Delta 50-820 User Manual download pdf (Page 11)

Mueller, Ziemer, Hofer, Wirz, O’Donnell 11

Survey of Micro-Thrust Propulsion Options

Cube Sat - 5’th Annual Developers Workshop 2008

Application:

•

Application mostly for attitude control of

conventional to microsats (Dawgstar thruster).

•

Use as main engine is possible in a continuously

pulsed fashion, but may pose life issues for

electrodes.

•

Inherently pulsed operation may induced jitter on

flexible structures.

•

Contamination concerns related to Teflon propellant

largely refuted on EO-1 mission, but need to be re-

evaluated for each mission for extensive firings near

sensitive surfaces (optics).

> 1 kg S/C attitude control

Description:

Status:

•

Thrust generated through ablation of a solid Teflon fuel

bar in an arc discharge across its face.

•

Plasma generated in arc discharge is accelerated

between two electrodes by electrodynamic

forces

through interaction of self-generated magnetic field and

current.

•

Teflon fuel bar is spring-loaded and brought into

position for next firing.

•

Thruster is inherently pulsed, and modular -

carrying its

own fuel.

TRL 9. Flight proven on EO-1 and FalconSAT

III

•

The EO-1 thruster has flown on NM EO-1.

•

The Busek MPACS MicroPPT

has flown on Air Force

Academy’s FalconSAT

III (2007)

•

Smaller “Dawgstar”

version was under development

for a university nanosat.

Aerojet “Dawgstar”

PPT

Busek 3-axis

MicroPPT

(MPACS)

Supplier Designation Mass (kg) Fuel (kg) Isp (sec) Ibit (microNs) Impulse (Ns) Rep Rate (Hz) Power (W) Efficiency

Aerojet EO-1 4.95 0.7 650-1400 90-860 460 single - 1 70 (1 Hz) 8%

Aerojet Dawgstar 4.1 0.6 625 66 3000 3%

Busek MPACS 830 80 16%

Pulsed Plasma Thrusters (PPTs)

FalconSAT

III

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Comments to this Manuals

No comments

Delta 50-820 User Manual Page 11

Comments to this Manuals

Related products and manuals for Dust covers Delta 50-820