Model Predictive Control Method Based on Decreasing Prediction Step Size

A technology of model predictive control and predictive step size, which is applied in the direction of adaptive control, general control system, control/regulation system, etc. It can solve the problems of unpredictable arrival time and unguaranteed arrival, so as to meet the control requirements and expand the feasible area , Optimizing the effect of system performance

Active Publication Date: 2020-04-10
JIANGNAN UNIV
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Problems solved by technology

[0004] Fixed-step predictive control can make the system state reach the terminal set within a finite time, but the specific arrival time cannot be predicted, and it cannot be guaranteed to arrive within the specified time

Method used

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  • Model Predictive Control Method Based on Decreasing Prediction Step Size
  • Model Predictive Control Method Based on Decreasing Prediction Step Size
  • Model Predictive Control Method Based on Decreasing Prediction Step Size

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0056] Technical scheme of the present invention is:

[0057] A Model Predictive Control Algorithm Based on Decreasing Prediction Step Size. It mainly includes: establishing a linear time-invariant system model, using H ∞ Type cost function, introducing affine state feedback control law with prior state memory, proposing a model predictive control algorithm with decreasing step size, feasibility and designated arrival time demonstration.

[0058] The specific steps include the following:

[0059] S1, establish a linear time-invariant system model, whose input satisfies certain constraints and disturbances with bounded norms, and the predicted output of the system can be obtained...

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Abstract

The invention discloses a model prediction control method based on a decreasing prediction step size. The model prediction control method based on the decreasing prediction step size is characterizedby comprising the steps that linear time invariant system model with a disturbing term is established, an H infinity type cost function is adopted, an affine state feedback control law with priori state memory is introduced, a decreasing step size model prediction control algorithm is proposed, and argumentation is conducted on feasibility and specified arrival time. The model prediction control method has the beneficial effects that based on variable step size prediction control, the arrival time is treated as an inflexible rule, decreasing step size model prediction control is proposed, it is guaranteed that system states can enter a terminal set in specified time, and meanwhile the time that the system enters the terminal set is reduced.

Description

technical field [0001] The invention relates to the field of industrial control, in particular to a model predictive control method based on decreasing predictive step size. Background technique [0002] Model predictive control has the ability to deal with system constraints, multi-variable system optimization problems and rolling optimization of system performance indicators, so it is also called rolling optimization control and has attracted extensive attention in the field of control. The recent "dual-mode" model predictive control assumes that a predetermined control law can be used to stabilize the system when the system state enters a specified set of terminal constraints. Therefore, the control problem can be divided into two steps. First, the variable step size control strategy is used to guide the system state into the terminal constraint set, and second, the predetermined control law is used to stabilize the system. If the system state can enter the terminal cons...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 杨玮林金林成许德智颜文旭
Owner JIANGNAN UNIV
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