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Test platform dynamic performance evaluation method with input and output signal waveform comparison

A test platform and dynamic performance technology, applied in the direction of force/torque/work measuring instrument calibration/testing, measuring devices, instruments, etc., can solve the problem of no clear theoretical method, etc., and achieve intuitive evaluation methods, simple experimental devices, and broad Apply space effects

Inactive Publication Date: 2015-12-23
DALIAN UNIV OF TECH
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Problems solved by technology

[0003] The traditional dynamic performance evaluation method mainly observes whether the input and output waveform images are consistent, and there is no clear theoretical method to accurately express the relationship between the input and output waveforms

Method used

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  • Test platform dynamic performance evaluation method with input and output signal waveform comparison
  • Test platform dynamic performance evaluation method with input and output signal waveform comparison
  • Test platform dynamic performance evaluation method with input and output signal waveform comparison

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Embodiment Construction

[0014] The implementation process of the present invention is described in detail in conjunction with technical scheme and accompanying drawing, as figure 1 As shown, the electrodynamic exciter 5 is selected as the actuator, equipped with the corresponding excitation signal generator and power amplifier to achieve the required dynamic force, and the computer data acquisition system is used to collect the input force signal and output of the test platform force signal.

[0015] Experimental process of the present invention is as follows: according to figure 1 As shown in the figure, various equipment are installed and connected, and the vibrator 5 is suspended on the bench by rubber rope 6. The vibrator 5 is connected to the impedance head 3 through the ejector rod 4, and is connected to the thrust vector test platform to be calibrated. Lan connected. The excitation signal is generated by the signal generator and input to the exciter 5 after being amplified by the power ampli...

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Abstract

The invention provides a test platform dynamic performance evaluation method with input and output signal waveform comparison, belonging to the field of dynamic performance testing. The method can be applied to the fields of mechanical engineering, aerospace and the like to evaluate the dynamic performance of a test platform. An experimental device is formed by a signal generator, a power amplifier, a rubber rope, a vibration exciter, a jack, an impedance head, a test bench, a test platform, a charge amplifier, a data acquisition card and a computer. The evaluation method comprises the following steps that the ratio of an output waveform vertical coordinate absolute value to a horizontal coordinate time integral and an input waveform vertical coordinate absolute value to the horizontal coordinate time integral in the same cycle are compared, the dynamic performance of the test platform is good if the ratio is close to 1. The test device is simple, the operation is easy, the evaluation method is intuitive and easy to understand, the dynamic performance of the test platform can be quickly determined, and the method has broad application space.

Description

technical field [0001] The invention belongs to the field of dynamic performance testing, and relates to a method for evaluating the dynamic performance of a testing platform in aerospace. Background technique [0002] The requirements for measurement accuracy in the field of national defense and aerospace are getting higher and higher, which puts forward new requirements for the design of the test system; in the test platform, the sensor is a key component, and its performance directly affects the measurement accuracy. In particular, the quality of its dynamic performance directly affects the accuracy of measurement and real-time control. At present, the research on the static characteristics of the force sensor is more in-depth at home and abroad, while the research on the dynamic characteristics is less. With the development of modern high-precision testing instruments, the measurement means and methods of static force value have been perfected day by day, and the measur...

Claims

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Application Information

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IPC IPC(8): G01L25/00
Inventor 张军贾振元任宗金纪维磊刘巍王福吉
Owner DALIAN UNIV OF TECH
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