摘要:
A geostationary platform is held afloat by a superpressure balloon. A suitable altitude is 25 km. The craft carries electrohydrodynamic thrusters, to overcome winds, held within a scaffold. Sensors determine position, velocity, acceleration and vector. A CPU performs instructions for station-keeping or navigation. A communication system is included to, inter alia, receive instructions from the ground. The craft carries a payload for observation and transmission, cradled in a temperature-controlled chamber. Power to the platform is transmitted in the form of electromagnetic waves (with suitable frequencies including microwaves of 2.45 GHz or 5.8 GHz) from a ground-based transmitter to a receiving antenna on, or affixed to, the balloon which converts the electromagnetic energy to direct current. A step-up voltage converter increases the voltage as required. A ground station monitors craft position and operational efficiency by radar to help ensure safe takeoff, operation, and landing of the craft.
摘要:
A honeycomb sandwich structure comprises a main body portion having a first skin material (1), a second skin material (2), and a honeycomb core (5) sandwiched between the first skin material (1) and the second skin material (2), and a thermoelectric conversion module (3) that generates power using a temperature difference between a high temperature side module front surface (3a) and a low temperature side module rear surface (3b). The thermoelectric conversion module (3) is embedded in a main body portion such that at least one of the module front surface (3a) and the module rear surface (3b) is in a state being exposed from the main body portion, and as a result, a temperature difference is generated between the module front surface and the module rear surface.
摘要:
A method and a system for reducing mechanical disturbances from energy storage flywheels (32) in an electrically-powered vehicle are provided. The system includes at least two counter-rotating energy storage flywheels (32) arranged on the vehicle; vehicle dynamics, control, and sensors for sensing a disturbance to the vehicle and providing an output indicative of the disturbance. The system also provides for adjustably controlling an attitude of the vehicle in response to the output of the sensors and to counteract disturbances resulting from the at least two counter-rotating energy storage flywheels (32). A method for reducing mechanical disturbances from energy storage flywheels arranged in an electrically powered vehicle is also provided. The method has the steps of: sensing a torque on the vehicle to provide a torque measurement; processing the torque measurement to produce a control signal based upon the sensed torque; and modifying a relative speed or orientation of the energy storage flywheels by using the control signal to reduce a net torque produced by the flywheels. A flywheel-powered electric vehicle system is also provided. The system includes an electrical power subsystem arranged on a vehicle structure; a pair of counter-rotating energy storage flywheels (32) mounted to a flywheel mounting plate, the pair of flywheels connected to the electrical power subsystem. Torque sensors are arranged between the flywheel mounting plate and the vehicle structure for sensing a net torque on the vehicle resulting from the pair of flywheels and generating a torque signal indicative thereof. A vehicle attitude sensor is arranged on the vehicle structure to produce an attitude signal. A vehicle attitude actuator and electronic processing equipment are arranged on the vehicle structure and connected to the pair of counter-rotating energy storage flywheels (32), the torque sensors, the vehicle attitude sensor, the vehicle attitude actuator, and the electrical power subsystem. The electronic processing equipment processes the attitude signal and the torque signal to provide a control signal to the vehicle attitude actuator for reducing the net torque on the vehicle.
摘要:
The invention relates to a surface tension storage tank comprising a liquid outlet from where the liquid can be expelled under the action of a pressurant gas. A collector device issues into a chamber of a tubular device which also comprises a draining conduit opening at one end at the bottom of said chamber, the other end being situated higher than the first when the tank is being filled. On the side opposite its bottom, the chamber is situated close to the liquid-expelling orifice from which it is separated by an outlet gas barrier. Gas barriers are also provided at the other end of the conduit and on the level of the junction of the collector device with the said chamber.
摘要:
Le réservoir (10) comporte un orifice de sortie (12) d'où le liquide peut être extrait sous l'action d'un gaz de pressurisation. Un dispositif collecteur (15) aboutit dans une chambre (20) d'un dispositif tubulaire comprenant également un conduit (30) s'ouvrant à une extrémité au fond de la chambre et dont l'autre extrémité est située plus haut que la première en position de remplissage. Du côté opposé à son fond, la chambre (20) est située à proximité de l'orifice de sortie (12) dont elle est séparée par une barrière de gaz de sortie. Des barrières de gaz sont prévues aussi à ladite autre extrémité du conduit (30) et au niveau du raccordement du dispositif collecteur (15) avec la chambre (20).
摘要:
A power conversion system (200A) incorporated in a flight vehicle includes a power converter (10) having a semiconductor element stored therein. An energy storage (20) is disposed above the power converter (10) in the vertical direction, the energy storage storing a solid or liquid energy source containing a neutron attenuating material. The power converter (10) is provided with a movable mechanism (60) that moves to shift in position according to a tilt of the flight vehicle. The movable mechanism includes slider rails and a slider movable unit.
摘要:
The present invention relates to a Microwave Electrothermal Thruster(MET) adapted for in-space electrothermal propulsion comprising a tunable frequency Microwave Electrothermal Thruster propulsion module enabling primary propulsion and altitude control of a satellite/spacecraft wherein RF Semiconductors is introduced for the first time as microwave generator inside cavity body to increase its efficiency and respond time and to make the thruster capable of operating in two frequencies by mechanically tuning its cavity making such thruster compact and light weight. The free-floating plasma within the resonant cavity couples the incident electrical power directly to the tangentially injected propellant gas. The plasma forms by focusing the microwave energy into the first transverse magnetic mode and operates independent of the type of propellant gas used. Also, for the first time, Shape Memory Alloy is introduced into the thruster cavity to enable faster and effective tuning of the resonant cavity diameter, when switching between two operational frequencies.