Design method of liquid ring angular accelerometer and modeling method of dynamic-pressure process

Abstract

The invention provides a design method of liquid ring angular accelerometer and a modeling method of a dynamic-pressure process. The modeling method of the present invention realizes high-efficiency and high-precision liquid-phase angular accelerometer dynamic-pressure process modeling based on a simplified subspace identification method, and improves the efficiency of liquid ring angular accelerometer design. The modeling method of the present invention has a complex structure and multi-variable in the dynamic-pressure process. In the subspace identification used in the present invention, orthogonal triangle decomposition is used to reduce the complexity of the algorithm. The modeling method of the present invention uses the Akaike information quantity criterion to determine the order ofthe system, and reduces the influence of sampling sample shortage and noise on system order judgment. Since the dynamic-pressure modeling process of the present invention is simplified, the design ofa liquid ring angular accelerometer based on the design method of the liquid ring angular accelerometer can improve the production efficiency of the liquid ring angular accelerometer.

Description

technical field [0001] The invention belongs to the technical field of model identification, and in particular relates to a design method of a liquid ring angular accelerometer and a modeling method of a dynamic-pressure process. Background technique [0002] Angular acceleration has incomparable advantages over angular displacement and angular velocity in the dynamic characterization of angular motion, and can characterize the high-order characteristics of angular motion more directly, faster, and more accurately. In recent years, liquid-ring angular accelerometers based on fluid inertial mass have gradually become a research hotspot due to their high precision, high bandwidth and high reliability. [0003] The liquid ring angular accelerometer is mainly composed of a ring cavity, an inertial liquid and a piezoelectric transducer, in which the piezoelectric transducer is used as a sensitive element. The measurement process of the liquid ring angular accelerometer includes ...

AI Technical Summary

Problems solved by technology

The traditional modeling methods currently used, such as the least squares method and the maximum likelihood value method or the subspace identification algorithm, among them, the least squares method and the maximum likelihood value method need to have more prior knowledge of the internal structure of the system, However, due to the complexity of the internal structure of the angular acceleration measurement system, the available prior knowledge is extremely limited, and the modeling is difficult

For the subspace identification algorithm currently used in modeling, it does not require too much prior knowledge of the internal structure of the system, and can realize the modeling of the dynamic-pressure process. influences

[0005] In addition, due to the low efficiency and low precision of the existing dynamic-pressure process model modeling method, the efficiency of liquid ring angular accelerometer design based on the existing modeling method cannot be improved.

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