A Practical Adaptive Sinusoidal Vibration Control Strategy for Electro …
Background The electro-hydraulic shake table (EHST) is an essential equipment for vibration tests. When performing sinusoidal vibration excitation, the acceleration response suffers from amplitude attenuation, phase delay, and harmonic distortion, which reduces the accuracy of the vibration test. Purpose The filtered-x least mean square (FxLMS) …
A Practical Adaptive Sinusoidal Vibration Control Strategy for Electro …
Background The electro-hydraulic shake table (EHST) is an essential equipment for vibration tests. When performing sinusoidal vibration excitation, the acceleration response suffers from amplitude attenuation, phase delay, and harmonic distortion, which reduces the accuracy of the vibration test. Purpose The filtered-x least …
Earthquake Simulators
ELECTRO-MECHANICAL – SHAKETABLE 250 KG ELECTRO-MECHANICAL SHAKE TABLE WITH 250 KG CAPACITY "Crystal clear data recording PRODUCT CATALOGUE REQUEST A DEMO This product is designed for larger scale tests than market standard Desktop Shaketable. It can replay recorded earthquakes, apply predefined waveforms …
Continuous Swept-Sine Vibration Realization Combining
Background Electro-hydraulic shake table, also known as vibration simulator, is a kind of important rig for reliability tests. However, the realization of continuous swept-sine vibration signal ...
Shake Table Test on Laboratory Model – (G+1)
shake table shown in Fig 2.1. Fig. 1.2. Electro-dynamic 30Kg-f shake table. Where, 1= Control Panel of Shake Table 2= Fly Wheel 3= Mounting Table The models are tested on the 30 kg-f shake table for this study but in laboratory there are again two different shake table. One is 50 kg-f shake table and another one is 5000 kg-f shake table.
Three-state Feedback Control of Electro-hydraulic Servo Shaking Table
Abstract: In order to improve the control bandwidth of the electro-hydraulic servo shaking table, a three-state control strategy based on state space analysis is proposed in this paper. First, the working principle of electro-hydraulic servo shaking table is introduced. According to the theory of electro-hydraulic servo system, four equations describing the whole …
Offline iterative control method using frequency-splitting …
It has a table size of 15 × 20 m and load capacity of 1200 t. The University of California San Diego (UCSD) runs the world's largest outdoor shaking table. The table size is 7.6 × 12.2 m and the load capacity is about 2000 t. It is a one-dimensional shaking table, and is currently being upgraded for three-dimensional loading.
Mechanical Shakers
Emerson Apparatus offers Mechanical Shakers in three basic configurations: single shaft (Elliptical), two shaft (Vertical), and four shaft (Vertical & Horizontal). Table sizes range …
Real Time Acceleration Tracking of Electro-Hydraulic Shake Tables
Electro-hydraulic shake table (EHST) is vital seismic testing equipment in earthquake engineering for the assessment of structures subject to dynamic vibration excitations. The EHST system can be generally simplified as an electro-hydraulic servo system with prominent acceleration replication requirement. In order to improve the acceleration …
Electric Machinist Table
Mechanics Level 1 3 60 2 Electric Machinist Table: Mechanics Modern Upgrade x1 Modern Upgrade 4 x1 Mechanics Level 1 15 6000 4 Electric Machinist Table: Valve x1 Steel Pipe x4 Steel Plate x4 Steel Gearbox x1 Mechanics Level 1 3 60 4 Electric Machinist Table: Gold Wiring x2 Gold Bar x4 Mechanics Level 1 0.4 120 1 Electric …
Experimental investigation of feedforward inverse control …
Electro-hydraulic shake tables (EHSTs) are indispensable equipments in laboratory for evaluating structural performance subject to vibration environment. A novel feedforward inverse control with disturbance observer strategy is proposed in this paper in order to improve the acceleration tracking performance of the EHST system. The EHST …
Electrodynamic Shaker
A Thermotron electrodynamic shaker has a variety of applications, making it a versatile and highly adaptable piece of equipment. A Thermotron Vibration Shaker can test in a …
Model-based multi-metric control of uniaxial shake tables
A model-based multi-metric shake table control strategy is proposed to improve tracking of the desired acceleration of a uniaxial shake table, remaining robust to nonlinearities including changes in specimen condition. The proposed strategy is verified for the shake table testing of both linear and nonlinear structures.
Investigation on acceleration performance improvement of electro …
DOI: 10.1016/j.isatra.2018.08.010 Corpus ID: 52173922; Investigation on acceleration performance improvement of electro-hydraulic shake tables using parametric feedforward compensator and functional link adaptive controller.
HIGH CAPACITY SHAKE TABLE – QuakeLogic
Servo-Electro-Mechanical Shake Table solutions can be customized in terms of payload capacity, table size, stroke and number of axes. COMPLEMENTARY MEASUREMENT …
(PDF) Shake Table Test on Laboratory Model – …
FFT Analyser. Fig. 1.2. Electro-dynamic 30Kg-f shake table. Where, 1= Control Panel of Shake Table 2= Fly Wheel 3= Mounting Table The models are tested on the 30 kg-f shake table for this study but in laboratory …
Experimental Study on Small-Scale Shake Table Testing of …
For this study, an electro-hydraulic servo-controlled shaking table was employed, with a table surface measuring 1.2 m long and 1.2 m wide. The maximum payload capacity of the shaking table is 1000 kg. ... This paper conducts small-scale shake table testing on both ordinary single-layer spherical latticed shell (ordinary SLS) and …
Development and application of a shaking table system
The shaking table is an important test equipment for studying the seismic resistance of structures. Its vibration form has developed from single-axis single-degree-of-freedom to three-direction six-degree-of-freedom, and the control algorithm has undergone a development process from traditional control to intelligent algorithm control. Investigation …
Shake Tables—What They Are & How They Help Structural Engineers
Beneath the table are mechanical devices called actuators that work together to simulate an earthquake. Typically, two actuators shake the table along the X axis, two shake the table along the Y axis, and four shake the tables vertically along the Z axis. The tables can also rotate independently along each of these three axes.
Tracking Differentiator-based Linear Active Disturbance …
Real-Time hybrid simulation (RTHS) is an important method to study the seismic resistance of medium and large equipment structures. The delay of waves reproduction for earthquake simulation shaking table has a negative effect on the stability and accuracy of RTHS. In this paper, Linear Active Disturbance Rejection Control (LADRC) is used to reduce the time …
Investigation on acceleration performance improvement of electro …
Currently, shake tables are classified into two categories, i.e. the electrodynamic shake table and the electro-hydraulic shake table (EHST). In contrast to the electrodynamic type, the electro-hydraulically actuated shake tables are by far the most preferred testing equipments when fast response and large actuating force are …
Understanding the Physics of Electrodynamic Shaker …
This article will discuss a basic electromechanical shaker model, how to determine Maximum Drive performance for sinusoidal testing, the merits of pneu-matic load …
Continuous Swept-Sine Vibration Realization
Electro-hydraulic shake table, also known as vibration simulator, is a kind of important rig for reliability tests. However, the realization of continuous swept-sine vibration signal with electro-hydraulic shake table is still imperfect due to nonlinearities, uncertainties of the electro-hydraulic servo system, time-varying dynamics and unexpected disturbance. An …
Investigation on acceleration performance improvement of electro …
Electro-hydraulic shake table (EHST), also known as earthquake simulator, is of considerable significance in civil engineering for evaluating structures or infrastructures subjected to earthquake ground motions. However, reproduction of prescribed accelerations at table for EHST systems remains to b …
Optimal Design and Hybrid Control for the Electro-Hydraulic …
The electro-hydraulic earthquake simulation shaking table is the most important piece of equipment for replicating actual earthquake vibration environments, and can be used for the earthquake resistance test in the field of civil and architectural engineering [].For the large-span structures, such as bridges, dams, railways and pipelines, etc., the shaking tables …
SMALL-SCALE SHAKE TABLES | TDG
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QUAKELOGIC INSTRUMENTATION SOLUTIONS
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Electrodynamic Shaker Systems | Vibration Equipment
8 rowsAs a leading manufacturer of electrodynamic shaker systems, Unholtz Dickie offers more than 85 shaker system configurations to cover any test application.
What Makes Shake Tables so Popular?
For some twenty years, Quanser Shake Tables are helping civil engineering students grasp complex concepts of structural dynamics and earthquake engineering more quickly and thoroughly. Engaging, hands-on experiments allow them to leap past dry theory and 'experience' an earthquake in safety of the lab. Inspired by Dr. …
Shaker Systems & Vibration Testing Solutions | Data Physics
SignalForce Products Comprise Turn-Key Vibration Test Systems that Include: Electrodynamic Shakers (both Air- and Water-Cooled), Power Amplifiers, Slip Tables, …