Angular Molecular–Electronic Sensor with Negative Magnetohydrodynamic Feedback

Abstract

A high-precision angular accelerometer based on molecular–electronic transfer (MET) technology with a high dynamic range and a low level of self-noise has been developed. Its difference from the analogues is in the use of liquid (electrolyte) as the inertial mass and the use of negative feedback based on the magnetohydrodynamic effect. This article reports on the development of the angular molecular–electronic accelerometer with a magnetohydrodynamic cell for the creation of negative feedback, and the optimization of electronics for the creation of a feedback signal. The main characteristics of the angular accelerometer, such as amplitude–frequency characteristics, self-noise and Allan variance were experimentally measured. The obtained output parameters were compared to its analogues and it showed perspectives for further development in this field.

Error Analysis of Magnetohydrodynamic Angular Rate Sensor Combing with Coriolis Effect at Low Frequency

“…In studying the interaction between the flow field and electromagnetic field, it is critical to know the current density J due to induction. Since the physical processes of the MHD pump and sensing part are quite different, the different interaction methods and boundary types must be chosen [ 31 , 32 ]. Generally, two approaches may be used to evaluate the current density in FLUENT.…”

Permeability Model for Porous Transducer With Glass Spheres Packing

“…The results are included in Table 3 and occupy a highly consistency. Also, the shape factor for regular polygon is obtained by (9) and illustrated in Fig. 5.…”

“…Recently, the research in porous media and reservoir rocks has drawn lots of attention, especially in porosity and permeability [1], [2], which are essential parameters of electrokinetic effect. It is applied to a new type of motor measurement instrument, liquid circular angular accelerometer (LCAA) [3]- [8], which is developed to meet the application requirements for angular acceleration in different fields, such as motion recognition [9]- [11] and biomedicine [12]- [14]. Porous transducer [3] is the key component of LCAA due to a conversion between differential pressure generated by input of angular acceleration, and streaming potential characterizing the electrokinetic effect [15], which exists in the interface between porous transducer and fluid mass flowing through the microchannels.…”

Study of Systems Error Compensation Methods Based on Molecular-Electronic Transducers of Motion Parameters

“…The measurement accuracy in accordance with [12] is influenced directly by the primary sensor self-noise. Besides, temperature drift [15,16] and special aspects of the output to the mode of the molecular-electronic sensor must be taken into account [17,18].…”