Improving environmental noise suppression for micronewton force sensing based on electrostatic by injecting air...

Area of Science:

• Metrology
• Mechanical Engineering
• Materials Science

Background:

• Micro/nano force measurement systems are crucial for scientific traceability to the International System of Units.
• These systems, often electrostatic force balances, are vulnerable to environmental disturbances, impacting measurement accuracy.
• Existing methods for disturbance reduction offer limited improvements in resolution and response speed.

Purpose of the Study:

• To enhance the stability and environmental noise suppression of micro/nano force measurement systems.
• To investigate the combined effect of air damping and internal molecular friction on system performance.
• To achieve high resolution and fast response in micro/nano force measurements.

Main Methods:

• Implementing a combined damping strategy using air damping and inherent damping from spring suspension molecular friction.
• Developing an air damping model to analyze its impact on system dynamics.
• Evaluating system stability, vibration resistance, and response characteristics.

Main Results:

• The air damping model demonstrated a significant increase in the damping ratio, from 0.0005 to 0.1.
• This increase in damping ratio substantially improved the system's vibration resistance.
• The integrated damping approach resulted in a system with notably fast response times and reduced data scatter.

Conclusions:

• The combination of air damping and inherent damping effectively optimizes micro/nano force measurement system stability.
• This approach significantly suppresses environmental noise, leading to more reliable measurements.
• The developed system offers a promising solution for high-resolution, fast-response micro/nano force metrology.