Application Cases

【Overview】
In this study, the Aigtek ATA-2081 high-voltage amplifier was used to build an active-passive hybrid damping system. The active constrained layer damping (ACLD) structure replaces the constraining layer in classical constrained layer damping structures with piezoelectric or other smart materials. By introducing an active control system, the energy dissipation capability of the constrained damping layer is further enhanced. Even when the active control system is turned off or fails, passive damping effects are still maintained. This treatment strategy is essentially an active-passive hybrid damping method, characterized by flexibility, high efficiency, and strong adaptability. Meanwhile, active structural acoustic control technology has matured and serves as an effective supplement to traditional passive noise reduction measures, further improving the airborne sound insulation performance of structures in the low-frequency range.

Experiment Name: Testing of Airborne Sound Insulation and Damping Characteristics of Active Constrained Layer Damping Plates

Experiment Principle:
Based on the "piezoelectric-acoustic-structure" multiphysics coupling theory, utilizing the inverse piezoelectric effect of piezoelectric ceramics and the energy dissipation characteristics of viscoelastic damping layers, an active-passive hybrid damping system was constructed using a velocity negative feedback control strategy. The airborne sound insulation and damping characteristics of the active constrained layer damping plates were investigated.

Experimental Block Diagram:

Experimental Setup Photos:

Experimental Procedure:
First, seven configurations of active constrained layer damping plates with different damping block positions were designed. The ACLD configuration with a central damping block was optimized through numerical simulation, and its sound insulation performance in the passive state was verified. Velocity negative feedback active control was then applied to this configuration, and the control effect was verified experimentally. An edge-enhanced EACLD configuration was subsequently proposed, and its sound insulation characteristics were compared with those of the central configuration. Finally, the contribution mechanism of active-passive hybrid damping and the influence of material parameters such as base plate thickness and stiffness were analyzed.

Application Scenarios:
Building partitions and indoor noise control, rail transit sound insulation and vibration reduction, industrial equipment noise control, optimization of indoor acoustic environments in civil buildings

Advantages of Aigtek Amplifiers in This Application:

1. High voltage output – Precisely meets the mid-to-low frequency velocity negative feedback control requirements, ensuring that the piezoelectric ceramics generate sufficient active control force.

2. Digitally adjustable voltage gain – Supports comparative testing under multiple operating conditions, including central/edge configurations and different material parameters.

3. Low distortion output and high output stability – Ensures accurate evaluation of the active-passive hybrid damping contribution mechanism and validation of the multiphysics coupling model.

Recommended Product: ATA-2000 Series High-Voltage Amplifier

Figure: ATA-2000 Series High-Voltage Amplifier Specifications and Parameters