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A control moment gyroscope (CMG) is an attitude control device generally used in spacecraft attitude control systems. A CMG consists of a spinning rotor and one or more motorized gimbals that tilt the rotor’s angular momentum. As the rotor tilts, the changing angular momentum causes a gyroscopic torque that rotates the spacecraft. [ 1 ][ 2 ]
WorldView-4, previously known as GeoEye-2, was a third generation commercial Earth observation satellite launched on 11 November 2016, at 18:30:33 UTC. The spacecraft was operated by DigitalGlobe. With a maximum resolution of 31 cm (12 in), WorldView-4 provided similar imagery as WorldView-3, the highest resolution commercially available at the ...
Zero-propellant maneuvers can be achieved by carefully planning and commanding operations with attitude control devices such as this Control Moment Gyroscope for the International Space Station. A zero-propellant maneuver (ZPM) is an optimal attitude trajectory used to perform spacecraft rotational control without the need to use thrusters ...
There were three control moment gyroscopes on Skylab, but only two were required to maintain pointing. [82] The control and sensor gyroscopes were part of a system that help detect and control the orientation of the station in space. [82] Other sensors that helped with this were a Sun tracker and a star tracker. [82]
A gyroscope flywheel will roll or resist about the output axis depending upon whether the output gimbals are of a free or fixed configuration. An example of some free-output-gimbal devices is the attitude control gyroscopes used to sense or measure the pitch, roll and yaw attitude angles in a spacecraft or aircraft. Animation of a gyro wheel in ...
The National Transportation Safety Board has issued an urgent warning to airlines that fly the Boeing 737, saying a failure first seen on a United Airlines flight in February could cause problems ...
An inertial navigation system (INS; also inertial guidance system, inertial instrument) is a navigation device that uses motion sensors (accelerometers), rotation sensors (gyroscopes) and a computer to continuously calculate by dead reckoning the position, the orientation, and the velocity (direction and speed of movement) of a moving object ...
Honda Motor is recalling 1,693,199 vehicles in the U.S. because of potential steering problems. The steering gearbox worm wheel, which controls steering, may have been manufactured incorrectly in ...