Description: This NASA Phase II SBIR program would fabricate high sensitivity semiconductor nanomembrane 'sensor skins' capable of multi-axis surface pressure characterization on flight test vehicles, wind tunnel models as well as operational aerospace vehicles, using SOI (Silicon on Insulator) NM techniques in combination with our pioneering HybridSil nanocomposite materials. Such low-modulus, conformal nanomembrane sensor skins with integrated interconnect elements and electronic devices can be applied to new or existing wind tunnel models for multi-axis surface pressure analysis, or to lightweight UAVs as part of active flutter control systems. NanoSonic has demonstrated the feasibility of NM transducer materials in such sensor skins for the measurement of dynamic shear stress and normal pressure. Semiconductor NM sensor skins are thin, mechanically and chemically robust materials that may be patterned in two dimensions to create multi-sensor element arrays that can be embedded into small probe tips or conformally attached onto vehicle and model surfaces. Sensors may be connected to external support instrumentation either through thin film and ribbon cable interconnects, or potentially wirelessly using RF communication directly from electronic networks incorporated into the sensor skin material.

Benefits: The anticipated initial market of the NM sensor skin arrays is for flight testing and wind tunnel testing of flow models for NASA flight research centers. An appreciation of the instrumentation issues obtained by working with such centers would allow improvements in sensor materials, electronics and packaging, and potentially allow the transition of related products to operational vehicles. The thin film sensor elements may be used as air flow or water flow devices in systems where either the low weight, low surface profile, lack of need for space below the flow surface, or high sensitivity at a low cost are needed.

Small, unmanned air vehicles large enough to carry the extra load associated with electronics and power, and operationally sophisticated enough to require air data sensors would be a likely first use. Distributed pressure mapping on air vehicles as well as in biomedical devices and other systems may have merit.