Control system for electric servo cylinder seismic simulating vibration table
A technology of electric servo and earthquake simulation, which is applied in vibration testing, measuring devices, testing of machines/structural components, etc., can solve problems such as poor accuracy of tracking expected waveforms, and achieve the effect of improving the accuracy of waveform reproduction
Active Publication Date: 2018-12-11
ZHEJIANG UNIV +1
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Problems solved by technology
[0005] The purpose of the present invention is to provide a control system for an electric servo cylinder earthquake simulation shaking table to solve the problem that the current electric servo cylinder earthquake simulation shaking table acceleration response waveform tracking accuracy of the expected waveform is poor
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[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0042] Such as figure 1 As shown, it is an electric servo cylinder earthquake simulation vibration table adopted in this embodiment. The vibration table includes a vibration table base 1, a servo motor 2, an electric servo actuator 3, a vibration table surface 5 and a prestressed gapless connection mechanism 8. The vibrating table base 1 is connected to the vibrating table top 5 through the linear guide pair 4, the test piece 9 is placed on the vibrating table top 5, and the servo motor 2 is installed under the vibrating table base 1. The output shaft of the servo motor 2 is connected to the It is connected with the input shaft of the electric servo actuator 3 that converts rotation into linear motion, and the output shaft of the electric servo act...
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The invention discloses a control system for an electric servo cylinder seismic simulating vibration table, which includes an outer loop iterative control subsystem and an inner loop control subsystem. In the k-th iterative test, the outer loop iterative control subsystem generates a k-th outer loop acceleration control command according to an expected acceleration waveform, an acceleration waveform of the vibration table board in the (k-1)th test and a (k-1)th outer loop acceleration control command, the inner loop control subsystem receives the outer loop acceleration control command, and avibration table control command is obtained by adopting an acceleration-displacement dual-parameter control method so as to excite the vibration of the vibration table. The application of the controlsystem can solve a problem that the expected waveform tracking accuracy of acceleration response waveform of the electric servo cylinder seismic simulating vibration table board is poor, and can further improve the accuracy of acceleration waveform reproduction through multiple iteration tests.
Description
technical field [0001] The invention relates to the technical field of automatic control, in particular to an electric servo cylinder earthquake simulation shaking table control system. Background technique [0002] Earthquake is one of the most serious natural disasters, which poses a serious threat to people's life and property, and brings huge losses to human society. my country is located between the circum-Pacific seismic belt and the Eurasian seismic belt. It is one of the countries with the most severe earthquake disasters in the world. Many destructive earthquakes have occurred in history. Especially on July 28, 1976, an earthquake with a magnitude of 7.8 occurred in Tangshan City, Hebei Province, killing nearly 240,000 people; on May 12, 2008, an earthquake with a magnitude of 8.0 occurred in Wenchuan, Sichuan Province, killing nearly 7 Thousands of people died, and the catastrophic consequences of these earthquakes were horrifying. [0003] The basic principle of...
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IPC IPC(8): G01M7/02
CPCG01M7/022
Inventor 孔杰陈积明史治国程鹏钟绵新
Owner ZHEJIANG UNIV