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Rigidity control method of six-degree-of-freedom dual-electro-hydraulic vibrostand array simulation system

A simulation system and stiffness control technology, applied in vibration testing, machine/structural component testing, measuring devices, etc., can solve problems such as the inability to improve the stiffness of the array simulation system, lack of effective use of redundant forces, etc., to achieve increased element value, the effect of increasing the stiffness of the system

Active Publication Date: 2019-05-28
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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  • Rigidity control method of six-degree-of-freedom dual-electro-hydraulic vibrostand array simulation system
  • Rigidity control method of six-degree-of-freedom dual-electro-hydraulic vibrostand array simulation system
  • Rigidity control method of six-degree-of-freedom dual-electro-hydraulic vibrostand array simulation system

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Embodiment Construction

[0043] 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 six-degree-of-freedom dual electro-hydraulic vibration table array simulation system, the described six-degree-of-freedom dual electro-hydraulic vibration table array vibration platform includes: a lower platform 19, a bridge pier A14, a bridge pier B15, and a bridge plate 16 , upper platform A17, upper platform B18, three horizontal valve control cylinder mechanisms, seven vertical valve control cylinder mechanisms, and three reaction walls. The three horizontal valve control cylinder mechanisms are No. 5 valve control cylinder mechanisms respectively. Cylinder mechanism No. 5 and No. 6 valve-controlled cylinder mechanism 6 and No. 7 valve-controlled cylinder mechanism 7. The seven vertical valve-controlled cylinder mechanisms are respectively No. 1 valve-controlled cylinder mechanism 1 and No. 2 valve-contro...

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Abstract

The invention discloses a rigidity control method of a six-degree-of-freedom dual-electro-hydraulic vibrostand array simulation system. The method comprises the following steps of building an O-XYZ coordinate system with a geometric center O of a bridge plate, and calculating driving signals x0 of valve-controlled cylinder mechanisms; calculating array simulation system six-degree-of-freedom posefeedback signals y; calculating rigidity compensation signals s; regarding the rigidity compensation signals s as input signals of a PID controller, and regarding output signals of the PID controlleras compensation signals xd of the valve-controlled cylinder mechanisms; making difference between the signals xo and the signals xd to obtain deviation signals xa of the valve-controlled cylinder mechanisms, and driving the six-degree-of-freedom dual-electro-hydraulic vibrostand array simulation system to move. According to the method, by reasonably controlling the redundant force in the 10 valve-controlled cylinder mechanisms, k61 element values in a rigidity matrix can be increased, and the system rigidity is improved. When the oil supply pressure of a hydraulic source is 21 MPa, the maximumvalue of kRzDx in the rigidity matrix can be increased by 7% by means of the control method.

Description

technical field [0001] The invention relates to a six-degree-of-freedom dual electro-hydraulic vibrating table, in particular to a stiffness control method for a simulation system of a six-degree-of-freedom dual electro-hydraulic vibrating table. 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 array simulation s...

Claims

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Application Information

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IPC IPC(8): G01M7/06
Inventor 关广丰徐显桩熊伟王海涛马文琦
Owner DALIAN MARITIME UNIVERSITY
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