A method for processing multivariate calibration wind tunnel balance data
A technology of a wind tunnel balance and a processing method, which is applied in electrical digital data processing, special data processing applications, complex mathematical operations, etc. The effect of accuracy
Active Publication Date: 2021-07-13
LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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Problems solved by technology
[0004] Therefore, the existing calibration methods have many preconditions and are difficult to meet, which greatly increases the difficulty of wind tunnel balance calibration. The square interference term of the balance formula coefficient and the quadratic When the cross-interference item is used in the wind tunnel test, distortion will occur, thereby increasing the measurement error of the balance, especially for the balance with poor stiffness and serious secondary interference
Therefore, it is urgent to propose a new data processing method to solve the errors caused by the current data processing methods.
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[0048] The wind tunnel balance is used to test the working load data in the wind tunnel and is a highly sensitive instrument. In actual work, the wind tunnel balance needs to be calibrated in advance, and then used for testing. If the calibration work cannot achieve a good calibration effect, there will be great errors in the measurement data of the wind tunnel balance, which is not conducive to the measurement work. In view of this situation, this embodiment discloses a method for calibrating a wind tunnel balance, specifically as follows:
[0049] Such as figure 1 As shown, a multivariate calibration wind tunnel balance data processing method, including:
[0050] S01: Determine the initial linear matrix, and then determine the initial linear matrix by removing the load and output of the initial point for all points in the load series. Take the data of TH1602 balance as an example, as shown in Table 1.
[0051]
[0052] S02: Determine the zero-load output, under the rate...
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The present invention relates to the technical field of wind tunnel balances, in particular to wind tunnel balance calibration, and in particular to a multivariate calibration wind tunnel balance data processing method, including determining the initial linear matrix, determining the zero load output, determining the additional load, and determining the final load, according to The resulting calibration loads are then used to determine the calibration matrix. The invention improves the accuracy of data measurement and reduces the error of the wind tunnel balance in the actual work process by preprocessing the balance load and then calibrating the balance. By using the data processing method to process the balance, the measurement and statistical results of the balance are better than the data processing method in the prior art, and have more advantages in processing the balance with obvious nonlinear interference.
Description
technical field [0001] The invention relates to the technical field of wind tunnel balances, in particular to the calibration of wind tunnel balance data, and in particular to a processing method for multiple calibration wind tunnel balance data. Background technique [0002] The wind tunnel balance is a measurement device used in the wind tunnel to measure the aerodynamic force and moment of the airflow acting on the model. It needs to be calibrated in the use of the wind tunnel balance. The current calibration method for the wind tunnel balance is mainly segmented curve fitting Cell Calibration Method. This method uses a model in which the bridge output is defined as the independent variable and the force and moment components are defined as the dependent variable. The principle of least squares is commonly used in curve fitting of experimental calibration data to a chosen mathematical model, and in this process, as usually applied, the assumption of the independent varia...
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IPC IPC(8): G06F30/20G06F17/18G06F17/16G06F119/14
CPCG06F17/16G06F17/18G06F30/20G06F2119/14
Inventor 李付华张逊赵亮亮张卫国张林岳廷瑞薛伟梁磊黄志银
Owner LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT