Instead of using conventional flaps to generate torques, we explore the feasibility of applying micromachined sensors and actuators to control leading-edge vortices, and consequently, provide sufficient moments for flight control. By utilizing a “flexible skin” containing 64 micromachined shear stress sensors, instantaneous separation line on the leading edges can be detected. We applied microa...

During the hypersonics activities of the 1960s, thin shock-layer theory was developed as a rst-order correction to Newtonian theory, in the hope of gaining insight into eÆcient lift at very high speeds. The wings are limited to conical geometry, but can have arbitrary transverse camber. Good predictions were made of the forces generated by delta and caret wings, but no optimization studies were...

A new laser velocimetry technique, Doppler global velocimetry, is described. This technique is capable of simultaneously measuring in real time the three components of velocity of an entire particle field i l luminated by a laser l ight sheet . A prototype one-component velocimeter is described along with the signal processing electronics. The system was tested by measuring the velocity field f...

Notch (N) is a receptor for signals that inhibit neural precursor specification [1-6]. As N and its ligand Delta (DI) are expressed homogeneously, other molecules may be differentially expressed or active to permit neural precursor cells to arise intermingled with nonneural cells [7,8]. During Drosophila wing development, the glycosyltransferase encoded by the gene fringe (fng) promotes N signa...

In this paper, the equation of motion of an elastic 2 DoF wing model has been derived using Lagranges method. The aerodynamic loads on the wing were calculated via the Strip-Theory and the effect of compressibility was included. Wing deflections due to bending and twist motions were determined using the Assume-Mode method. The aeroelastic equations were solved numerically using the V-g method. ...