Intelligent control algorithm used for passive hydrogen clock

Abstract

The invention discloses a frequency locking control algorithm used for a passive hydrogen clock, which comprises the following steps: (1) setting an initial value of the voltage of a control resonant cavity, and finding out a voltage value of a control crystal oscillator through coarse scanning; (2) setting the voltage of the control crystal oscillator as the voltage acquired in the last step, and finding out the voltage value of the control resonant cavity; (3) setting the voltage of the control resonant cavity as the voltage acquired in the last step, and finding out the voltage value of the control crystal oscillator through fine scanning based on the step 1; (4) setting the voltage of the control crystal oscillator as the voltage acquired in the last step, and finding out the voltage value of the control resonant cavity through fine scanning based on the step 2; (5) rescanning the control voltage based on the voltages acquired in the steps 3 and 4, calculating the coupling property of a loop circuit according to the scanning voltage and error, calculating a control parameter of a steady state process, and evaluating the error; and (6) calculating a control quantity comprising error decoupling and control state storage, and providing an optimal control quantity according to the latest control storage quantity and the current control value.

Description

technical field [0001] The invention belongs to the field of atomic frequency standard locking algorithms, in particular, it belongs to the automatic frequency locking algorithm of the miniaturized passive hydrogen clock servo control part, and especially relates to an intelligent control algorithm for passive hydrogen clocks. Background technique [0002] The hydrogen atomic clock is a frequency standard based on the transition of hydrogen atoms, and its transition frequency is about 1.4GHz. The existing passive hydrogen clock is a non-self-excited atomic oscillator. Due to the relatively low Q value of the microwave cavity, the hydrogen maser cannot self-excite and oscillate, and requires an externally injected detection signal to work normally. The closer the injected detection signal is to the transition frequency, the more energy can be used to excite the energy state transfer (stimulated emission) of hydrogen atoms. By receiving an error signal the deviation of the re...

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Problems solved by technology

[0004] Neither of these two methods can completely avoid the mutual interference between the crystal oscillator and the resonant cavity loop, which is also the difficulty of frequency locking control. How to minimize the mutual traction to obtain an effective control amount

In addition, during the debugging process, there are problems such as slow search for the frequency locking voltage point, low precision, changes in control parameters caused by changes in the control loop, and other problems that need to be re-tuned, and the anti-interference ability needs to be further strengthened.

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