Tech Exchange

Self-Healing Slide Ring Material Paint

A slide ring material (SRM) paint is able to heal a majority of surface scratches by itself. When disturbed by minor abrasions, the paint’s cross-linked molecules retain mobility, and the oleophilic polyrotaxane coating redistributes its tension to slide back into place along the polymer chains, erasing the blemish.

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Electronic Device for Damping Impacts

Springs, polymers, and pneumatic or hydraulic devices react to impacts, but a recently developed damping technology calculates and controls the forces that should be applied. Within the device, two electromagnets with different polarities are put in contact, and the repulsion force is used against the forces generated by contact. A specialized micro-controlled circuit connected to special sensors calculates, in real time, the appropriate level of magnetic field strength, in order to dampen the received impact, whose intensity of force can be contained in a wide variation field.

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Volume-Changing Primary Glass Material

This technology produces a silica glass material with a promising negative refractive index. The material changes volume via irradiation under UV light, and results in a refractive index capability of 10-2. This makes it applicable to a wide range of fields, including holograms, optical memory, digital recording, and others. The glass has a composition of GeO2— SiO2, and has a content of 0.5 to 90 mol% of GeO2. The resulting form is a thin film that is produced via the high-frequency sputtering method in an argon atmosphere or argon-oxygen mixed atmosphere with an oxygen content of a maximum of 20 vol%.

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Innovative Aluminum Flat Solar Collector

The most important feature of this solar collector is the technical solution where the heat-absorbing surface is the same as the heat-transferring surface, which results in the highest heat performance and efficiency. There is no mediatory unit between the heat-transferring surface of the absorber and the heating agent. That means no galvanic corrosion, which would work as insulation. The main unit of this system is the hot-pressed and uniquely alloyed aluminum plate profile, designed especially for this purpose. In the profile, shallow channels for liquid are formed and they are fastened to each other in parallel at a certain distance. The tips of the profiles are led in to the distributing or collecting pipes supplying them with an ideal capacity of 1.7 liters and the two necessary inputs and outputs.

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Preflight Determination of Passengers' Weight in Civil Aviation

This system and method provide accurate determination of a passenger’s weight to an airline prior to flight. This allows for fuel consumption saving, increases revenues of freight loading, and improves crew and aircraft performance in diverse emergencies. The system processes passengers’ weight prior to flight to control their sitting distribution/location and determine the desired center of gravity.

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High-Temperature, Ceramics-Based Composite Material

This invention is a manufacturing process of a high-temperature, ceramics-based composite material that features excellent heat and oxidation resistance and frictional properties. The composite material is a dense SiC-infiltrated composite material, a dense carbon-fiber-reinforced SiC-infiltrated composite material, or a dense SiC-infiltrated composite material with granular carbon dispersed. The material is made by infiltrating molten carbon-silicide of Mo or a eutectic mixture of carbon-silicide and silicon carbide into a silicon-carbide-based preform, and then cooling and solidifying the melt.

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Multi-Vector Electronic Control of an AC Motor Drive Reduces Torque Ripple

By suppressing or controlling harmonic currents and voltages of the motor to overcome torque ripple, this system improves the efficiency and torque performance of an AC motor, especially permanent magnet synchronous motors (PMSM). Many PMSMs use a concentrated winding, and they have large spatial harmonics. PMSMs are controlled by conventional vector control drives, but voltages and current harmonics present in the motor can deteriorate accuracy and efficiency. This technique further improves efficiency and torque performance by reducing the harmonics. This technique can be used in many types of equipment, including trucks and other vehicles, air conditioners, machine tools, robotics, and industrial equipment where quick response and accuracy in speed or position control are required.

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