Multivariable robust control of sirius modular current source prototype

doi:10.1016/j.conengprac.2025.106244

Multivariable robust control of sirius modular current source prototype

2025-04-01

0

PRE

AI

T

Thiago Trindade Cardoso

P

Pedro M. de Almeida *

Vinícius F. Montagner

DOI：10.1016/j.conengprac.2025.106244

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This paper presents the design and experimental validation of a multivariable robust control strategy applied to the Brazilian Synchrotron Light Laboratory booster current source. The source, tasked with delivering a triangular waveform current, necessitates precise tracking with an error tolerance of less than 100 parts per million, in order to precisely inject electrons into the storage ring. Characterized by a complex, high-order multi-input multi-output structure with multiple series and parallel power modules, the system complexity is addressed through a model reduction technique based on the Hankel norm. Leveraging the reduced-order plant during controller design not only simplifies the system but also results in a lower-order controller. To guarantee robust stability and performance for the full-order plant, the approximation error is reintroduced as uncertainty into the reduced-order model. The controller design employs a weighted H infinity approach. Experimental validation using a small-scale prototype confirms the effectiveness of the proposed methodology in achieving precise tracking and robust performance.

Keyword:

High-precision tracking

Multivariable control

Model reduction

Robust control

Brazilian synchrotron light laboratory (LNLS)

Current source

Multivariable robust control of sirius modular current source prototype

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