"We have to rtm the
thrusters for the test, which means it has to be in a vacuum chamber, but we have to make the chamber out of fibre glass because it has to be transparent to radio frequencies," says Wallace.
The most often applied configuration of
thrusters in the propulsion system is shown in fig.
When using the SPMA for high-precision control, because there are a large number of
thrusters integrated in the array and under the condition of
thruster redundancy configuration, allocation method that satisfies (1) is not unique.
Assuming a single
thruster can provide continuous thrust, for fixed
thruster, it can be equivalent by means of pulse width modulation.
Thruster 1: [r.sub.1] = [[0.0 1.0 - 1.0].sup.T], [d.sub.1] = [[0.0 0.0 - 1.0].sup.T]
"With these
thrusters that are still functional after 37 years without use, we will be able to extend the life of the Voyager 1 spacecraft by two to three years," said Suzanne Dodd, project manager for Voyager at NASA's Jet Propulsion Laboratory, Pasadena, California.
Since power available now for propulsion systems is higher, satellites can use high power
thrusters capable of delivering more thrust.
Tees Components, based in North Skelton, has been awarded a contract to supply four of its White Gill
thrusters to be fitted on the major new PS200m research ship called RRS Sir David Attenborough.
A subsequent investigation by the Health and Safety Executive (HSE) found that although TSECL was aware that the tunnel
thruster - a gearbox and propeller used to manoeuvre a ship - was only notionally stable, it did not take sufficient steps to ensure it was safe to work on or near.
When the
thruster does not work, the baffle, under the tension of the spring, blocks the propellant pipeline.