been previously shown that the swarm controller does not suffer from long-term stability issues encountered in the classic iterative learning controllers (ILC). However, the convergence of the swarm has to be kept at a relatively low rate to enable successful exploitation in the D search space, which in turn results in slow responsiveness of the PDPSRC. Here a multi-swarm approach is proposed in which we divide a dynamic optimization problem (DOP) among less dimensional swarms. The reference signal period is segmented into shorter intervals and the control signal is optimized in each interval independently by separate swarms. The effectiveness of the proposed approach is illustrated with the help of numerical experiments on the CACF VSI with an output LC filter operating under nonlinear loads.

Słowa kluczowe

EN

repetitive process control; dynamic optimization problem; particle swarm optimization; repetitive disturbance rejection; noninteracting subswarms; dimension-reduced fitness functional

PL

powtarzalne sterowanie procesem; problem optymalizacji dynamicznej; optymalizator rojem cząstek; odrzucanie zakłóceń; sprawność funkcjonalna

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2015
• Tom: Vol. 63, nr 4
• Strony: 857--866
• Opis fizyczny: Bibliogr. 31 poz., rys., tab., wykr.

Twórcy

autor

Ufnalski B.

• Faculty of Electrical Engineering, Warsaw University of Technology, 75 Koszykowa St., 00-662 Warsaw, Poland

autor

Grzesiak L. M.

• Faculty of Electrical Engineering, Warsaw University of Technology, 75 Koszykowa St., 00-662 Warsaw, Poland

Bibliografia

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