# Study of the Extremely Low-Frequency Noise Characteristics of a Micro-Thrust Measurement Platform

## TL;DR

This study improves a micro-thrust measurement platform by optimizing its design to reduce noise and increase stability.

## Contribution

The novel contribution is optimizing pivot thickness and pendulum rod length to minimize vibration effects on the platform.

## Key findings

- A pivot thickness of 0.04 mm or 0.2 mm with a 2 m pendulum rod minimizes vibration effects.
- A series double-pivot structure with increased sheet distance further enhances stability.
- The platform achieves 0.0057 μN/Hz resolution at 0.1 mHz.

## Abstract

The critical structural parameters are optimized and studied using the numerical simulation method to improve the resolution and stability of the Micro-Thrust Measurement Platform (MTMP). Under two different ground random vibration environments, the parameters, such as pivot thickness, pendulum rod length, and pivot structure, are focused on analyzing the influence of the system’s resolution and stability. The results show that when the thickness of the pivot is 0.04 mm or 0.2 mm, and the pendulum rod length is 2 m, the effect of ground random vibration on the MTMP is minimized. At 0.1 mHz, it can reach 0.0057 μN/Hz. In the series double-pivot structure, an appropriate increase in the distance between the sheets can further optimize the above conclusions. The results and analysis within this study can provide support for the engineering design of the MTMP.