Electronic noise modeling and temperature dependence analysis for liquid circular angular accelerometers

This paper investigates the electronic noise of liquid circular angular accelerometers (LCAAs) and its temperature dependence. First, an equivalent circuit model for the LCAA is proposed based on the underlying electrokinetic principles that govern its operation. Building upon this equivalent circuit model, an electronic noise model is developed that incorporates the individual noise contributions from the electronic components. Additionally, the temperature dependence of the LCAA electronic noise across the typical operating temperature range is examined via parameter analysis based on the proposed model. Simulations were carried out to calculate the LCAA electronic noise spectral density, root mean square, and their temperature dependence. Then, experiments were conducted on the vibration isolation platform and in the temperature chamber to measure the LCAA noises. The characteristics of the measured noises are in good agreement with those simulated substantiating the reliability of the proposed model.