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Redundancy control method based on double position sensors

A redundant control and sensor technology, which is applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as miniaturization that is difficult to meet the volume, and achieve the goal of preventing the risk of wrong switching, simple implementation, and improved reliability Effect

Active Publication Date: 2015-08-12
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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  • Redundancy control method based on double position sensors
  • Redundancy control method based on double position sensors
  • Redundancy control method based on double 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, which can simultaneously 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 th...

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Abstract

A redundancy control method based on double position sensors comprises the steps of using a redundancy decision module to carry out the extreme value fault discrimination on the output values of the two position sensors of a servo system, selecting to output the output value of the position sensor not generating an extreme value fault, if the two position sensors do not generate the extreme value faults, discriminating the consistency of two feedbacks, if the two feedbacks are consistent, keeping the constant output of the current position sensor, if the two feedbacks are inconsistent, carrying out the zero value fault discrimination, selecting to output the output value of the position sensor not generating a zero value fault, if the two position sensors do not generate the zero value faults, carrying out the feedback and instruction error discrimination, and outputting the output value of the position sensor having a small absolute value of an error value of the output value and an instruction. The redundancy control method based on double position sensors of the present invention is easy to realize, and is good in fault compatibility and high in 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 Applications(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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