Temperature controlling method for satellite-borne rubidium clock temperature-control cabin

Abstract

The invention discloses a temperature controlling method for a satellite-borne rubidium clock temperature-control cabin and belongs to the technical field of spacecraft thermal control. Firstly, the maximum power needed by additional heating of a heater is detached, so that multiple one-way heaters with low power are formed. Secondly, thermal hysteresis time of the one-way heaters is calculated so as to design a control time interval of each one-way heater, after control of all the heaters is finished according to the time intervals, a complete heating and control period is formed. A system is provided with a backup temperature sensor and the heaters, when a main temperature sensor is effective or the main heater incorrectly responds to a controller switch order, primary backup switch is finished. The method for controlling the temperature and automatically dealing with a fault can provide high-precision and high-stability temperature control for the working environment of a rubidium clock. The control method is simple, high-efficiency, reliable and capable of meeting the requirement for long-time orbital continuous and stable work.

Description

technical field [0001] The invention relates to a temperature control and fault autonomous disposal method of a space-borne rubidium clock temperature control cabin, belonging to the technical field of spacecraft thermal control. Background technique [0002] Spaceborne atomic clocks usually need to work in a temperature environment with high temperature control accuracy and high temperature control stability. Taking navigation satellites as an example, the ambient temperature control accuracy of rubidium atomic clocks is required to be better than ±0.3°C, and the day stability control is better than ±1°C. [0003] Navigation satellites are generally equipped with one working rubidium clock, one hot backup rubidium clock and several cold backup rubidium clocks. During the in-orbit flight, the rubidium clock may be switched between the main backup and the hot and cold backup. At the same time, different manufacturers of rubidium clocks have different changing laws of stable...

AI Technical Summary

Problems solved by technology

Changes in the heat consumption of the rubidium clock, changes in the input of external heat flow, and changes in the heat leakage of the small cabin will complicate the selection and adjustment of parameters such as proportional, integral, and differential in the small cabin temperature control system

In the PID temperature control system, it is necessary to realize the adjustable heating power, which will make the power supply circuit of the heater complicated

Therefore, the commonly used PID temperature control system is used to control the temperature of the rubidium clock and the small cabin with high precision and high stability. The system itself is relatively complicated, which is not conducive to the realization of the goal of high reliability, continuous and stable operation of navigation satellites during in-orbit flight.

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