This paper investigates the reconstruction and maintenance of the inner-formation system
for an innovative drag-free spacecraft with double spherical test masses in consideration of …

This paper presents Part II of a review on DFACS, which specifically focuses on the
modeling and analysis of disturbances and noises in DFACSs. In Part I, the system …

Underactuated collision-free controllers are proposed in this paper for multiple spacecraft
formation reconfiguration in circular orbits with the loss of either the radial or in-track thrust. A …

Gravitational waves are ripples in space–time predicted by Albert Einstein's general relativity
and provide a new way to understand the universe. Space-borne detectors of gravitational …

A Lorentz spacecraft is an electrostatically charged space vehicle that could actively
modulate its surface charge to generate Lorentz force as it moves through the planetary …

Modeling of the dynamics and disturbances and designing of the precise formation
controller are two major problems for the inner-formation flying system (IFFS). This paper …

An electrostatically charged spacecraft accelerates as it moves through the Earth׳ s
magnetic field due to the induced Lorentz force, providing a new means of propellantless …

Q-SAT, a small spherical satellite designed and developed by Tsinghua university, was
successfully launched on Aug 6, 2020 at Jiuquan satellite launch center in China. The …

A spherical microsatellite, aimed at technology verification of upper atmospheric density
detection and precision orbit determination in low Earth orbit (LEO), has been developed by …

This paper addresses the capturing control problem of a plug‐and‐play modularized drag‐
free spacecraft system, including two spherical proof masses, where the performance …