Abstract
This paper presents the design of a novel small-angle transducer characterized by a simple structure, fast response and very low reaction torque. A theoretical model is presented which describes the linear relationship between the output voltage and the angular displacement when the rotor rotates away from the null position. By analysis of the theoretical model, it is revealed that the small-angle transducer possesses a very high linearity within ±4° and a high sensitivity (approximately 0.34 V/°), and the parameters affecting output characteristics can be obtained. Furthermore, it is found that the transducer sensitivity can be improved by optimizing the load impedance and excitation frequency. These findings are verified by numerical evaluations. In addition, the established theoretical model and simulation analysis provide a quantitative method for analyzing the output characteristics of the novel small-angle transducer.
Highlights
Electromechanical inertial sensors play an important role in inertial navigation and control applications due to their high accuracy and reliability [1,2,3,4,5,6,7,8]
For a given excitation voltage, the angular transducer used in electromechanical inertial sensors is used to provide a voltage output signal that is proportional to the angular displacement of the rotor from a null position [9,10,11,12]
We present the design of a novel small-angle transducer used in high-precision inertial sensors
Summary
Electromechanical inertial sensors play an important role in inertial navigation and control applications due to their high accuracy and reliability [1,2,3,4,5,6,7,8]. Because the rotor is made of a highly conductive non-magnetic material (e.g., copper), a radial magnetic pull is not formed on the rotor; this novel small-angle transducer can achieve a very low reaction torque, so that it is suitable for use in high-precision inertial sensors. It is done through an analysis of the theoretical model over a range of angles of rotation, excitation frequencies and resistances etc.
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