Non-destructive evaluation method for nonlinear characteristic parameters of hydro-pneumatic suspension

A technology of oil-pneumatic suspension and characteristic parameters, which is applied in the direction of elastic testing, machine/structural component testing, vehicle suspension/shock-absorbing mechanism testing, etc. It can solve problems such as cumbersome testing methods, inconsistent use conditions, and difficult implementation of testing. Achieve fast and effective characteristic parameters and performance, strong practicability, and rapid evaluation process

Inactive Publication Date: 2011-09-07
HUNAN UNIV
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Problems solved by technology

This test method is relatively cumbersome, and it is difficult to implement detection in post-manufacturing services. At the same time, since the stiffness and damping characteristics are tested separately, the traditional test ignores the influence of the coupling characteristics of stiffness and damping in theory, and it is different from the actual use conditions. will be inconsistent

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  • Non-destructive evaluation method for nonlinear characteristic parameters of hydro-pneumatic suspension
  • Non-destructive evaluation method for nonlinear characteristic parameters of hydro-pneumatic suspension
  • Non-destructive evaluation method for nonlinear characteristic parameters of hydro-pneumatic suspension

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] The present invention is based on the existing oil-gas suspension bench test and test, based on the reverse calculation technology, only one dynamic test is carried out, and through continuous iterative calculations, the displacement-elastic force, speed-damping of the oil-gas suspension can be calculated A one-time overall evaluation of the two nonlinear characteristics of force.

[0031] Such as Figure 4 Shown, concrete steps of the present invention are as follows:

[0032] Step 1: Build image 3 The bench test test system of the traditional oil-pneumatic suspension is shown, and a dynamic test is carried out, and each time t is obtained by measuring the displacement, velocity and force sensors i The displacement excitation x(t i ), speed incentive and output force F m (t i ).

[0033] Step 2: The present invention...

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Abstract

The invention discloses a non-destructive evaluation method for nonlinear characteristic parameters of a hydro-pneumatic suspension, comprising the following steps of: based on the establishment of a bench test for the hydro-pneumatic suspension, representing the nonlinear characteristic curve of the hydro-pneumatic suspension by using a small number of discrete points, wherein the values of the other points on the characteristic curve can be obtained by interpolation of these discrete points, so as to represent that the discrete points on the characteristic curve are optimized variables; by taking the squariance of the difference value between calculated power output and tested power output under various moments as a cost function, searching and evaluating based on an optimized method, so that two characteristic curves can be reversely derived integrally through one test. The non-destructive evaluation method has a simple principle, is convenient to operate during the process of testing, strong in practicability, can effectively provide system parameters for designing a hydro-pneumatic suspension system in real time; in particular, the change of the characteristic parameters and the service performance of an in-service hydro-pneumatic suspension system after being manufactured can be evaluated, thereby having good application prospect.

Description

technical field [0001] The invention mainly relates to the technical field of non-destructive testing, in particular to an automatic evaluation method for non-linear stiffness and damping characteristics of an oil-gas suspension in post-manufacturing service based on calculation inversion technology. Background technique [0002] The oil-pneumatic suspension integrates elastic elements and damping elements, has superior nonlinear stiffness characteristics and good nonlinear damping performance, and is widely used in military tracked vehicles and engineering machinery vehicles. Oil-pneumatic suspension is a relatively complex system, and there are many factors that determine its nonlinear stiffness and damping characteristics, which brings great benefits to the accurate testing of nonlinear characteristic curves of displacement-elastic force and velocity-damping force of oil-pneumatic suspension. Difficulties. However, during the production process, the characteristics of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/04G01M5/00
Inventor 刘杰韩旭姜潮白影春
Owner HUNAN UNIV
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