Liquid floated pendulum type accelerometer temperature control model parameter identification method

Abstract

The invention relates to a liquid floated pendulum type accelerometer temperature control model parameter identification method. According to the liquid floated pendulum type accelerometer temperature control model parameter identification method, a liquid floated pendulum type accelerometer temperature control model is revised into a first-order delay inertia model from a first-order inertial model, and an optimal sample space-based parameter identification method is put forward, and a relative residual error (SL) is constructed so as to be adopted as a regression model for liquid floated pendulum type accelerometer temperature control model parameter identification; an optimal sample space is obtained through conditional judgment and iterative calculation, so that high-accuracy identification of a time constant tau of a pure delay link and a time constant T of a first-order inertia link can be realized, and a basis can be provided for liquid floated pendulum type accelerometer temperature control system PID control parameter design, and the temperature control accuracy of a liquid floated pendulum type accelerometer can be increased, namely, the temperature control accuracy can be increased from a range (-1 DEC C, 1 DEC C) which is realized when the first-order inertial model is adopted to a range (-0.006 DEC C,+0.006 DEC C) which is realized when the first-order delay inertia model is adopted, and high-accuracy use requirements of the liquid floated pendulum type accelerometer can be satisfied.

Description

technical field [0001] The invention relates to a method for identifying parameters of an instrument temperature control model, in particular to a method for identifying parameters of a temperature control model of a liquid-floating pendulum accelerometer, and belongs to the technical field of testing technology and parameter identification. Background technique [0002] Under certain high-precision operating conditions, the temperature control accuracy of the liquid-floating pendulum accelerometer is required to be within ±0.1°C. Due to the restrictive factors of this type of instrument in terms of volume and structure, the heating device is a certain distance from the thermal device, resulting in a certain time delay for the temperature generated by the heating device to be transmitted to the thermal device, which affects the accuracy and stability of the temperature control system. Sex has an impact. [0003] In the current temperature control system design of the liquid...

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Problems solved by technology

[0005] At present, most of the domestic and foreign researches on the parameter identification of the temperature control model of the liquid-floating pendulum accelerometer stay in the research and parameter identification of the first-order inertial model, but there is no research on the parameter identification of the pure delay link and its time constant τ. public report

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