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Large-scale high-speed rotary equipment cylinder contour error separation method based on simplex algorithm

A separation method and contour error technology, applied in measurement devices, instruments, geometric CAD, etc., can solve the problems of various offset errors and complex coupling forms of the measurement system, so as to solve the principle defects, improve the measurement efficiency, and improve the accuracy. Effect

Pending Publication Date: 2020-03-27
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

However, due to the limitation of processing technology level, there are many kinds of offset errors and complex coupling forms in the measurement system

Method used

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  • Large-scale high-speed rotary equipment cylinder contour error separation method based on simplex algorithm
  • Large-scale high-speed rotary equipment cylinder contour error separation method based on simplex algorithm
  • Large-scale high-speed rotary equipment cylinder contour error separation method based on simplex algorithm

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specific Embodiment 1

[0043] according to Figure 1-3 As shown, the present invention provides a method for separating cylindrical contour errors of large-scale high-speed rotating equipment based on simplex algorithm, which includes the following steps:

[0044] Step 1: Establish a cylindrical profile measurement model for large-scale high-speed rotating equipment;

[0045] Step 2: Determine the probe radius error and the tilt angle of the probe support rod;

[0046] Step 3: Determine the parameters to be estimated through the simplicity optimization algorithm and establish the objective function;

[0047] Step 4: For the objective function of each profile, the simplex optimization algorithm is used to estimate the estimated value of the parameter, and the influence is eliminated through the estimated value;

[0048] Step 5: The objective function is directly solved by the simplex optimizing estimation method to obtain accurate estimates of the overall eccentricity error, geometric axis tilt error and leas...

specific Embodiment 2

[0069] Specific embodiment 2: In order to obtain a more accurate bias error estimation value, the present invention introduces a simplex optimization algorithm, and the optimization estimation process is as follows:

[0070] 1) Select a suitable initial simplex, and given the corresponding shift coefficient r, the iteration termination condition ε> 0.

[0071] Since the selection of the initial point directly affects the recognition accuracy and calculation amount of the optimization search, the present invention firstly performs simplified estimation on the traditional two-parameter cylindrical profile measurement model in the selection of the initial simplex, and obtains {e 1 ,α 1 ,l,m,r o } Preliminary estimate:

[0072]

[0073] And have Then the first vertex of the initial simplex is The remaining 5 vertices are:

[0074]

[0075] among them: c is the edge length of the simplex, which constitutes an initial simplex S (1) .

[0076] 2) The vertices of the initial simplex are reor...

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Abstract

The invention relates to a large-scale high-speed rotary equipment cylinder contour error separation method based on a simplex algorithm. The large-scale high-speed rotary equipment cylinder contour error separation method comprises the following steps: establishing a large-scale high-speed rotary equipment cylinder contour measurement model; determining the probe radius error and the probe strutinclination angle: 3, determining to-be-estimated parameters through a simplex optimization algorithm, and establishing a target function; for the target function of each section contour, estimating by adopting a simplex optimization algorithm to obtain an estimated value of a parameter, and eliminating the influence through the estimated value; directly solving the target function by adopting a simplex optimization estimation method to obtain accurate estimation values of an overall eccentric error, a geometric axis inclination error and a least square radius of the cylindrical contour measurement model of the large-scale high-speed rotary equipment; and separating the multi-bias error point by point. According to the large-scale high-speed rotary equipment cylinder contour error separation method, on the premise that a measurement model and an error parameter estimation process are not simplified, accurate estimation and separation of multiple bias error parameters can be achieved atthe same time, and the error separation accuracy is remarkably improved.

Description

Technical field [0001] The invention relates to the technical field of error separation, and is a method for separating the cylindrical contour error of a large-scale high-speed rotating equipment based on a simplex algorithm. Background technique [0002] As a supplement to hardware processing technology, error separation technology is playing an increasingly important role in the field of precision engineering technology. Especially when measuring the surface shape of large rotating parts, it is extremely susceptible to the bias error of the measurement equipment system. As a result, the measurement accuracy requirements cannot be met. Therefore, it is urgent to separate the system errors through "soft technology" to obtain accurate surface shape measurement data and improve measurement accuracy. At present, the research on error separation at home and abroad mainly focuses on the separation of a single offset error parameter in the cylindrical profile model. Venkaiah uses lin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F30/20G06F111/10
CPCG01B21/20
Inventor 谭久彬刘永猛孙传智王晓明王宏业
Owner HARBIN INST OF TECH