Magnetic Torquer Bars Fully Qualified
www.CayugaAstro.com, 607-319-4794 R140509-01
Largest selection of standard designs70+ standard designs from 1 to 1500 Am2
L Series: Lowest mass & powerS Series: Compact & lowest residual moment33% lighter than competition20% lower power than competition
Superior constructionExperienced assemblers, Superior core materialStandardized component design
Winding Process-Bifilar wound-Controlled wire tension -Zero wire twist-Windings & cover embedded in potting material
Space flight heritage-Cayuga Astronautics’ team have built ~1000 MTBs that have flown in space with 100% success-Six Cayuga Astronautics’ MTBs scheduled to launch in 2015
Magnetic Torquer Bars Fully Qualified
www.CayugaAstro.com, 607-319-4794 R140509-01
MTB-200S-28V
MagnetometerSense Coil
Test Equipment
Two different performance test methods produce similar results
Qualification models built for all new designsMTB qualified to levels higher than typically required Random Vibe: 25 Grms, 3 min/axis (0.5 g2/Hz 50 to 800 Hz)Thermal Vacuum: 8 Cycles -34 to 71 ⁰C
Magnetic performance not affectedby Thermal Vacuum or Random Vibe
Traditional methodMeasure magnetic field to determine moment Jig accurately positions magnetometerScaling determined during core test
Torsional pendulum methodTorque is cross product of magnetic moment of MTB and horizontal component of Earth’s magnetic field
M = (I/B) x (2πf)2
M =Magnetic Moment
I = Rotational Inertia
B = Magnetic Field Horizontal Plane
f = frequency
Performance Testing Qualification Testing
Magnetic Torquer Bars Fully Qualified
www.CayugaAstro.com, 607-319-4794 R140509-01
Custom TVAC chamber simultaneously tests 3 different MTBs up to 1500 Am2 (60 inch long)
Thermal Vacuum data for 3 small & 3 large MTBs: Coil temp < 95C at max power & 71C ambient