Task-oriented Comprehensive Threat Level Quantification Method and System

Abstract

The present invention belongs to the technical field of mission comprehensive threat assessment, and particularly relates to a mission-oriented comprehensive threat degree quantification method and system. According to the mission effectiveness evaluation requirements, an environmental comprehensive cost model is constructed. Among them, the types of environmental comprehensive costs in this model at least include: the threat degree cost related to the performance of the mission executor itself; solving the environmental comprehensive cost model, and quantifying the comprehensive threat degree during mission execution by analyzing the growth rate of the comprehensive threat degree cost. The present invention uses the spatio-temporal comprehensive threat cost as the mission effectiveness evaluation index, can comprehensively and reasonably evaluate the mission effectiveness, so as to achieve the purpose of scientifically, effectively and reasonably formulating and selecting corresponding strategies during mission execution, has high analysis efficiency, and has good application prospects.

Description

Technical Field

[0001] The present invention belongs to the technical field of mobile mission execution evaluation, and particularly relates to a method and system for quantifying the comprehensive threat degree for a mission. Background Art

[0002] In a specific domain, a mission refers to a single-stage action in the physical space. A mission is a broad concept. It is an ordered set of a series of interrelated actions carried out by an action unit to fulfill the responsibilities assumed or achieve a specific purpose under certain environmental, temporal, and spatial constraints, including actions in multiple stages in the physical space and non-physical space, as well as the association and coordination between stages. There are mutual influences or dependencies between the actions of each stage. It is a complex combination. In addition to the basic environmental impact, more importantly, it is the ingenious strategy. The evaluation of the impact of the environment on a mission cannot only focus on the environment. In fact, in addition to the environment, the execution of a mission is also affected by the situation and the capabilities of both sides during the mission implementation. Even in some cases, the situation and capability factors are the main reasons. When analyzing the current state and development trend of a mobile mission, it mainly includes two parts: situation assessment and threat assessment. The quantitative or qualitative description of the enemy, ourselves, friends, and events is the basis of situation expression. As a factor that cannot be ignored in affecting mission execution, capability plays a relatively important role in the task-oriented environmental analysis. In the process of evaluating the impact of the environment on a mission, fully considering the capability factor is the key to the scientific and targeted evaluation method. The evaluation that ignores the capability factor cannot reflect the real environmental impact. Moreover, factors such as the situation, capability, and environment are all changing continuously or suddenly over time. The static research method cannot reflect the real impact of the dynamic environment on the mission. Time is the only parameter running through these changes. Therefore, the environment, situation, and capability can all be regarded as a complex time-related function. The basis of the spatio-temporal environmental impact effectiveness evaluation for a mission is to be able to reasonably and scientifically understand and know the law of the generation and accumulation of costs or benefits during the mission execution process. Specifically, it is to study the law of the generation and accumulation of costs during the mission execution process under the influence of the environment and other factors, measure the threat degree faced during the mission execution process, and finally form an environmental comprehensive impact model that can evaluate the costs of known solutions and compare the advantages and disadvantages of each solution, so as to formulate the mission execution strategy more accurately. However, the traditional algorithms mainly focus on the costs accumulated with the spatial activities, and cannot comprehensively analyze the threats faced during the mission execution process, thus affecting the selection of the mission execution strategy. Summary of the Invention

[0003] Therefore, the present invention provides a method and system for quantifying the comprehensive threat degree for a mission. By using the spatio-temporal comprehensive threat cost as the mission effectiveness evaluation index, it can more comprehensively and reasonably evaluate the mission effectiveness, so as to achieve the purpose of scientifically, reasonably, and effectively formulating and selecting corresponding strategies during the mission execution, with high efficiency and being convenient for practical scenario application.

[0004] According to the design solution provided by the present invention, a method for quantifying the comprehensive threat degree for tasks is provided, including:

[0005] Based on the requirements of task effectiveness evaluation, an environmental comprehensive cost model is constructed, where the environmental comprehensive cost of the model at least includes: the threat degree cost related to the performance of the task executor himself;

[0006] Solve the environmental comprehensive cost model, and quantify the comprehensive threat degree during task execution by analyzing the growth rate of the comprehensive threat degree cost.

[0007] As the method for quantifying the comprehensive threat degree for tasks of the present invention, further, the threat degree cost is the overall threat degree of the task executor himself in terms of risk, consumption and reliability during task execution under the influence of environment, ability and situation.

[0008] As the method for quantifying the comprehensive threat degree for tasks of the present invention, further, in the analysis of the threat degree cost, according to the types that accumulate respectively in time and space, the threat quantity is divided into a time-accumulative threat quantity and a space-accumulative threat quantity.

[0009] As the method for quantifying the comprehensive threat degree for tasks of the present invention, further, the time-accumulative threat quantity and the space-accumulative threat quantity are uniformly described in vector form; the corresponding time threat rate and space threat rate for characterizing the growth law of the threat cost are obtained through the time-accumulative threat quantity and the space-accumulative threat quantity.

[0010] As the method for quantifying the comprehensive threat degree for tasks of the present invention, further, dimensionless processing is performed on the time-accumulative threat quantity and the space-accumulative threat quantity, and a weight vector is set numerically to obtain a geometric comprehensive threat quantity; and the spatio-temporal growth rate of the comprehensive threat quantity is used to quantify the comprehensive threat degree; wherein, according to different threat types, the spatio-temporal growth rate is divided into a time-accumulative growth rate and a space-accumulative growth rate.

[0011] As the method for quantifying the comprehensive threat degree for tasks of the present invention, further, the time-accumulative growth rate includes: the concealment threat rate obtained by using the line-of-sight rate as a benefit-type index, the execution ability threat rate obtained by using the line-of-sight rate as a cost-type index, the spatio-temporal reliability threat rate obtained by using the time tolerance ability, and the avoidance ability threat rate obtained by using the time avoidance risk; the space-accumulative growth rate includes: the economic threat rate obtained by using the driving speed as an intermediate-type index, the spatio-temporal reliability threat rate obtained by using the space tolerance ability, the avoidance ability threat rate obtained by using the space avoidance risk, and the risk threat rate obtained by using the low-speed risk under the maneuverability ability as a benefit-type index.

[0012] As the task-oriented comprehensive threat degree quantification method of the present invention, further, a weight vector is obtained by experience; and based on the weight vector, the comprehensive threat degree during task execution is quantified through quantitative calculation.

[0013] Further, the present invention also provides a task-oriented comprehensive threat degree quantification system, including: a cost classification module and a quantitative analysis module, wherein,

[0014] The cost classification module is used to construct the types of comprehensive environmental costs according to the requirements of task effectiveness evaluation. Among them, the types of comprehensive environmental costs in this model at least include: the threat degree cost related to the performance of the task executor itself;

[0015] The quantitative analysis module is used to solve the comprehensive environmental cost model and quantify the comprehensive threat degree during task execution by analyzing the growth rate of the comprehensive threat degree cost.

[0016] The beneficial effects of the present invention:

[0017] The present invention establishes the comprehensive threat degree cost related to the best performance according to the requirements of task effectiveness evaluation. By simulating and analyzing the law of the growth of its comprehensive threat cost, it is then possible to use quantitative analysis to quantify the comprehensive threat degree related to concealment, firepower ability, economic consumption, task reliability, and various risks during task execution, facilitating the use of the quantified comprehensive threat degree as an index for task effectiveness evaluation, and conducting a more comprehensive and reasonable task effectiveness evaluation, so as to achieve the purpose of scientifically, reasonably, and effectively formulating and selecting corresponding strategies during task execution, improving the efficiency of task environment effectiveness evaluation, and having a good application prospect. Description of the Drawings

[0018] Figure 1 Schematic diagram of the task-oriented comprehensive threat degree quantification process in the embodiment;

[0019] Figure 2 Schematic diagram of the spatio-temporal prism and spatio-temporal reliability risk of the cross-country activity in the embodiment;

[0020] Figure 3 Schematic diagram of the spatio-temporal prism of dangerous escape in the embodiment;

[0021] Figure 4 Schematic diagram of each spatio-temporal region affected by risk events in the embodiment. Detailed Embodiment

[0022] To make the purpose, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with the drawings and technical solutions.

[0023] An embodiment of the present invention provides a task-oriented comprehensive threat degree quantification method. Refer to Figure 1As shown in the figure, it includes:

[0024] S101. According to the requirements of mission effectiveness evaluation, construct the types of comprehensive environmental costs. Among them, the types of comprehensive environmental costs of this model at least include: the threat degree cost related to the performance of the mission executor himself;

[0025] S102. Solve the comprehensive environmental cost model, and quantify the comprehensive threat degree in mission execution by analyzing the growth rate of the comprehensive threat degree cost.

[0026] Establish the comprehensive threat degree cost related to the best performance according to the requirements of mission effectiveness evaluation. Through the simulation analysis of the law of the growth of the comprehensive threat cost, it is possible to quantitatively analyze the comprehensive threat degree related to concealment, firepower ability, economic consumption, mission reliability and various risks in the process of mission execution. It is convenient to use the quantified comprehensive threat degree as an index for mission effectiveness evaluation, and conduct mission effectiveness evaluation more comprehensively and reasonably, so as to achieve the purpose of scientifically and effectively formulating and selecting corresponding strategies in mission execution, with high efficiency and convenient for actual scenario application.

[0027] As the method for quantifying the comprehensive threat degree oriented to missions in the embodiments of the present invention, further, the threat degree cost is the overall threat degree of the mission executor himself in terms of risks, consumption and reliability during the mission execution under the influence of the environment, ability and situation.

[0028] Different from the traditional cost model based on spatial GIS, in the embodiments of this case, the growth rate of the spatio-temporal cost of the mission is represented by using the law of the occurrence and growth of the cost over time and space during the mission execution. Theoretically, it is a continuous spatio-temporal field model. The growth rate of the spatio-temporal comprehensive cost of the mission also comes from the objective impact analysis of the spatio-temporal environment. Each mission effectiveness evaluation index requires several kinds of mission spatio-temporal comprehensive costs as support, and each spatio-temporal comprehensive cost corresponds to multiple mission effectiveness evaluation objectives. For example, for multiple effectiveness indexes of a cross-country mission under the influence of the environment, it can include evaluating the shortest arrival time of the cross-country mission, predicting the avoidance spatio-temporal area formed by the environment and situation, the reachable spatio-temporal domain range of the cross-country mission activities, the minimum comprehensive cost of the cross-country mission, etc., so as to form a multi-level and multi-angle evaluation of the mission.

[0029] Each type of comprehensive environmental cost is affected by various objective environmental factors. For example, the comprehensive threat degree cost is related to concealment, firepower ability, economic consumption, mission reliability and various risks during the progress. The influence of the comprehensive threat degree cost is relatively fuzzy. When calculating, it is necessary to pay attention to the comparison degree of the importance of multiple factors. Therefore, methods such as the fuzzy comprehensive decision-making method, the analytic hierarchy process, and the simple weighting method can be used for quantitative calculation. Through the simulation calculation of the above-mentioned law of the growth of the mission comprehensive cost, the quantitative analysis of the comprehensive threat degree in mission execution can be realized.

[0030] As the task-oriented comprehensive threat level quantification method in the embodiments of the present invention, further, in the threat level cost analysis, according to the types of accumulation that occur separately in terms of time and space, the threat quantity is divided into a time-accumulative threat quantity and a space-accumulative threat quantity. Further, both are uniformly described in vector form; the corresponding time threat rate and space threat rate for characterizing the threat cost growth law are obtained through the time-accumulative threat quantity and the space-accumulative threat quantity.

[0031] "Comprehensive threat level" refers to the overall threat level to various aspects such as concealment, firepower ability, risk, consumption, and reliability during the task execution, which is caused by the environment, situation, ability, and other relevant factors when performing the task. The comprehensive threat level cost is an important basis for comprehensively optimizing the task route.

[0032] The threat quantity refers to the degree of threat to the completion of the task affected by factors such as the environment and situation during the task execution. The threat quantity is a cost value, a scalar, with additivity and cumulativity. The threat quantities that accumulate separately over time and space are called the time-accumulative threat quantity and the space-accumulative threat quantity. The threat quantity occurring in a unit space may be related to the direction of the task bearer's activities in space, so it may be a space vector or a scalar; due to the unidirectionality of time, the threat quantity per unit time should be a scalar. However, for the sake of unified form, in the embodiments of this case, the scalar is regarded as a special isotropic vector and uniformly expressed in vector form. The total threat quantity can be described as: the sum of the products of the threat quantities generated by various environmental impacts in a unit time (or space) and time (or space). If in a relatively short off-road journey with little environmental change, there are m time-accumulative threats and n space-accumulative threats, for quantitative analysis of the threat level, the following variables can be defined:

[0033] (1) The total threat quantity W accumulated by the task affected by all environmental and situation factors;

[0034] (2) For the i-th time-accumulative threat, the threat quantity received by the task per unit time is The maximum possible threat quantity (scalar) that may be caused is

[0035] (3) For the j-th space-accumulative threat, the threat quantity received by the task per unit space is The maximum possible threat quantity (scalar) that may be caused in any space direction is

[0036] (4) This section of the journey is relatively short, with a time consumption of The travel length The environment hardly changes;

[0037] Obviously, the following relationship exists:

[0038]

[0039] Define to be the time and space threat rates of the corresponding threats respectively:

[0040]

[0041]

[0042] respectively represent the percentages of the threat amounts actually generated by the i-th time-accumulative threat and the j-th space-accumulative threat in the maximum threat amount that can be generated, that is, the degree of their environmental impact. Obviously

[0043] As the method for quantifying the comprehensive threat degree oriented to tasks in the embodiments of the present invention, further, the time-accumulative threat amount and the space-accumulative threat amount are dimensionless processed, and a weight vector is set numerically to obtain a geometric comprehensive threat amount; and the spatio-temporal growth rate of the comprehensive threat amount is used to quantify the comprehensive threat degree; wherein, according to different threat types, the spatio-temporal growth rate is divided into a time-accumulative growth rate and a space-accumulative growth rate. Further, the time-accumulative growth rate includes: the concealment threat rate obtained by using the line-of-sight rate as a beneficial index, the execution ability threat rate obtained by using the line-of-sight rate as a cost index, the spatio-temporal reliability threat rate obtained by using the time tolerance ability, and the avoidance ability threat rate obtained by using the time avoidance risk; the space-accumulative growth rate includes: the economic threat rate using the driving speed as an intermediate index, the spatio-temporal reliability threat rate obtained by using the space tolerance ability, the avoidance ability threat rate obtained by using the space avoidance risk, and the risk threat rate using the low-speed risk under the maneuverability ability as a beneficial index. Further, the weight vector is obtained by experience; and according to the weight vector and through quantitative calculation, the comprehensive threat degree in task execution is quantified.

[0044] Suppose W i Tmax , respectively represent the maximum threat amounts that the i-th time-accumulative threat and the j-th space-accumulative threat can cause to the task per unit time or space. However, due to the different dimensions of the calculation of various environmental threat amounts, it is difficult to directly compare different threats. From the perspective of task planning, the greater the impact that a certain environment may cause, the higher its importance in cost analysis, that is, the higher the relative weight. Although W i Tmax , represents the maximum threat amount, but it is in the same proportion as the weights of various environmental or situation threats. That is, assume that in W iTmax , After the dimensions of are unified, there must be a weight vector A (|A| = 1) and a constant k numerically such that the following formula holds.

[0045]

[0046] Therefore, the geometric mean comprehensive threat quantity D of the local invariant environment can be defined as:

[0047]

[0048] In the case of continuous environmental changes, the expression of the above geometric mean comprehensive threat quantity D is actually the differential form of the point P on the trajectory L in time and space. Since environmental changes will cause the threat rate m on A (including and and ) to change, and its specific value is related to the spatio-temporal position (x, y, t), driving direction d, historical trajectory L, and other auxiliary information. Which specific parameters are required needs to be analyzed specifically, and the formula can be expressed as: Define the spatio-temporal comprehensive threat rate as Since environmental changes will not cause the weight to change, the formula for the geometric mean comprehensive threat quantity in a changing environment can be expressed as an integral

[0049] The purpose of setting the comprehensive threat degree cost is to compare the threat degrees of performing tasks in different spatio-temporal environments, and the focus is on the comparative significance of different spatio-temporal. Since the numerical meaning of W is not very useful, and the dimensions of W i Tmax , are difficult to unify and the calculation is complex, while D can be evaluated through experience and can be used to compare the relative magnitudes of the threat degrees at different spatio-temporal locations. Therefore, in the embodiments of this case, D is used as the evaluation value of the comprehensive threat quantity cost, and correspondingly is the spatio-temporal growth rate of its cost, which is called the comprehensive threat degree cost rate.

[0050] The threats to the mission mainly come from the influences of different environments or situations. The growth effects of different environmental influences on the cost are different. Mainly there are four types from the influencing principles:

[0051] (1) Benefit type: Also known as the extremely large type, it means that the greater the environmental influence value, the higher the cost. For example, the higher the fuel consumption, the greater the economic cost;

[0052] (2) Cost type: Also known as the extremely small type or cost type, it means that the smaller the environmental influence value, the higher the cost. For example, the lower the ability to avoid danger, the higher the survival rate cost;

[0053] (3) Intermediate type: The closer the environmental impact value is to a certain intermediate value, the higher (or lower) the cost. For example, the closer the driving speed of a vehicle is to the economic fuel consumption speed, the lower the economic cost;

[0054] (4) Interval type: It is best when the environmental impact value is within a certain range. For example, if the vegetation canopy density is too high, it will affect visibility and reconnaissance, and if it is too low, it will affect concealment. It is just right at a certain level.

[0055] For the convenience of unified analysis of different impact types, in the embodiments of this case, all environmental impact values are unified into the same type, that is, all environmental impacts should be converted into cost types. Through the objective impact of the environment, analyze the spatio-temporal threat rates of the environment and the situation in several aspects such as concealment, firepower strike ability, fuel consumption, spatio-temporal reliability, and operation risk. At the same time, according to the cumulative principle of different threats, the corresponding spatio-temporal threat rates are divided into time-accumulative threat rates and space-accumulative threat rates.

[0056] Among them, the threat rate of visibility to concealment is a benefit-type index. The higher the visibility rate r (value range [0,1]), the lower the concealment, and the higher the concealment threat rate The higher it is. It is set that when the visibility rate is lower than k 1 , a lower visibility rate no longer significantly improves concealment. Then the concealment threat rate is calculated according to the following formula:

[0057]

[0058] Among them, the terrain visibility rate r is the ratio of the visible area to the total calculation area, which reflects the visibility performance of the observation perspective. This index may affect concealment and firepower capabilities, r = area visible / area all , area visible , area all are the visible area and the total calculation area in a single visibility domain calculation respectively, belongs to the time-accumulative threat rate.

[0059] The threat rate of visibility to firepower strike ability is a cost-type index. The higher the visibility rate r (value range [0,1]), the lower the threat rate of firepower exertion ability, and its cost is lower:

[0060]

[0061] The cost of firepower ability being restricted is related to the length of time staying in the high-threat rate area. Therefore it belongs to the time-accumulative threat rate.

[0062] The threat rate of driving speed v to fuel economy is an intermediate-type index. Denote the theoretical maximum speed of the vehicle as v' max, then the fuel economy threat rate

[0063]

[0064] Among them, during the vehicle driving process, generally there is a quadratic concave function relationship between the fuel consumption speed U and the driving speed V. When it is greater than or less than the economic speed, the fuel consumption will increase relatively fast. U max = max(c, a(v′ max ) 2 - bv′ max + c), a > 0, b > 0, and c is related to the international roughness index (m / km). The economic fuel speed of small highway vehicles is generally 80 - 90 km / h, a = 0.0013055, b = 0.21637. The threat rate of the driving distance to the fuel economy is always 1, and there is no problem of changing with the environment;

[0065]

[0066] and both belong to the space - cumulative threat rate.

[0067] How to express the influence range of risks is a seemingly simple but actually complex problem. Usually, the range of the environment or event that may cause damage can be marked in space, and at the same time, observe the position in space, calculate the distance from the relevant range to determine whether it is within the risk area, "how far" from the risk area, and whether it will be affected or involved by the relevant risks. However, in the real world, the "occurrence of risks" does not necessarily only refer to the spatial range of its occurrence, but may also include the limitation of the risk occurrence time.

[0068] The reliability risk analysis is mainly related to the activity range. See Figure 2 as shown. We start from P start to P endIn off-road activities, the possible spatio-temporal range that may occur is expressed by the spatio-temporal prism shown in the figure. If the task subject is within the spatio-temporal prism, theoretically, as long as the plan is reasonable, it is possible to complete the off-road task. However, due to the unpredictability of emergencies, it may lead to spatio-temporal tolerance risks. Since the spatio-temporal prism delimits the spatio-temporal range of our activities, that is, the time and space alternative ranges of each spatio-temporal point can be determined through the spatio-temporal prism, so as to analyze the spatio-temporal tolerance ability of each spatio-temporal point. In off-road operations, many types of risks will be encountered, some of which are extremely dangerous and may cause the task to fail, and such dangerous situations should be excluded from the itinerary plan. Except for a small number of environmental hazards that do not change with time, most hazards occur within a certain time period. Since any spatial movement takes time, not being within the dangerous spatio-temporal range at present does not mean that it will not be affected in the future. Through the escape boundary of the dangerous spatio-temporal range, the dangerous escape spatio-temporal prism is used to describe the problem of the spatio-temporal boundary that can just escape the danger with the existing ability.

[0069] See Figure 3 As shown, the structure of the dangerous escape spatio-temporal prism is mainly divided into three parts, which are defined in this article as the affected area, the occurrence area, and the vacuum area. Among them, the affected area: Although not affected at present in this spatio-temporal area, due to mobility problems, it will not be able to escape the upcoming danger in the future. This area is divided into an external area and an internal area by the lower pyramid. The time represented by the spatio-temporal points on the pyramid surface refers to the latest time when one should leave at the corresponding spatial point. If it is later than this point, it will surely not be able to escape the danger that "will occur" in the future. Occurrence area: The dangerous event is occurring in this spatio-temporal area. If this area is a regular figure, it will completely coincide with the dangerous spatio-temporal area. Vacuum area: If the task bearer is not affected by the dangerous event, it is impossible to reach this area; this area is divided into an external area and an internal area by the upper inverted pyramid. The danger in its internal area has disappeared, but due to the speed limit of movement, it is impossible to appear in this area without passing through the occurrence area.

[0070] Due to off-road ability limitations, the local spatio-temporal area that will definitely be affected by some kind of risk in the "future" should also be a type of "risk spatio-temporal area". Paying attention to this type of risk factor is particularly important for risk areas with extreme destructive effects. See Figure 4As shown in the figure, a spatio-temporal prism analysis of risk area escape is carried out for area A. The space-time can be divided into six types of regions. These six regions can divide the space-time around the risk event into a risk vacuum area, a risk affected area, a risk occurrence area, etc. Different types of regions have different characteristics of being affected by risks. Area A: The space-time region where the risk occurs. The task execution entity will be affected by the risk when it appears in this space-time. Area E: The space-time region affected by the risk. When the task execution entity appears in this space-time, although it will not be affected at the current time, it will definitely enter Area A and be affected in the future. Area F: The region where risks may occur. The task entity definitely has a chance to escape from the risk area with a reasonable path and speed. However, if it does not move or the moving path is unreasonable, it may also be affected by Area A. Area N: The risk vacuum area. The risk in this space-time region has disappeared, but due to the limitation of the moving speed, the task bearer who has not passed through Area A cannot appear in this region. Area B: The area with constant risk. The risk in this area does not disappear with time, and any entity appearing in this area at any time will be affected by the risk. Area C: The peripheral area of the risk. It is expected that no risk will occur in this area, but when the risk occurs, it may also face the risk of being affected. The closer the spatial distance to Area A or Area B, the greater the probability of being affected.

[0071] Due to possible emergencies, the planned time consumption at a certain spatio-temporal point is excessive, and due to the limitation of the upper interface of the spatio-temporal prism, there is not enough remaining time, which may lead to the risk of task failure. Therefore, the key to evaluating the time tolerance ability is to calculate how much time can be consumed at the investigated spatio-temporal point. Figure 2 In it, spatio-temporal point P 2 , assuming that there is no time tolerance risk when the spare duration is greater than t max , then the time tolerance ability E 2 of P T can be defined as:

[0072] Time tolerance ability E T (value range [0,1]) for the spatio-temporal reliability threat rate is a cost-type index: Among them, belongs to the time-accumulative threat rate.

[0073] Figure 2 In it, spatio-temporal point P 1 , if the space within its spatial radius r is used as the alternative space, then in the plane at time t 1 , a circle with radius r can be drawn with P 1 as the center. This circle will be divided by the spatio-temporal prism into part B inside and part A outside. Due to the range limitation of the spatio-temporal prism, part A cannot be reached, and only part B can be used as its effective alternative space. The size of B to a certain extent determines the space tolerance ability of this point. Therefore, if P1 The alternative space of P is defined as the space with a radius of r. 1 The space tolerance ability E of S can be defined as: the area S of the alternative space within the spatio-temporal prism during the activity of the task subject B and the total alternative space area S A+B The ratio, that is, E S = S B / S A+B .

[0074] The space tolerance ability E S (value range [0,1]) for the spatio-temporal reliability threat rate is a cost-type index: Among them, belongs to the space cumulative threat rate.

[0075] The time avoidance risk R T (value range [0,1]) for the avoidance ability threat rate is a benefit-type index:

[0076]

[0077] The space avoidance risk R S (value range [0,1]) for the avoidance ability threat rate is a benefit-type index:

[0078]

[0079] Among them, it is assumed that when the time distance and space distance from the spatio-temporal point to the escape spatio-temporal prism exceed t max and d max respectively, there is no avoidance risk. The actual spatio-temporal distances of a certain point are Δt and Δd respectively, then respectively belong to the time and space cumulative threat rates.

[0080] It is assumed that when the maximum feasible speed restricted by the environment is greater than , the low-speed risk can be ignored. The low-speed risk R of a certain environment M can be defined as being affected by n factors in the environment:

[0081]

[0082] v is the fastest driving speed allowed by the current spatio-temporal environment and its own ability. The low-speed risk R M is a benefit-type index of the risk threat rate . R M belongs to the space cumulative threat rate.

[0083]

[0084] Any kind of risk can be regarded as a constant function with a risk of 1. For example, for the i-th risk, its expression is:

[0085]

[0086] Then, among the n time cumulative risks (such as in the enemy's fire coverage area, in a harsh climate area), the threat rate of the i-th uniformly affecting risk:

[0087]

[0088] Among the m space cumulative risks (such as in a minefield, in a swamp area), the threat rate of the j-th uniformly affecting risk:

[0089]

[0090] The key to calculating D lies in calculating the weight vector A, which can be achieved through expert experience. There are many methods for calculating weights. In the embodiments of this case, the simple weighting method can be adopted. That is, only a certain number of experts need to be hired to directly give the weights according to experience for relevant issues, and then the average value of the weights of each factor is taken. Compared with other complex weight analysis methods (such as the analytic hierarchy process, TOPSIS method, etc.), this method is more affected by subjective factors and its performance is not stable enough. However, its biggest feature is simplicity and flexibility, and it is easy to adjust, which is very suitable for application scenarios where the weights often change, and this is beneficial for military tasks.

[0091] Furthermore, based on the above method, the embodiments of the present invention also provide a task-oriented comprehensive threat degree quantification system, including: a cost classification module and a quantitative analysis module, where

[0092] The cost classification module is used to construct an environmental comprehensive cost model according to the requirements of task effectiveness evaluation. Among them, the types of environmental comprehensive costs in this model at least include: the threat degree cost related to the performance of the task executor himself;

[0093] The quantitative analysis module is used to solve the environmental comprehensive cost model and quantify the comprehensive threat degree during task execution by analyzing the growth rate of the comprehensive threat degree cost.

[0094] Unless otherwise specifically stated, the relative steps, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of the present invention.

[0095] Based on the above system, the embodiments of the present invention also provide a server, including: one or more processors; a storage device for storing one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors implement the above method.

[0096] Based on the above system, an embodiment of the present invention further provides a computer-readable medium, on which a computer program is stored, wherein when the program is executed by a processor, the above method is implemented.

[0097] The device provided by the embodiment of the present invention has the same implementation principle and the same technical effects as those of the foregoing system embodiment. For the sake of brief description, for the parts not mentioned in the device embodiment, reference may be made to the corresponding contents in the foregoing system embodiment.

[0098] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described system and device can refer to the corresponding processes in the foregoing system embodiment, and will not be described herein again.

[0099] In all the examples shown and described herein, any specific values should be construed as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values.

[0100] It should be noted that like reference numerals and letters denote like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0101] The flowcharts and block diagrams in the figures illustrate the possible architectures, functions, and operations of systems, systems, and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the module, program segment, or part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than marked in the figures. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and the combinations of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0102] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and systems can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there can be other division methods in actual implementation. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some communication interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0103] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0104] If the above functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the systems described in each embodiment of the present invention. The foregoing storage medium includes: various media that can store program codes such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs.

[0105] Finally, it should be noted that the above-described embodiments are only specific implementation manners of the present invention, used to illustrate the technical solutions of the present invention, and are not intended to limit them. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes, or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A task-oriented comprehensive threat level quantification method, characterized in that, it includes the following contents: According to the requirements of task effectiveness evaluation, an environmental comprehensive cost model is constructed. Among them, the environmental comprehensive cost in this model at least includes: the threat level cost related to the performance of the task executor itself; in the analysis of the threat level cost, according to the types that accumulate respectively in terms of time and space, the threat quantity is divided into time-accumulative threat quantity and space-accumulative threat quantity. The time-accumulative threat quantity and the space-accumulative threat quantity are both described in vector form. The time threat rate and the space threat rate used to characterize the growth law of the threat cost are obtained by using the time-accumulative threat quantity and the space-accumulative threat quantity. The time-accumulative threat quantity and the space-accumulative threat quantity are dimensionless processed, and a weight vector is set numerically to obtain the geometric comprehensive threat quantity; and the spatio-temporal growth rate of the comprehensive threat quantity is used to quantify the comprehensive threat level; according to different threat types, the spatio-temporal growth rate is divided into time-accumulative growth rate and space-accumulative growth rate; Solve the environmental comprehensive cost model, and quantify the comprehensive threat level during task execution by analyzing the growth rate of the comprehensive threat level cost.

2. The task-oriented comprehensive threat level quantification method according to claim 1, characterized in that, the threat level cost is the overall threat level of the task executor itself in terms of risk, consumption and reliability during task execution under the influence of the environment, ability and situation.

3. The task-oriented comprehensive threat level quantification method according to claim 1, characterized in that, the time-accumulative growth rate includes: the concealment threat rate obtained by using the visibility rate as a benefit-type index, the execution ability threat rate obtained by using the visibility rate as a cost-type index, the spatio-temporal reliability threat rate obtained by using the time tolerance ability, and the avoidance ability threat rate obtained by using the time avoidance risk; the space-accumulative growth rate includes: the economic threat rate using the driving speed as an intermediate-type index, the spatio-temporal reliability threat rate obtained by using the space tolerance ability, the avoidance ability threat rate obtained by using the space avoidance risk, and the risk threat rate using the low-speed risk under the maneuverability ability as a benefit-type index.

4. The task-oriented comprehensive threat level quantification method according to claim 1, characterized in that, obtain the weight vector by experience; quantify the comprehensive threat level during task execution according to the weight vector and through quantitative calculation.

5. A task-oriented comprehensive threat level quantification system, characterized in that, it includes: a cost classification module and a quantitative analysis module, where, A cost classification module, which is used to construct a comprehensive environmental cost model according to the requirements of task effectiveness evaluation. Among them, the comprehensive environmental cost in this model at least includes: the threat degree cost related to the performance of the task executor itself; in the analysis of the threat degree cost, according to the types that accumulate respectively in terms of time and space, the threat quantity is divided into a time-accumulative threat quantity and a space-accumulative threat quantity. The time-accumulative threat quantity and the space-accumulative threat quantity are both described in a vector form. The time threat rate and the space threat rate used to characterize the growth law of the threat cost are obtained by using the time-accumulative threat quantity and the space-accumulative threat quantity. The time-accumulative threat quantity and the space-accumulative threat quantity are dimensionless processed, and a weight vector is set numerically to obtain a geometric comprehensive threat quantity; and the spatio-temporal growth rate of the comprehensive threat quantity is used to quantify the comprehensive threat degree; according to different threat types, the spatio-temporal growth rate is divided into a time-accumulative growth rate and a space-accumulative growth rate. A quantitative analysis module, which is used to quantify the comprehensive threat degree during task execution by solving the comprehensive environmental cost model and analyzing the growth rate of the comprehensive threat degree cost.

6. A computer-readable storage medium storing a computer program, which when executed by a processor causes the processor to execute the steps of the method according to any one of claims 1 to 4.

7. A computer device, including a memory and a processor, the memory stores a computer program, which when executed by the processor causes the processor to execute the steps of the method according to any one of claims 1 to 4.

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