MEPSI Micro CubeSat Propulsion System

The MEMS PicoSat Inspector (MEPSI) Micro-Propulsion System (MiPS) is a cold gas propulsion module designed for 1U CubeSats.

Using Chemically Etched Micro System (ChEMS™) technology, VACCO has produced a complete CubeSat propulsion system including propellant storage, pressurization, distribution and thrusters. This simple, highly integrated design uses a self-pressurizing liquid propellant that is expelled as a gas.

Capable of 23 N-Sec of total impulse with up to 43,000 firings, MiPS brings true propulsion capabilities to micro-spacecraft for formation flying, attitude control and velocity change (delta-v).

Features

  • Five thrusters for pitch, yaw, roll and delta-v
  • 53 mN thrust
  • Up to 43,000 minimum impulse firings
  • Redundant, frictionless valves
  • All-welded titanium construction
  • Dry mass: 456 grams
  • Integral pressure & temperature sensors
Max Operating Pressure 150 psia Operating Temperature 0°C to +60°C Gas Tank Pressure Sensor Output 0.5 to 3.5 vdc
Proof Pressure 225 psia Vibration 16 Grms Coil Resistance 5.3 +/- 0.5  coil
Burst Pressure 375 psia Cycle Life 80,000 cycles Pull-in Voltage 3.5 vdc max @ 20°C
Thrust 53 mN @ 20ºC Minimum Impulse Bit 0.53 mN-sec Drop Out Voltage 1.0 vdc min @ 20°C
Internal Leakage 3.6 scc/hr GN2 @ 20ºC Operating Voltage 4.0 to 6.0 vdc Mass 456 grams (dry)
External Leakage 1.0 x 10 -6 scc/hr GN2 @ 20ºC Tank Pressure Sensor Output 0.5 to 3.5 vdc

Performance characteristics are based on customer requirements. As such, they are not representative of component capabilities or limitations.

Performance Characteristics

Mepsi-Performace-Characteristics

Envelope Drawing

System Schematic