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模型未知LTI系統的數據驅動(dòng)預測控制
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江南大學(xué) 輕工過(guò)程先進(jìn)控制教育部重點(diǎn)實(shí)驗室

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國家自然科學(xué)(62073154)


Data-driven Predictive Control for Model-unknown Linear Time Invariant system
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    摘要:

    針對含有隨機噪聲的模型未知線(xiàn)性時(shí)不變 (Linear Time Invariant, LTI) 系統模型建立過(guò)程復雜且控制律難以得到的問(wèn)題,提出一種基于數據驅動(dòng)的預測控制方法。基于系統行為學(xué)理論和平衡子系統辨識方法,僅利用測量得到的系統數據構建被控系統的非參數模型,將其和預測控制理論相結合設計出基于數據驅動(dòng)的預測控制器,對于系統測量數據中存在的有界加性高斯噪聲,通過(guò)引入數據的松弛變量和L2正則項來(lái)降低噪聲擾動(dòng)的影響,采用滾動(dòng)時(shí)域優(yōu)化策略計算最優(yōu)控制序列并將其作用于被控系統,實(shí)現系統對設定值的軌跡跟蹤。將所提控制策略應用于四容水箱系統,仿真結果表明與同樣基于數據驅動(dòng)的子空間預測控制方案相比,所提方法具有更好的動(dòng)態(tài)性能,且該策略在抗噪聲擾動(dòng)方面有明顯優(yōu)勢,具有更強的魯棒性。

    Abstract:

    To solve the problem that the modeling process of model unknown Linear Time Invariant (LTI) system containing stochastic noise is complicated and the control law is difficult to be obtained, a data-driven predictive control method is proposed. Based on the theory of system behavior and balanced subspace identification, the non-parametric model of the controlled system is built only by using the measured system data, and the data-driven predictive controller is designed by combining it with the predictive control theory. For the bounded additive gaussian noise existing in the measured data, the influence of noise disturbance is reduced by introducing the slack variable and quadratic regularization of the data. The receding horizon optimization strategy is used to calculate the optimal control trajectory and apply it to the controlled system to realize the stability control of the system. The proposed control strategy is applied to a quadruple tank system. The simulation results show that compared with the data-driven subspace predictive control scheme, the pr\posed strategy has better dynamic performance. Meanwhile, the proposed strategy also has obvious advantages in anti-noise disturbance and stronger robustness.

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徐凱,陳珺.模型未知LTI系統的數據驅動(dòng)預測控制計算機測量與控制[J].,2023,31(9):116-123.

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歷史
  • 收稿日期:2022-11-29
  • 最后修改日期:2023-01-03
  • 錄用日期:2023-01-03
  • 在線(xiàn)發(fā)布日期: 2023-09-18
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