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u control system based on multi-rate delay state space model

A state-space model and control system technology, applied in the general control system, control/regulation system, program control, etc., can solve problems affecting product yield and product quality decline

Active Publication Date: 2020-11-24
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the characteristics of high rate and interference of colored noise in the industrial process, the actual operating conditions are often different from the production plan, which seriously affects the product yield and eventually leads to a decline in product quality

Method used

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  • u control system based on multi-rate delay state space model
  • u control system based on multi-rate delay state space model
  • u control system based on multi-rate delay state space model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0049] (1) Let time k=1, assuming the initial parameter value n is a real number, the initial step size is 1 / γ(0)=1, p 0 =10 6 , is the estimate of θ at time k.

[0050] (2) Collect input and output data u(kτ) and y(kτ), where τ is the sampling interval, assuming that the system is a state-space model that exists widely in process control, x(k)∈R n is the state vector, which refers to the motion state of the system. In the state vector, there is a delay of d steps. y(k) is the measurable output data. The system will generate a series of observations, which include the observation of the sensor or the system to be controlled Behavior, which needs to be observed, is the output of the system, the output of the system is related to the current state of the system and the input, y(k) has colored noise ω(k), ω(k) is composed of v(k) containing zero-mean random noise , considering that the state x(k) is unknown, from the measurable input and output data {u(k), y(k):k=1,2,...}, ...

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Abstract

The invention discloses an identification method based on a multi-rate delay state space model and a U control system. The identification model of the delay system is established according to the known input data and the known output data; The delay system is converted into an identification model in the form of least squares, and the output data is approximated by the initial parameters of the identification model and the constructed information vector. The unknown parameters and information vectors in the model are replaced by their estimated values. The measured input and output data can identify the output parameters at the current moment; finally identify the parameter values ​​and state values, and use the multi-innovation algorithm to identify the identified parameters at the current output sampling time, so as to obtain the final identification parameter values ​​and state values; The identified model adopts U control design, no need to classify linear / nonlinear, polynomial / state space model structure, which provides great simplification / generality.

Description

technical field [0001] The invention relates to the field of identification method and U control design of delay state space system, and belongs to the field of complex industrial process identification and control. Background technique [0002] In complex industrial processes, there are often some unmeasurable variables: such as the concentration of product components in distillation towers in chemical processes. These unmeasurable variables are often used to describe the dynamic characteristics of these processes. Due to physical conditions or economic constraints, for example, some online sensors are extremely expensive, resulting in the lack of online measurement methods for some key variables, or only a few hysteresis laboratory test values, it is difficult to effectively control and improve production efficiency and reduce costs. For this kind of complex system, the traditional equal period sampling data computer control modeling theory and identification method are no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418
CPCG05B19/41885G05B2219/32339Y02P90/02
Inventor 顾亚高津津刘继承鲁明丽朱培逸丑永新
Owner CHANGSHU INSTITUTE OF TECHNOLOGY