Over the past decade synthetic jets have emerged as a promising means of active flow control. They have the ability to introduce small amounts of energy locally to achieve non-local changes in the flow field. These devices have the potential of saving millions of dollars by increasing the efficiency and simplifying fluid related systems. A synthetic jet actuator consists of a cavity with an osc...

Three circular piezoelectric actuators: Bimorph, Thunder, and Radial Field Diaphragm (RFD) function as oscillating diaphragms within a cavity to produce a zero net mass flux air jet. To characterize each diaphragm, displacement response and vibrational characteristics with varying mechanical and electrical boundary conditions were investigated using a saw tooth waveform at 5 Hz. Clamping pressu...

The stability of inkjet printers is a major requirement for high-quality-printing. However, in piezo-driven inkjet printheads, air entrapment can lead to malfunctioning of the jet formation. The piezoactuator is employed to actively monitor the channel acoustics and to identify distortions at an early stage. Modifications of the response of the piezoactuator indicate entrapped air bubbles and t...

The search for present or past life in the Universe is one of the most important objectives of NASA’s exploration missions. Drills for subsurface sampling of rocks, ice and permafrost are an essential tool for astrobiology studies on other planets. Increasingly, it is recognized that drilling via a combination of rotation and hammering offers an efficient and effective rapid penetration mechani...

A low-cost laser detection system based on coherence has been developed and is able to detect weak, continuous sources even against bright background light. The composed of a Mach–Zehnder interferometer with one arm modified piezo-mounted mirror modulate the path length. We introduce methods determine wavelength extend horizontal field view detector. To widen view, cone added while additional u...

This paper is a thorough review of innovative architectures electro-hydraulic servovalves that exploit actuation systems based on piezo-electric materials. The use commercially available actuators, namely, piezo stacks, amplified rectangular benders, and ring very promising for the main stages pilot given fast response low weight piezoelectric these actuators can also allow novel designs to be ...