Three-redundancy server controller achieving power amplification unit fault absorption

Abstract

The invention discloses a three-redundancy server controller achieving power amplification unit fault absorption. The servo controller is applied to a high-reliability new-generation carrier rocket servo system and a guided missile series servo system. On the basis of data communication among three sub-controllers, information interaction and sharing are achieved, and the technic basis is provided for achieving fault absorption of a power amplification unit. Three-redundancy servo valve current signals are collected through a three-way analog-to-digital conversion unit and input to three CPU control units for current monitoring. When one way of power amplification unit has a one-degree fault, the output current of two ways of normal power amplification units is adjusted by adjusting the voltage output of three operational amplifier circuit output ends so as to compensate for the current output of a fault channel. According to the method, one-degree fault absorption of the power amplification units is achieved, the purpose of precisely controlling a three-redundancy servo valve is achieved during one-degree fault of the power amplification units, and when a partial functional circuit has a two-degree fault, the fault absorption function is achieved, and the reliability of the three-redundancy servo controller is improved.

Description

Technical field: [0001] The invention relates to a three-redundancy servo controller for realizing fault absorption of a power amplification unit, which is applied to a highly reliable new generation launch vehicle servo system and a missile series servo system. Background technique: [0002] At present, the known three-redundant servo controller receives the three-redundant digital control command of the control system through the 1553B bus, and each redundancy of the three-redundant servo controller collects the three-redundant The three-line displacement of the linear displacement sensor is processed by the majority voting algorithm of the linear displacement and the data closed-loop control algorithm by the DSP. After the digital / analog conversion and power amplification, the servo valve control current is output to the three pre-positions of a triple redundant servo valve. level, to control the servo actuator to perform corresponding actions. However, this method requi...

AI Technical Summary

Problems solved by technology

However, this method requires a large number of A / D converters (9 channels) to acquire line displacement signals, and only has a partial first-degree fault absorption function, and cannot perform fault absorption for faults that occur in the power amplifier unit

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