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Three-level temperature control system of inertia measurement system

A technology of temperature control system and inertial measurement, which is applied in the direction of temperature control by electric mode, navigation by speed/acceleration measurement, auxiliary controller with auxiliary heating device, etc. The temperature gradient of the measurement system is large, and the normal operation of the inertial group is guaranteed to achieve the effects of shortening the stabilization time, good matching performance, and strong anti-interference ability

Active Publication Date: 2013-11-27
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology

[0004] The operating environment of the inertial navigation system is relatively complicated. The existing inertial measurement system adopts a two-level temperature control method. The accuracy of the inertial instrument is easily affected by the change of the external environment temperature. The heated temperature control system cannot guarantee the normal operation of the inertial group under high temperature conditions

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Embodiment Construction

[0019] According to the second law of thermodynamics, as long as there is a temperature difference between objects, the high temperature must transfer heat to the low temperature. This process is called heat transfer. The greater the temperature difference, the greater the heat transfer. As the temperature of the heating element itself rises, the temperature of the environment in contact with it increases, and the heat transfer also increases. When the temperature of the heating element is higher than the ambient temperature by a fixed value, the temperature of the heating element itself will no longer rise, and a dynamic equilibrium will be reached at this time. This fixed temperature difference above the ambient temperature is called the stable temperature rise of the heating element, which depends on the thermal power and heat dissipation of the heating element itself. Heat transfer methods mainly include conduction, convection and radiation. Heat is transferred from one p...

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Abstract

The invention discloses a three-level temperature control system of an inertia measurement system. A gradient temperature difference control mode is adopted, temperature control of an inertia instrument is added on the basis of original first-level or second-level temperature control, three-level temperature control is achieved, and the three-level temperature control system controls a box body, an installing table body and the inertia instrument respectively, therefore, the influence of the outside environment temperature change on the accuracy of the inertia instrument is reduced to the maximum, the temperature gradient inside the inertia measurement system is effectively reduced through the three-level temperature control, the inertia measurement system can normally work under wide temperature environmental conditions to achieve stable working temperature, accuracy of temperature control is improved, and stabilization time of temperature control is shortened. According to the designed three-level temperature control system, a PWM temperature control mode and a digital PID temperature control mode are adopted, high antijamming capacity, stability and electromagnetic compatibility are possessed, and the temperature control system can be matched with a refrigeration fan and refrigeration modes of semiconductor refrigeration and the like for use, and is wide in application range, high in environmental adaptability, and good in stability.

Description

technical field [0001] The invention relates to a temperature control system, in particular to a three-stage temperature control system of an inertial measurement system, belonging to the technical field of temperature control. Background technique [0002] Inertial measurement system is a technology fusion integrating automatic control, mechanical engineering, materials, computer, microelectronics, optics, mathematics, mechanics, thermal and other disciplines and engineering technology fields. The thermal control technology of the inertial measurement system is one of the important guarantee systems to ensure the working accuracy of the inertial device, that is, to control the heat exchange process between the internal and external environment of the inertial navigation system, so that the thermal balance temperature is within the temperature range required by the inertial device, and reduce the temperature change. The impact on the working accuracy of inertial devices. As...

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Application Information

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IPC IPC(8): G05D23/32G01C21/16
Inventor 何青段宇鹏魏宗康
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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