Design and Verification of a Micro-Vibration Disturbance Source Simulation System for Spacecraft

This paper presents a multi-axis sine-on-random (SoR) vibration test system designed for spacecraft micro-vibration disturbance source simulation. The system design comprises three subsystems: exciter assembly, control system, and data acquisition/transmission system. The shaker assembly integrates test articles, interface tooling, inertial exciters, and force measurement plates. An innovative inertial exciter with dual mounting configurations (bolted and bonded) was developed to enable real-time inertial force monitoring. The LabVIEW-based control system implements pre-test diagnostics, transfer function analysis, and multi-dimensional force closed-loop control. Data acquisition employs domestically developed PXIe hardware including controller modules, I/O modules, and portable chassis. A numerical control simulation case was demonstrated using ANSYS software. Experimental validation confirmed the system's capability in micro-vibration disturbance replication.