The Quanser Shake Table II is a mid-size open-architecture single-axis earthquake simulator ideal for teaching structural dynamics, vibration isolation, feedback control, and other control topics related to earthquake, aerospace and mechanical engineering. Users can generate sinusoidal, chip as well as pre-loaded acceleration profiles of real earthquakes, such as Northridge, Kobe and El-Centro, to study their effects on buildings, bridges and various materials. Additionally, earthquake profiles can be downloaded from the PEER Ground Motion Database, scaled using the supplied software, and replayed on the Shake Table II.
Shake Table II
The Shake Table II consists of a top stage driven by a powerful motor that allows it to achieve an acceleration of 2.5 g when loaded with a 7.5 kg mass. The stage has a travel of 15.2 cm and rides on two ground-hardened metal shafts using linear bearings, which allows for smooth linear motion with low path deflection. The Shake Table’s motor is a 400W high-powered 3-phase brushless DC actuator. The motor contains an embedded high-resolution encoder that allows the position of the stage to be measured with an effective linear resolution of 1.55 μm. An analog accelerometer mounted on the Shake Table II platform measures the acceleration of the stage directly.