Rationale for Adaptive Accelerometer Inverter Adjustable Current Source Scheme

Аuthors

Vatutin M. A.^*, Zubkov A. V., Butyrin A. V.

Mlitary spaсe Aсademy named after A.F. Mozhaisky, Saint Petersburg, Russia

*e-mail: vka@mil.ru

Abstract

The article describes a method allowing changing the conversion factor of a pendulum accelerometer, operating in the self-oscillating mode, due to application of the developed circuit of the controlled current source of the reverse converter for the accelerometer parameters adjusting to the perturbing factors.
Solving the problem of the perturbing factors and disturbances generated by them is possible by adjusting characteristics of the inertial sensors to minimize errors, i.e. adapting the sensors characteristics, which will allow forming optimal characteristics at the given flight mode by the parametric identification of the perturbing factors, ensuring accuracy of the navigation problem solution.
The proposed rationale of the controlled current source circuit is based on the provisions of State Standard R 8.673-2009 “Smart sensors and smart measuring systems. Basic terms and definitions”. The initial data are parameters of the compensation circuits ща the pendulum accelerometer, information on the stability of the employed radio elements, as well as the error models of the converter.
The authors propose applying an electrically controlled electronic current source in a reverse converter of a pendulum accelerometer operating in self-oscillating mode, which allows implementing both discrete switching of the current value and its smooth change.
Application of the adjustable current source allows adjusting the self-oscillating accelerometer to the specified measurement ranges required in various modes, and ensure the ability to adjust smoothly the current value, necessary to implement the accelerometer adaptability function.
The rationale considered in the article includes the development of an electrical circuit of a controlled electronic current source and its stability assessment.
The proposed rationale for the controlled current source scheme may be employed by the specialists while design and manufacture of adaptive accelerometers.

Keywords:

adaptive accelerometer, strapdown inertial navigation system, self-oscillating mode, reverse converter, stable current

References

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