Improved self-adaptive generalized predictive control method for data-driven time delay system

A technology of generalized predictive control and time-delay systems, applied in the field of adaptive control

Pending Publication Date: 2021-02-05
江康(上海)科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The object of the present invention is to provide a data-driven time-delay system im

Method used

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  • Improved self-adaptive generalized predictive control method for data-driven time delay system
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  • Improved self-adaptive generalized predictive control method for data-driven time delay system

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Embodiment

[0063] Embodiment: The present invention performs adaptive generalized predictive control on the central air-conditioning chilled water circulation system based on data.

[0064] Figure 5 Figure a is the effect diagram of PID control of the chilled water circulation system without time lag, and picture b is the effect diagram of PID control of the chilled water circulation system with time delay;

[0065] The chiller is one of the core equipment of the central air conditioner. Its working principle is divided into four steps: (1) The energy exchange between the refrigerant and the chilled water, the steam pressure in the evaporator is increased, the chilled water is reduced to low-temperature water, and the refrigerant becomes a high-temperature and low-pressure gas ;(2) The refrigerant changes from high-temperature and low-pressure gas to high-temperature and high-pressure gas under the drive of the compressor, and enters the cooling chamber; (3) The cooling water exchanges ...

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Abstract

The invention discloses an improved self-adaptive generalized predictive control method for a data-driven time delay system, which comprises the following steps of: firstly, determining a controlled variable and a controlled variable, acquiring input and output data of a time-delay system to construct a historical database, processing abnormal data, and adopting a time-varying forgetting factor recursive least square method to establish an autoregressive integral moving average model with controlled quantity of the time delay system; designing a reference trajectory according to the expected value, solving a Diophantine equation, designing a GPC control law, and constructing an optimization performance index; and calculating and implementing the optimal control quantity, collecting input and output data, and updating a historical database. According to the invention, the time lag problem of the system can be effectively solved, the utilization rate of offline and online input and output measurement data is improved, the influence of input and output interference and abnormal data on control is effectively inhibited, and the stability and good robustness of the system are ensured.

Description

technical field [0001] The invention relates to the technical field of adaptive control, in particular to an improved adaptive generalized predictive control method for a data-driven time-delay system. Background technique [0002] In the objective world and in the actual process, time delay is a widespread phenomenon. In large-scale systems, especially in industrial process control, most of the controlled objects have strong time-delay characteristics, such as the combustion chamber of a rocket transmitter. Combustion process, molten iron process in steelmaking plant, temperature control process of distillation stage, etc., are very typical systems with time-lag characteristics in actual control. [0003] In the actual control process, most systems are more or less nonlinear and uncertain, which makes the system show different degrees of time-lag due to the influence of objective factors, and the existence of time-lag will make the control of the controlled system Therefor...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 康琦包晗秋张林曲毅
Owner 江康(上海)科技有限公司
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