Transfer function of fluidic system in liquid-circular angular accelerometer

Frequency-Dependent Streaming Potential in a Porous Transducer-Based Angular Accelerometer

“…The angular accelerometer based on direct measurement of angular acceleration is widely used in rotation control, navigation, and vibration detection [1]. Recently, a new liquid circular angular accelerometer (LCAA) [2,3,4,5,6] was developed based on inertial liquid mass. Compared with other types of angular accelerometers, such as a molecular electronic transducer (MET) based on four electrodes [7,8,9,10], MEMS [11], heat transfer [12,13], and electromagnetic [14], LCAA possesses a balanced performance within the frequency range, accuracy, and space consumption.…”

“…The porous transducer is a critical component of LCAA, which is sintered by glass microspheres under high temperature, and it is the only primary difference when compared with MET-based on four electrodes [7,8,9,10]. According to the principle of LCAA [2], the system of LCAA can be divided into two subsystems including a fluidic system and a molecular electronic system. Although, plenty of works on the fluidic system have been conducted and different models for fluid systems have been proposed [3,4,5], there are still many problems in establishing a theoretical model of the molecular electronic system, which is based on the electrokinetic effect [15] generated when fluid flows through a porous transducer.…”

Dynamic Fluid in a Porous Transducer-Based Angular Accelerometer

“…Angular acceleration plays a significant role in vibration detection, rotation controlling and navigation [ 1 , 2 ]. To achieve reliable and accurate direct angular acceleration measurements, different physical principles and technologies have been used: including superconductivity [ 3 ], floated-fly-wheel [ 4 ], MEMS [ 5 ], heat transfer [ 6 , 7 ], electromagnetics [ 8 ] and fluidics [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. The fluid-based design demonstrates an excellent balance in accuracy, bandwidth, measurement range, volume and insensitivity to linear acceleration [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ].…”

“…The fluidic channel is the fundamental structure in all fluid-based angular accelerometers, although different designs have been proposed [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. The angular acceleration input is converted into differential pressure in the fluidic channel, which is measured precisely by a special transducer.…”

“…The angular acceleration input is converted into differential pressure in the fluidic channel, which is measured precisely by a special transducer. In [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ], different transducers have been carefully chosen to implement the pressure measurement. The molecular electronic transducer (MET) was utilized together with iodine-iodide electrolyte containing potassium iodide to transform the fluidic pressure into an electrical signal [ 9 , 10 , 11 , 12 , 13 , 14 ].…”