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A Stall Prevention and Recovery System For Airplanes

   Under stall conditions, some airplane control surfaces suffer from decreased or reversed sensitivity, making it difficult for typical control schemes to recover from the stall.  UCI inventors have developed a novel roll mechanism, derived from geometric nonlinear control theory, which allows for pilot roll control and prevents unintentional roll motion resulting from the stall.

Dynamic Statistical Contingency Fuel

Airlines rely on flight dispatchers to perform the duty of fuel planning. In addition to required fuel loading categories, flight dispatchers also uplift contingency fuel to be on the aircraft to hedge against various uncertainties (e.g. weather uncertainty, traffic congestion uncertainty, air traffic control uncertainty etc.) to ensure flight safety and reduce the risk of diversions. To provide consistent and objective fuel planning, some airline Flight Planning System (FPS) provides recommended contingency fuel numbers for dispatchers based on a statistical analysis of historical fuel consumption for similar flights. This recommended contingency fuel is called statistical contingency fuel (SCF). However, due to limitations of the current SCF estimation approach, the application of SCF is limited. Researchers at the University of California, Berkeley have developed a novel methodology based on quantile regression models to overcome the limitations of the current SCF estimation approach. The proposed method takes various factors such as weather, aircraft type, airport, and historical operational conditions into account so that SCF can be estimated in a dynamic, flexible, and more accurate way. Their results have shown that dynamic SCF performs much better than the current SCF estimated by airline FPS and also more sensitive to the specific conditions faced by a given flight. SCF calculated using this novel method will be higher under adverse weather conditions, whereas the current method for determining SCF does not take these conditions into account. The result of using this novel SCF is expected to reduce fuel loading, since dispatchers typically ignore SCF based on the current method when conditions are poor, instead simply loading a very large amount of contingency fuel. By reducing fuel loading, not only would a plan be able to take off sooner, but this would also result in reduced fuel consumption as the aircraft’s weight would be reduced.

High-Efficiency Ion Source

UCLA researchers in the Department of Mechanical and Aerospace Engineering have developed a miniature direct-current (DC) ion source with the higher power efficiencies and lower erosion rates needed for space propulsion applications.

Efficient UAV Flight Mechanism with Vertical Take-Off and Landing (VTOL) Capability

Researchers at the University of California, Davis have developed a new flight mechanism that offers vertical take-off and landing (VTOL) capability and cruising speeds comparable with fixed wing unmanned aerial vehicles (UAV).

Sub-Carrier Successive-Approximation Mm-Wave Radar For High-Resolution 3D Imaging

UCLA researchers in the Department of Electrical Engineering have developed a sub-carrier successive approximation radar (SAR) system with a sufficiently high accuracy to capture three-dimensional images of objects concealed either under the clothing of a person, or within small packages. 

Evaporation-Based Method For Manufacturing And Recycling Of Metal Matrix Nanocomposites

UCLA researchers in the Department of Mechanical and Aerospace Engineering have developed a new method to manufacture and recycle metal matrix nanocomposites.

Methods of Self-Calibration for Coriolis Vibratory Gyroscopes

The levels of long-term instabilities in bias and scale factor are key characteristics for the utilization of gyroscopes in many practical applications in navigation, positioning, and targeting systems. The inventors at UCI have developed two methods for gyroscope calibration: 1) Utilizing the mechanical quadrature error and 2) Utilizing the voltages of amplitude gain control (AGC) of the drive-mode. The new methods have been combined with feedback signals from a third technique, Side-Band Ratio (SBR) detection, to produce bias stability of 0.1 deg/hr after 300 seconds that is maintained for over 3 hours.

Micromachined Gyroscopes with Two Degrees of Freedom Sense-Mode Oscillator

The invention relates to the field of micromachined gyroscopes, and in particular to inertial micromachined transducers for measurement of angular rotation rate of an object. A three-degrees of freedom (DOF) MEMS inertial micromachined gyroscope with nonresonant actuation with a drive direction, sense direction and a direction perpendicular to the drive and sense directions comprises a planar substrate, a 2-DOF sense-mode oscillator coupled to the substrate operated at a flattened wide-bandwidth frequency region, and a 1-DOF drive mode oscillator coupled operated at resonance in the flattened wide-bandwidth frequency region to achieve large drive-mode amplitudes.

Synthesis Technique to Achieve High-Anisotropy FeNi

Researchers at the University of California, Davis have developed an innovative synthesis approach to achieve high anisotropy L1 FeNi by combining physical vapor deposition and a high speed rapid thermal annealing (RTA).

Micro-Glassblown 3-D Coriolis Vibratory MEMS Gyroscope

Micro-glassblowing batch fabrication process for 3-D MEMS gyroscope

Enhancing Mechanical Properties of Nanostructured Materials with Interfacial Films

Nanostructured materials are a category of materials comprised of nanometer-scale crystals which exhibit order of magnitude higher strength when compared to their traditional counterparts with larger crystal sizes. The application of nanostructured materials has been limited due to seemingly inherent low ductility and high-temperature instability. The inventors at UCI have developed a nanostructured material that simultaneously exhibits increased ductility, strength, and thermal stability by the incorporation of amorphous intergranular films.

Supersonic Thrust Vector Control for Jet Engines Using Staggered Flaps

Researchers at the University of California, Davis have developed a novel mechanism for vectoring the thrust of supersonic, air-breathing jet engines for aircraft applications.

A Low-Profile Flow Shear Sensing Unit

UCLA researchers have developed an accurate low-profile shear sensing unit that is viable for both gas and liquid flows.

Modular Rod-Centered, Distributed Actuation & Control Architecture For Spherical Tensegrity Robots

The potential for robots to perform complicated tasks in highly dynamic environments, could be challenging for robots with rigid bodies. Accordingly, the emerging field of soft robotics is exploring tensegrity structures – which are isolated solid rods connected by tensile cables. These tensegrity structures are highly flexible, and that makes them suitable for uneven and unpredictable environments in which traditional robots struggle.Researchers at the University of California, Berkeley have developed novel methods to position all the required components for tensegrity robots to be fully functional and protected while being transported. This technology keeps the actuators, as well as other electronics components, protected from impact forces, while successfully providing the actuation necessary for locomotion. 

Methods for Fabrication of Electric Propulsion Tips

The technology is a method for fabrication of silicon microfabricated emitter tips.This process has two-step etching process which utilizes field emission electric propulsion (FEEP) and indium propellant.

Angularly Unbounded Three-Axes Spacecraft Simulator

Satellite rotational dynamics on a three-degrees of freedom (DOF) spacecraft simulator has always been limited by the maximum angle of rotation allowed by the spherical air bearing. All three-axes spacecraft simulators developed so far allow only ~10-50 degrees of rotation along pitch and roll axes and 360 degrees along the yaw axis. This limits the effectiveness of the experimental validation of spacecraft dynamics. For instance, large angle maneuvers or de-tumbling cannot be fully tested using a standard spacecraft simulator. Eliminating the limitation on the maximum rotation angle can allow for a complete ground testing of the spacecraft attitude determination and control technique. 

Hypersonic Laminar Flow Control Using Strategic Surface Patterning

Dr. Xiaolin Zhong and colleagues in the UCLA Department of Mechanical and Aerospace Engineering have developed a method of maintaining laminar flows over air transportation vehicles and space reentry vehicles at high supersonic and hypersonic speeds by strategically applying surface roughness.

Inorganic Aqueous Solution (IAS) for Phase-Change Heat Transfer Medium

UCLA researchers in the Department of Mechanical and Aerospace Engineering have invented a novel inorganic aqueous solution (IAS) that can be used with aluminum (Al) heat pipes for lightweight and space electronic cooling applications.

High-Strength Wind Turbine Blades and Wings

UCLA researchers in the Department of Mechanical and Aerospace Engineering have developed a novel biplane blade configuration that optimizes aero-structural performance for wind turbine blades and other airfoil applications.

Quiet Bleed Valve For Gas Turbine Engine

The present invention relates noise reduction for gas turbine engines. Significant noise comes from high-pressure and intermediate-pressure bleed valves that relieve pressure from the compressor. The proposed solution reduces noise through innovative designs of the valve muffler and the valve support structure.

Three-Dimensional Wafer-Scale Batch-Micromachined Angle/Angular Rate Microshell Resonator Gyroscope

A novel design and fabrication methods of three-dimensional, wafer-scale, batch-fabricated angle/angular rate micro-shell resonator gyroscope with on-chip actuation and detection.

Diamonoid Stabilized Fine-Grained Metals

This invention relates to stabilized and strengthened metals and, more specifically, to metals stabilized and strengthened, especially at high temperatures, by the addition of diamondoid. Recent evidence has indicated that such nanocrystalline alloys may provide mechanical and electrical properties superior to those of their coarse-grained counterparts.

Suppression of Jet Noise from Aircraft

Brief description not available

Applications of Photonic Crystals with Degenerate Spectral Band Edge

In a vacuum, light propagates with a constant velocity, while in an optically transparent non-dispersive media, the speed of light propagation can be different. At optical frequencies, the refractive index of transparent materials usually does not exceed several units, and the speed of light propagation is of the same order of magnitude as the speed of light in vacuum.The situation can change dramatically in strongly dispersive media. Although the phase velocity of light is still determined by the same mathematical expression, the speed of electromagnetic pulse propagation is now different and is determined by the group velocity which is one of the most important electromagnetic characteristics of the medium. With certain reservations, the group velocity coincides with the electromagnetic energy velocity and is usually referred to simply as the propagation speed of light in the medium.Strong dispersion means that the group velocity strongly depends on the frequency. In the slow light case, the electromagnetic pulse propagates through the dispersive medium at a speed, regardless of the respective value of the phase velocity. In some cases, it can even turn virtually to zero, which implies that the electromagnetic wave at the respective frequency does not transfer the energy.Slow and ultraslow light can have numerous and diverse practical applications. These phenomena can be associated with dramatic enhancement of nonlinear effects (higher harmonic generation, wave mixing, etc.), magnetic Faraday rotation, and many other important electromagnetic properties of the light-conducting medium. Such an enhancement can facilitate design of controllable optical delay lines, phase shifters, miniature and efficient optical amplifiers and lasers, etc. In addition, ultraslow light might allow nonlinear interactions down to a single photon level.

Photonic Devices Having Degenerate or Split Spectral Band Edges

The manipulation of electromagnetic energy can be advantageous to numerous applications within many industries. For instance, much effort has been focused on reducing the velocity of electromagnetic energy, such as light and microwave pulses. The reduced velocity of electromagnetic energy can facilitate manipulation of electromagnetic waves. It can also enhance the light-matter interaction essential in numerous optical and microwave applications. One common photonic device exploiting spatial inhomogeneity is a photonic crystal. This device is typically composed of multiple repeating segments (unit cells) arranged in a periodic manner. The electromagnetic frequency spectrum of a typical photonic crystal develops frequency bands separated by forbidden frequency gaps. The frequency separating a photonic band from adjacent photonic gap is referred to as a (photonic) band edge, or simply a band edge. One common drawback of current photonic devices employing spatial inhomogeneity is that only a small fraction of the incident electromagnetic radiation is converted into the slow electromagnetic mode, resulting in low efficiency of the device. Another common drawback of current photonic devices is the necessity to employ a large number of the said segments (unit cells) in order to achieve a desirable slowdown of electromagnetic energy. Accordingly, improved photonic devices are needed having smaller dimensions and allowing for more efficient manipulation of the incident electromagnetic radiation.

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