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A stiffness control method for a two-degree-of-freedom dual electro-hydraulic shaking table array simulation system

A simulation system, stiffness control technology, applied in electric controllers, controllers with specific characteristics, vibration testing, etc., can solve the problems of lack of effective use of redundant force, inability to improve the stiffness of the array simulation system, etc., to increase the system The effect of stiffness

Active Publication Date: 2020-10-02
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

The existing control method for the redundant drive system is to eliminate the redundant force, lack of effective use of the redundant force, and cannot improve the stiffness of the array simulation system

Method used

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  • A stiffness control method for a two-degree-of-freedom dual electro-hydraulic shaking table array simulation system
  • A stiffness control method for a two-degree-of-freedom dual electro-hydraulic shaking table array simulation system
  • A stiffness control method for a two-degree-of-freedom dual electro-hydraulic shaking table array simulation system

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings. Such as Figure 1-4 As shown, a stiffness control method of a two-degree-of-freedom dual-electro-hydraulic shaking table array simulation system, the two-degree-of-freedom dual-electro-hydraulic shaking table array simulation system includes a lower platform 19, a six-degree-of-freedom shaking table, a two-freedom Shaking table, pier A14, pier B15 and bridge plate 16.

[0045] The six-degree-of-freedom vibration table includes three horizontal valve-controlled cylinder mechanisms, three vertical valve-controlled cylinder mechanisms, an upper platform B18 and three reaction walls, and the three horizontal valve-controlled cylinder mechanisms are respectively No. 5 valve-controlled cylinder mechanism 5, No. 6 valve-controlled cylinder mechanism 6 and No. 7 valve-controlled cylinder mechanism 7, the three vertical valve-controlled cylinder mechanisms are respectively No. 8...

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Abstract

The invention discloses a stiffness control method of a two-degree of freedom dual-electro-hydraulic vibration table array simulation system. The stiffness control method comprises following steps of:calculating a degree of freedom decomposition matrix Hf and calculating a module output signal x0; calculating a two-degree of freedom gesture feedback signal y of an array simulation system; calculating a stiffness compensation signal s; using the stiffness compensation signal s as an input signal of a PID controller, wherein and output signal of the PID controller is a compensation signal xd ofa valve-controlled cylinder mechanism; performing subtraction on the signal x0 and the signal xd so as to obtain a deviation signal xa of the valve-controlled cylinder mechanism, using xa as an inputsignal of ten valve-controlled cylinder mechanism, and driving the two-degree of freedom dual-electro-hydraulic vibration table array simulation system to move. Redundant force of the ten valve-controlled cylinder mechanisms is controlled reasonably, so as to increase an off-diagonal element value and increase system stiffness. When oil supply pressure of a hydraulic source is 21MPa, maximums ofkRxRy and kRyRx in the stiffness matrix can be increased by 21% and 7% respectively.

Description

technical field [0001] The invention relates to a two-degree-of-freedom dual electro-hydraulic vibration table array simulation system, in particular to a stiffness control method of the two-freedom dual electro-hydraulic vibration table array simulation system. Background technique [0002] Electro-hydraulic vibration table is an important equipment for vibration environment simulation, widely used in aerospace, automobile, ship, bridge and civil engineering construction and other fields. With the development of science and technology, the structural size of the test piece is getting larger and larger. It is difficult to achieve the specified motion state to simulate the real vibration environment in the vibration simulation experiment of a single shaking table. The shaking table array simulation system consists of two or more shaking tables, which creates the necessary conditions for the vibration simulation test of long-span structural specimens. [0003] Most of the ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B11/42G01M7/02
Inventor 关广丰徐显桩熊伟王海涛马文琦
Owner DALIAN MARITIME UNIVERSITY
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