6-Ton Mass Properties Measuring Facility

The Mass Properties Measuring Facility is composed of a “mass measurement system” and a “mass properties measurement system”, which respectively measure the mass and the center of gravity and moment of inertia of a spacecraft.
The mass measurement system measures the mass of a test item by hanging it with a crane through a load cell. The mass of a test item weighing 150 kg or less can be measured with a large-scale precision mass measurement table that belongs to the facility.
The mass properties measurement system, meanwhile, measures the center of gravity and moment of inertia of a test item by rotating it on the rotary table supported by air bearings, simultaneously applying free vibration around its vertical axis.

System Architecture

6-Ton Mass Properties Measuring Facility System Architecture

Specifications

Mass measurement system
(load cell)		 Measurement range 100~6500 kg
Measurement accuracy 0.1% or less
Auxiliary equipment
(large-scale precision weight)		 Measurement range 1 g 〜150 kg
Measurement accuracy ±4 g
Mass properties measurement system Load capacity 60~6000 kg
Diameter of rotary table φ2000 mm
Accuracy of moment of inertia measurement 50 kg∙m2 or more: ±0.5%

Actual Applications

XRISM, SELENE, GCOM-W, GOSAT, GPM-DPR, etc.

Public Applications: Commercial satellites, etc.