A power control method for airborne laser temperature control system

Abstract

The present invention relates to the field of laser technology, and discloses a power control method for an airborne laser temperature control system, comprising collecting the temperatures of a plurality of temperature-controlled objects at regular intervals, calculating the difference between the temperature of the temperature-controlled objects and the target temperature, and calculating a standard power based on the difference. The standard power is then multiplied by a weighting factor to calculate a weighted product. A difference threshold is set. If the absolute value of the difference is greater than the absolute value of the difference threshold, the weighting factor is increased by 1; if the absolute value of the difference is not greater than the absolute value of the difference threshold, the weighting factor is set to 1. The weighted power is calculated. If the standard power is greater than the weighted power, the actual power is equal to the weighted power; if the standard power is not greater than the weighted power, the actual power is equal to the standard power. By introducing a weighting factor, the present invention achieves dynamic control of the system power, allocating more power to temperature control units with larger controlled temperature differences, thereby shortening the adjustment time.

Description

Technical Field

[0001] The present invention relates to the technical field of lasers, and in particular to a power control method for an airborne laser temperature control system. Background Art

[0002] The power distribution of the power supply system in the integrated design of airborne lasers faces multiple challenges. First, due to the limited installation space within the aircraft, the total laser power is strictly capped. Second, during rapid climbs or dives, the ambient temperature can fluctuate dramatically within a short period of time (typically up to ±30°C / minute), placing a severe strain on the temperature control of the precision components within the laser cavity. When faced with such extreme temperature fluctuations, the instantaneous total power consumption of the temperature control system can easily exceed the power supply system's safety threshold. Without a dynamic power scheduling mechanism, the response rate of each temperature control unit will decrease due to insufficient power supply, and the precision components will be affected by cold or heat for a longer period of time, ultimately leading to the risk of thermal failure of core components. Experimental data shows that when the temperature control delay exceeds 120 seconds, the positioning accuracy of the inertial navigation unit deteriorates by up to 300%, and the calibration failure rate of optical sensors increases to 17 times the baseline value after experiencing an uncontrolled temperature fluctuation of 5°C / minute. Summary of the Invention

[0003] Based on the above, the purpose of the present invention is to provide a power control method for an airborne laser temperature control system, optimize the distribution of the total power of the temperature control system, and shorten the total time for multiple precision components in the laser cavity to reach a constant temperature state.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A method for controlling the power of an airborne laser temperature control system comprises the following steps:

[0006] S1. Collect the temperature of n temperature-controlled objects once every t time interval, where n is a positive integer not less than 2;

[0007] S2. Calculate the difference between the temperature of the controlled object and the target temperature, denoted as Δ temp1 , Δ temp2 ,...,Δ tempn ;

[0008] S3, according to Δ tempx Calculate the standard power W1, W2, ..., W n , where x is a positive integer and 1≤x≤n;

[0009] S4. Calculate weighted product M x , M x =W x ×T x, where T is a positive integer with an initial value of 1;

[0010] S5. Set the difference threshold between the temperature of the temperature-controlled object and the target temperature as temp. th ;

[0011] S6, comparison Δ tempx The absolute value of temp th The absolute value of Δ tempx >temp th , then T x =T x +1; if Δ tempx ≤temp th , then T x =1;

[0012] S7. Calculate weighted power P x , , where V is the total power of the temperature control system;

[0013] S8. Compare standard power W x With weighted power P x The size of W x >P x , then the actual power V x =P x If W x ≤P x , then the actual power V x =W x .

[0014] As a preferred solution for the power control method of an airborne laser temperature control system, the method further includes the following subdivision steps:

[0015] S3-1. Record the difference between the last temperature of the temperature-controlled object and the target temperature, which is recorded as Δ last1 , Δ last2 ,...,Δ lastn ;

[0016] S3-2, accumulate the difference between the temperature of all temperature-controlled objects and the target temperature recorded after the operation, and record it as S tenp1 、S temp2 ,...,S tempn ;

[0017] S3-3. Calculate standard power W x ,

[0018] W x =a×Δ tempx +b×S temp +c×(Δ tempx -Δ lastx), where a, b, and c are system parameters adjusted according to the system.

[0019] The beneficial effects of the present invention are:

[0020] The present invention collects the temperatures of multiple temperature-controlled objects at regular intervals, calculates the difference between the temperature of the temperature-controlled object and the target temperature, and calculates the standard power based on the difference. The standard power is then multiplied by a weighting factor to calculate the weighted product. A difference threshold between the temperature of the temperature-controlled object and the target temperature is set, and the absolute value of the difference is compared with the absolute value of the difference threshold. If the difference is greater than the difference threshold, the weighting factor is increased by 1; if the difference is not greater than the difference threshold, the weighting factor is set to 1. The weighted power is calculated, and the standard power is compared with the weighted power. If the standard power is greater than the weighted power, the actual power is equal to the weighted power; if the standard power is not greater than the weighted power, the actual power is equal to the standard power. By introducing a weighting factor, the present invention realizes dynamic regulation of system power, allocating more power to temperature control units with larger controlled temperature differences to shorten the adjustment time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0022] Figure 1 This is a flow chart of a power control method for an airborne laser temperature control system provided by a specific embodiment of the present invention;

[0023] Figure 2 It is a detailed flow chart of a power control method for an airborne laser temperature control system provided by a specific embodiment of the present invention. DETAILED DESCRIPTION

[0024] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] like Figure 1 As shown, this embodiment provides a power control method for an airborne laser temperature control system, the method comprising the following steps:

[0026] S1. The temperature of n temperature-controlled objects is collected once every t time interval, where n is a positive integer not less than 2. Specifically, in this embodiment, four different temperature-controlled objects are taken as an example, that is, n=4. At the same time, for the sake of exemplary description, the t time interval in this embodiment is 1ms. During the climb of the aircraft, the temperature in the cabin drops rapidly. For example, the ambient temperature of the laser is -10°C at this time, and the four temperature-controlled objects all need to be kept at a constant temperature of 25°C. However, because the temperature adjustment takes time, and the volume, weight and specific heat capacity of the four temperature-controlled objects themselves are different, the temperature of the four temperature-controlled objects themselves will be higher than the ambient temperature. Assume that the actual temperatures of the four temperature-controlled objects are 0°C, 5°C, 10°C and 15°C respectively.

[0027] S2. Calculate the difference between the temperature of the controlled object and the target temperature, denoted as Δ temp1 , Δ temp2 ,...,Δ tempn At this time Δ temp1 =-25℃; Δ temp2 =-20℃; Δ temp3 =-15℃; Δ temp4 =-10℃.

[0028] S3, according to Δ tempx Calculate the standard power W1, W2, ..., W n , where x is a positive integer and 1≤x≤n. Calculate the standard power, W, using the following formula: X =a×Δ tempx , where a is a system parameter.

[0029] S4. Calculate weighted product M x , M x =W x ×T x , where T is a positive integer with an initial value of 1. Initially, M1=W1×1, M2=W2×1, M3=W3×1, and M4=W4×1.

[0030] S5. Set the difference threshold between the temperature of the temperature-controlled object and the target temperature as temp. th Specifically, in this embodiment, temp th is 0.1℃.

[0031] S6, comparison Δ tempx The absolute value of temp th The absolute value of Δ tempx >temp th , then T x =T x +1; if Δ tempx ≤temp th , then Tx =1. The system makes a judgment every 1ms. Assume that after 1s, the absolute value of the difference between the temperature of the controlled object and the target temperature is less than the difference threshold temp for the first time. th Before this, the weighting factors have been accumulated, that is,

[0032] At 1ms, T1=1, T2=1, T3=1, T4=1;

[0033] At 2ms, T1=2, T2=2, T3=2, T4=2; ......

[0034] At 999ms, T1=999, T2=999, T3=999, T4=999;

[0035] At 1s, the absolute value of the difference between the temperature of the controlled object and the target temperature is less than the difference

[0036] Value threshold temp th Specifically, the absolute value of the difference between the temperature of the third controlled object and the target temperature is less than the difference threshold temp th , then T1=1000, T2=1000, T3=1, T4=1000;

[0037] S7. Calculate weighted power P x , , where V is the total power of the temperature control system; in this embodiment, the total system power V=1000W, and the four controlled objects are in Δ temp1 =-25℃; Δ temp2 =-20℃; Δ temp3 =-15℃; Δ temp4 = -10℃, the required temperature control power is 500W, 400W, 300W and 200W respectively. Under this condition, the total standard power required for temperature control exceeds the total system power.

[0038] S8. Compare standard power W x With weighted power P x The size of W x >P x , then the actual power V x =P x If W x ≤P x , then the actual power V x =W x Under the above conditions, P1=357.1W, P2=285.7W, P3=214.2W, P4=142.8W. That is, before 999ms, W x >P x, the actual power V of the thermostat of each controlled object x =P x But at 1s, the absolute value of the difference between the temperature of the third controlled object and the target temperature is less than the difference threshold temp th , so that T3 = 1. On this basis, the weights of the weighted power change, P1 = 454.4W, P2 = 363.5W, P3 = 0.27W, P4 = 181.7W.

[0039] Furthermore, the temperature difference between the actual temperature of the first, second and fourth controlled objects and the target temperature decreases, and the temperature difference between the actual temperature of the third controlled object and the target temperature increases, causing the weighting factor to accumulate again. However, during the change process, the system power is always applied to other controlled objects to quickly reduce the temperature difference until the absolute value of the difference between the temperature of a controlled object and the target temperature is less than the difference threshold temp again. th After this, the weights change again, and thermostats that have not yet reached the difference threshold are given higher weights to further quickly narrow the temperature difference, shorten the time that precision components are affected by cold / heat, and reduce the risk of thermal failure of core components.

[0040] like Figure 2 As shown, the power control method of the airborne temperature control unit provided in this embodiment is basically the same as that in the first embodiment, with only some steps being different. This embodiment only describes the steps that are different from the first embodiment.

[0041] It also includes the following subdivision steps:

[0042] S3-1. Record the difference between the last temperature of the temperature-controlled object and the target temperature, which is recorded as Δ last1 , Δ last2 ,...,Δ lastn ;

[0043] S3-2, accumulate the difference between the temperature of all temperature-controlled objects and the target temperature recorded after the operation, and record it as S tenp1 、S temp2 ,...,S tempn ;

[0044] S3-3. Calculate standard power W x ,

[0045] W x =a×Δ tempx +b×S temp +c×(Δ tempx -Δ lastx ), where a, b, and c are system parameters adjusted according to the system.

[0046] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

[0047] In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0048] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

Claims

1. A power control method for an airborne laser temperature control system, characterized in that: The following steps are involved: S1. Collect the temperature of n temperature-controlled objects once every t time interval, where n is a positive integer not less than 2; S2. Calculate the difference between the temperature of the controlled object and the target temperature, denoted as Δ temp1 , Δ temp2 ,...,Δ tempn ; S3, according to Δ tempx Calculate the standard power W1, W2, ..., W n , where x is a positive integer and 1≤x≤n; record the difference between the last temperature of the controlled object and the target temperature, denoted as Δ last1 , Δ last2 ,...,Δ lastn ; The difference between the temperature of all temperature-controlled objects and the target temperature recorded after the operation is accumulated and recorded as S temp1 、S temp2 ,...,S tempn ; Calculate standard power W x , W X =a×Δ tempx +b×S temp +c×(Δ tempx -Δ lastx ), where a, b, and c are system parameters adjusted according to the system; S4. Calculate weighted product M x , M x =W x ×T x , where T is a positive integer with an initial value of 1; S5. Set the difference threshold between the temperature of the temperature-controlled object and the target temperature as temp. th ; S6, comparison Δ tempx The absolute value of temp th The absolute value of Δ tempx >temp th , then T x =T x +1; if Δ tempx ≤temp th , then T x =1; S7. Calculate weighted power P x , Where V is the total power of the temperature control system; S8. Compare standard power W x With weighted power P x The size of W x >P x , then the actual power V x =P x If W x ≤P x , then the actual power V x =W x .

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