Research

We design, prototype, test, and analyze vibroacoustic devices, systems, and techniques
for the applications in  underwater SONAR, biomedical ultrasound, mobility vibrations, and industrial sensors/actuators

Acoustic Wave Propagation Simulation

• 2-D, 3-D wave propagation characteristics in various acoustic media

• Wave propagation simulation with phase-delay techniques

• Acoustic hologram optimization by small-data-driven machine learning

Mechanical Vibration Analysis

• Unmanned Ground Vehicle (UGV) Dynamics

• Vehicle vibration, tire vibration, non-pneumatic tire design, ultrasonic sensor-based navigation

• Composite structure vibration study by finite element analysis: modal, harmonic, and transient analysis

• Piezoelectric resonator modeling and vibration mode characteristics

Acoustic Metastructured Composite Lens Designs

• Acoustic metastructure (holograms) exhibits a microscale 2-D phase delay map

• Acoustic waves through this lens generate precisely shaped wavefronts

• A metastructured-lens facilitates high-precision spatial control of acoustic energy delivery

• Applications: surface processing, multi-focal therapeutic testing, cavitation control

• We develop high-power, high-precision meta-lensed acoustic transducers 

Underwater SONAR Transducers and Assembly

• Broadband transducer designs for both underwater projectors and hydrophones

• Multi-resonance characteristics

• Mode shape-dependent transducer performance

• We develop broadband, high-sensitivity, multi-resonance underwater transducers 

Therapeutic Ultrasound Devices and Techniques

• Deep vein thrombosis (DVT) and Pulmonary embolism (PE): sudden death rate > 25%

• Ultrasound (US) facilitate faster dissolution of blood clot by 1) enhancing agent permeation, 2) mechanical agitation, and 3) combined effects

• Small yet high-power therapeutic ultrasound systems and techniques that hold a precise US beam controllability can overcome the current limitations in DVT and PE treatments 

• We design, simulate, prototype, test in-vitro, and test in-vivo unique US therapy systems for treating thrombo-occlusive diseases