Shock and blast loading of structures is characterized by a very rapid deposition of energy. When acquiring acceleration or pressure measurements from transducers mounted on test structures, it is...

This paper will discuss the sensing technologies that have come together to minimize these offsets. More important, it will document the many other potential contributors to them. Included among these...

Directives to assess and minimize cabin noise have become a top priority for the aerospace industry. From large commercial jets, to helicopters, to small propeller aircraft the need is the same, which...

Piezoresistive (PR) silicon accelerometers with micro-electromechanical systems (MEMS) technology are preferred in many high shock impact measurements. These devices exploit the strength of single...

Rocket motor combustion instability is caused by pressure fluctuations and acoustic resonances in the combustion chamber, which may reduce engine performance, induce structural vibration, and possibly...

Results from pyrotechnic, penetration and metal-to-metal impact field evaluations are presented which prove the performance of a new piezoresistive (PR) shock accelerometer. The microelectromechanical...

Almost all piezoelectric accelerometers in the current market place have a fundamental sensor resonance below 100 KHz. In 1983 Endevco Corporation designed a series of MEMS (Micro Electro- Mechanical...

Exposure to the high vacuum level of a space environment induces material outgassing in ordinary accelerometers and cables. Any substance subjected to a vacuum has the potential to release trapped...

The damage potential of a blast wave is dependent upon both the force it exerts on an object and the duration over which the force is applied. An assessment of this damage potential requires...

This Tech Note provides an introduction to the mechanical environment of pyroshock. Specifically, it (1) defines pyroshock, (2) identifies those situations where pyroshock can induce equipment...

After first clarifying what mechanical shock is and why we measure it, basic requirements are provided for all measurement systems that process transient signals. High- and low-frequency dynamic...

Mechanical shock loads that are imparted to electrical and mechanical systems can degrade the performance of these systems or even induce failure. It is therefore desirable to develop a methodology to...

In 1947 the first piezoelectric accelerometer was designed in the United States1. Within 2-decades, piezoelectric accelerometers with their higher resonant frequencies, signal levels, and amplitude...

No matter how well designed, an instrumentation system can only correctly condition and record signals from transducers if these signals are transmitted with fidelity via the cable interfacing the...

The fluctuating pressures that act on the surfaces of flight vehicles due to propulsion systems and movable surface flows tend to induce oscillatory motions of the fuselage surfaces. These vibrations...