A Redundant Control Method Based on Dual Position Sensors

A redundant control and sensor technology, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as miniaturization requirements that are difficult to achieve, achieve the risk of preventing false switching, simplify implementation, and improve reliability. Effect

Active Publication Date: 2017-09-19
SHANGHAI XINYUE METER FACTORY
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AI Technical Summary

Problems solved by technology

The new generation of launch vehicles uses an integrated three-redundant position sensor, and adopts a redundant judgment method of "out of three". However, for small servo systems with strict requirements on volume and weight, it is difficult for the existing three-redundant position sensor to achieve a small size. requirements

Method used

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  • A Redundant Control Method Based on Dual Position Sensors
  • A Redundant Control Method Based on Dual Position Sensors
  • A Redundant Control Method Based on Dual Position Sensors

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Embodiment Construction

[0026] based on the following Figure 1 ~ Figure 3 , specifically explain the preferred embodiment of the present invention.

[0027] The servo system of a new-generation launch vehicle uses existing resources according to the space layout requirements and uses two independent small position sensors (single weight 15g). The two position sensors 101 are distributed on both sides of the output shaft of the servo mechanism. Detect the swing angle output of the servo mechanism.

[0028] Such as figure 1 As shown, the structure of the position sensor 101 is similar to a sliding rheostat. The position sensor 101 has a feedback negative power supply terminal 1, a feedback positive power supply terminal 3 and a feedback output terminal 2, and the feedback negative power supply terminal 1 and the feedback output terminal 2 Between the A-B section resistance matrix, between the feedback positive power supply terminal 3 and the feedback output terminal 2 is the B-C section resistance m...

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Abstract

A redundant control method based on dual position sensors. The redundant judgment module judges the extreme value faults of the output values ​​of the two position sensors of the servo system, and selects the output value of the position sensor without extreme value faults for output. None of the position sensors have an extreme value fault, then conduct the consistency judgment of the two feedbacks, if the two feedbacks are consistent, keep the current output of the position sensor unchanged; The output value of the position sensor with a zero value fault is output. If the two position sensors do not have a zero value fault, then the feedback and command error judgment is performed, and the output value of the position sensor with a small absolute value of the error value between the output value and the command is output. value to output. The invention has the advantages of simple realization, good fault compatibility and high reliability.

Description

technical field [0001] The invention relates to a redundant control method based on dual position sensors. Background technique [0002] The servo system is an important attitude and orbit control execution subsystem of the launch vehicle. By collecting the position feedback signal in real time and comparing it with the position command signal, the position closed-loop control is formed to realize the position tracking of the load. The position sensor is an important part of the position output of the servo system, and its reliability is very important. [0003] Usually the failure rate of the position sensor is high. In order to improve the reliability, most of them adopt redundant technology at present, such as the method of "connecting the output ends of two position sensors in parallel" used on the launch vehicle in active service. It is effective, but when there is an open circuit fault in one feedback power supply, the actual feedback output value will deviate. The n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B9/03
Inventor 冯伟傅俊勇胡翔宇钱昌年冀娟
Owner SHANGHAI XINYUE METER FACTORY
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