CN113865450B - Trajectory solution protection environment identification method based on overload signal time domain characteristics - Google Patents

Trajectory solution protection environment identification method based on overload signal time domain characteristics Download PDF

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CN113865450B
CN113865450B CN202111196908.0A CN202111196908A CN113865450B CN 113865450 B CN113865450 B CN 113865450B CN 202111196908 A CN202111196908 A CN 202111196908A CN 113865450 B CN113865450 B CN 113865450B
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acceleration
overload
axial
time domain
rotating speed
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CN113865450A (en
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杨成伟
宋慧波
毛瑞芝
杨银芳
李�杰
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Beijing Institute of Technology BIT
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation

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Abstract

The invention provides a ballistic solution protection environment identification method based on overload signal time domain characteristics, which comprises the following steps: an axial overload acceleration sensor and a centrifugal rotating speed overload acceleration sensor are installed in the fuze electronic safety system, and the axial overload acceleration and the centrifugal rotating speed overload acceleration in the flying process of the ammunition shot are collected; continuously acquiring N times of axial overload acceleration within T time, and judging that an axial overload environment is established when the times of the axial overload acceleration is greater than a set threshold value and is greater than a set time; continuously acquiring N times of centrifugal rotating speed overload acceleration within T time, judging that a centrifugal rotating speed overload environment is established when the times of more than a set threshold value are more than a set time, and stopping safety relief if the times of more than the set threshold value are not more than the set time; and then, carrying out time domain characteristic analysis on the axial overload acceleration signal and the centrifugal rotating speed overload acceleration signal in a set time window, and judging the time domain characteristics which accord with the ballistic environment when the time domain characteristic parameters fall within a preset solution protection condition range.

Description

Trajectory solution protection environment identification method based on overload signal time domain characteristics
Technical Field
The invention relates to the technical field of environmental protection and environmental identification of a gun fuse safety system, in particular to a ballistic protection and environmental protection identification method based on overload signal time domain characteristics.
Background
The safety system (safety and safety release device) of the artillery detonator is an electromechanical and fully electronic igniter loaded on high-technology weapons such as shells, missiles and the like, and has the functions of strictly ensuring that the ammunition cannot be released in the processes of transportation, storage, detection, loading and unloading and the safe distance between the process of launching and the after-launching of the ammunition, only correctly releasing the safety when the preset conditions for releasing the safety are met, and controlling the blasting part by the detonator. The existing artillery fuze safety system identifies the preset conditions for relieving the insurance, mainly depends on a sensor to measure the trajectory environmental acceleration signals in the ammunition launching stage, takes a threshold value + sequence + time window as the logical judgment criterion for relieving the insurance of the safety system, judges whether the acceleration signals meet the preset conditions for relieving the insurance, and then outputs the signals for relieving the insurance to detonate the warhead at the preset time and the preset position.
Take the fuse electronic security and the safety device of removing of the general type that plum is melodious and Yuanshiwei designed in thesis "fuse electronic security and safety device of removing as an example, its major structure has two application specific integrated circuits, two static electronic switch, a dynamic electronic switch and constitutes. Wherein the application specific integrated circuit is used for identifying the information of the environment to be relieved by the principle of the relief logic of 'threshold value + sequence + time window'.
The existing artillery fuse safety system mainly depends on a sensor to collect ammunition flying trajectory environment overload signals, the 'threshold value + sequence + time window' is used as a fuse relieving logic judgment criterion of the safety system, whether the collected acceleration overload signals meet the preset fuse relieving environment conditions is judged, and then independent safety pieces (2 static switches and 1 dynamic switch) are controlled to finish fuse relieving actions. The safety relief mode is judged by only depending on the energy threshold value of the ballistic environment overload signal, and a large amount of information characteristics of the ballistic environment are lost, so that the high safety and the high reliability of the fuze cannot be guaranteed.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a ballistic solution protection environment identification method based on overload signal time domain characteristics, which is used for solving the problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a ballistic solution protection environment identification method based on overload signal time domain characteristics, which comprises the following steps: an axial overload acceleration sensor and a centrifugal rotating speed overload acceleration sensor are installed in the fuze electronic safety system, and the axial overload acceleration and the centrifugal rotating speed overload acceleration in the flying process of the ammunition shot are collected;
continuously collecting N times of axial overload acceleration within T time, judging that an axial overload environment is established when the number of times that the axial overload acceleration is greater than a set threshold value is greater than a set number of times, closing a static switch, and removing a first-level fuse, otherwise, terminating the fuse removal;
continuously collecting N times of centrifugal rotating speed overload acceleration within T time, judging that a centrifugal rotating speed overload environment is established when the number of times that the centrifugal rotating speed overload acceleration is greater than a set threshold value is greater than a set number of times, closing another static switch, and removing a secondary safety, otherwise, stopping the safety removal;
and then, performing time domain characteristic analysis on the axial overload acceleration signal and the centrifugal rotating speed overload acceleration signal in a set time window, judging that the time domain characteristic accords with the time domain characteristic of a ballistic environment when the time domain characteristic parameters fall within a preset protection condition range, closing a dynamic switch, and removing the three-level insurance, otherwise, terminating the safety removal.
Further, the time domain characteristic parameters include: rate of change of acceleration
Figure BDA0003302984840000021
And acceleration rate of change
Figure BDA0003302984840000031
If it is used
Figure BDA0003302984840000032
The temporal characteristics of the ballistic environment are considered to be met, wherein,
Figure BDA0003302984840000033
the lower limit of the rate of change of axial or centrifugal acceleration,
Figure BDA0003302984840000034
is the upper limit of the rate of change of the axial or centrifugal acceleration;
Figure BDA0003302984840000035
the lower limit of the acceleration change rate of the axial direction or the centrifugal direction,
Figure BDA0003302984840000036
the upper limit of the acceleration change rate of the axial direction or the centrifugal direction.
By adopting the technical scheme, the invention has the following beneficial effects:
according to the invention, on the basis of carrying out the arming logic judgment by using the energy threshold of the ballistic environment in the traditional 'threshold + time sequence + time window', the time domain characteristic parameter of the acceleration signal of the ballistic environment is obtained by using a curve fitting method, and the time domain characteristic parameter is used as the basis for the arming logic judgment of the fuze. The novel method adopts a method of 'signal energy + signal characteristics', fully utilizes the information time domain characteristics of the ballistic environment in the flight process of the artillery and ammunition, can effectively ensure the safety and the action reliability of the fuze, and improves the safety of the fuze by one order of magnitude.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of the fuze electronic security system environment release work flow of the present invention;
FIG. 2 is a time domain plot of the pre-flight 5s axial acceleration overload of the present invention;
FIG. 3 is a time domain variation curve of centrifugal acceleration overload 5s before flight in the present invention;
wherein, 1 is a change curve of the front 5s axial acceleration overload in the high temperature environment, 2 is a change curve of the front 5s axial acceleration overload in the normal temperature environment, 3 is a change curve of the front 5s axial acceleration overload in the low temperature environment, 1 'is a change curve of the front 5s centrifugal acceleration overload in the high temperature environment, 2' is a change curve of the front 5s centrifugal acceleration overload in the normal temperature environment, and 3 represents a change curve of the front 5s centrifugal acceleration overload in the low temperature environment.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Referring to fig. 1 to 3, the present embodiment provides a ballistic solution protection environment identification method based on overload signal time domain characteristics, and fig. 1 is a workflow of environmental solution protection of a fuze electronic security system in the present embodiment. After the artillery and ammunition is launched, on one hand, the fuze electronic safety system adopts a judgment method of 'threshold value + time sequence + time window', axial overload acceleration acquired for N times continuously is compared with a set threshold value, if the acquired point value is greater than the set threshold value with a certain probability within T time, an axial overload environment is considered to be established, a static switch is closed, and primary insurance is relieved. And on the other hand, the centrifugal rotating speed overload acceleration acquired for N times continuously is compared with a set threshold value, if the acquired point value is greater than the set threshold value with a certain probability within the time of T, the centrifugal rotating speed overload environment is considered to be also established, the second static switch is closed, and the secondary insurance is relieved.
On the basis, the fuze electronic safety system simultaneously carries out time domain characteristic analysis on the collected axial and centrifugal rotating speed overload acceleration signal values in a 1.5s time window (the length of the time window is determined according to the actual situation). Referring to fig. 2 and fig. 3, the graphs are time domain variation curves of the overload signal of the flying environment in the first 5 seconds acquired in this embodiment, in fig. 2, a curve 1 represents a variation curve of the overload of the axial acceleration in the first 5s under the high temperature environment, a curve 2 represents a variation curve of the overload of the axial acceleration in the first 5s under the normal temperature environment, and a curve 3 represents a variation curve of the overload of the axial acceleration in the first 5s under the low temperature environment. In fig. 3, a curve 1' represents a variation curve of the centrifugal acceleration overload of the first 5s in the high temperature environment, a curve 2' represents a variation curve of the centrifugal acceleration overload of the first 5s in the normal temperature environment, and a curve 3' represents a variation curve of the centrifugal acceleration overload of the first 5s in the low temperature environment.
The acceleration change rate is obtained by curve fitting for the acceleration overload curves in fig. 2 and 3
Figure BDA0003302984840000051
Acceleration rate of change
Figure BDA0003302984840000052
An isochronous domain characteristic parameter. If the obtained time domain characteristic parameter is in the preset solving and protecting condition range
Figure BDA0003302984840000053
The time domain characteristics of the ballistic environment are considered to be met, thereby closing the motionAnd the state switch is used for releasing the three-level insurance. Wherein
Figure BDA0003302984840000054
The lower limit of the rate of change of axial or centrifugal acceleration,
Figure BDA0003302984840000055
is the upper limit of the rate of change of the axial or centrifugal acceleration;
Figure BDA0003302984840000056
the lower limit of the acceleration change rate of the axial direction or the centrifugal direction,
Figure BDA0003302984840000057
the upper limit of the acceleration change rate of the axial direction or the centrifugal direction.
According to the method, on the basis of a traditional fuze arming logic judgment criterion of 'threshold value + time sequence + time window', the time domain characteristics of ballistic environment information which is specific to artillery ammunition in the launching process and the flight process are fully utilized and used as the basis for fuze arming logic judgment.
By adopting a method of 'signal energy + signal characteristic', under the condition that the axial overload and centrifugal overload relief conditions are both met (signal energy relief conditions), the time domain characteristics of the acceleration overload curve of the ballistic environment are fully utilized, curve fitting time domain analysis is carried out on the acquired axial overload signal and centrifugal overload signal within a 1.5s time window (the length of the time window is determined according to the actual situation), and time domain characteristic parameters such as the acceleration change rate and the acceleration change rate of the axial overload and the centrifugal overload are solved. And judging that the obtained time domain characteristic parameters are in the preset solution condition range (signal characteristic solution condition), and determining that the time domain characteristics accord with the time domain characteristics of the ballistic environment, thereby relieving insurance.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.

Claims (1)

1. A trajectory solution protection environment identification method based on overload signal time domain characteristics is characterized by comprising the following steps: an axial overload acceleration sensor and a centrifugal rotating speed overload acceleration sensor are installed in the fuze electronic safety system, and the axial overload acceleration and the centrifugal rotating speed overload acceleration in the flying process of the ammunition shot are collected;
continuously collecting N times of axial overload acceleration within T time, judging that an axial overload environment is established when the number of times that the axial overload acceleration is greater than a set threshold value is greater than a set number of times, closing a static switch, and removing a first-level fuse, otherwise, terminating the fuse removal;
continuously collecting N times of the centrifugal rotating speed overload acceleration within T time, judging that a centrifugal rotating speed overload environment is established when the number of times that the centrifugal rotating speed overload acceleration is larger than a set threshold value is larger than a set number of times, closing another static switch, and removing a secondary safety, otherwise, stopping removing the safety;
then, performing time domain characteristic analysis on the axial overload acceleration signal and the centrifugal rotating speed overload acceleration signal in a set time window, judging that the time domain characteristic accords with the time domain characteristic of a ballistic environment when the time domain characteristic parameter falls within a preset protection condition range, closing a dynamic switch, and removing the three-level safety, otherwise, terminating the safety removal;
the time domain characteristic parameters comprise: rate of change of acceleration
Figure FDA0003947878640000011
And acceleration rate of change
Figure FDA0003947878640000012
If it is not
Figure FDA0003947878640000013
The temporal characteristics of the ballistic environment are considered to be met, wherein,
Figure FDA0003947878640000014
the lower limit of the rate of change of the axial or centrifugal acceleration,
Figure FDA0003947878640000015
is the upper limit of the rate of change of the axial or centrifugal acceleration;
Figure FDA0003947878640000016
the lower limit of the acceleration change rate of the axial direction or the centrifugal direction,
Figure FDA0003947878640000017
the upper limit of the acceleration change rate of the axial direction or the centrifugal direction.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4409899A (en) * 1981-07-27 1983-10-18 The United States Of America As Represented By The Secretary Of The Air Force Acoustic amplitude-doppler target ranging system
US6084372A (en) * 1998-12-29 2000-07-04 Schneider Automation Inc. Electronic gearing from/to non-zero follower motion with phase adjust
CN107782206A (en) * 2017-11-22 2018-03-09 中国工程物理研究院电子工程研究所 A kind of aerial guided bomb fuse and its environmental information recognition methods based on mems accelerometer
CN111457797A (en) * 2020-02-26 2020-07-28 北京理工大学重庆创新中心 Micro fuse safety control system and method based on event-driven architecture
CN111650402A (en) * 2020-05-14 2020-09-11 南京理工大学 Trajectory vertex identification method based on triaxial accelerometer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4409899A (en) * 1981-07-27 1983-10-18 The United States Of America As Represented By The Secretary Of The Air Force Acoustic amplitude-doppler target ranging system
US6084372A (en) * 1998-12-29 2000-07-04 Schneider Automation Inc. Electronic gearing from/to non-zero follower motion with phase adjust
CN107782206A (en) * 2017-11-22 2018-03-09 中国工程物理研究院电子工程研究所 A kind of aerial guided bomb fuse and its environmental information recognition methods based on mems accelerometer
CN111457797A (en) * 2020-02-26 2020-07-28 北京理工大学重庆创新中心 Micro fuse safety control system and method based on event-driven architecture
CN111650402A (en) * 2020-05-14 2020-09-11 南京理工大学 Trajectory vertex identification method based on triaxial accelerometer

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