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CN-116137374-B - Star-loaded active phased array antenna thermal control device and method

CN116137374BCN 116137374 BCN116137374 BCN 116137374BCN-116137374-B

Abstract

The invention relates to a satellite-borne active phased array antenna thermal control device and method, wherein the device comprises an antenna assembly, an active thermal control assembly, a temperature sensor, a controller and a satellite platform, wherein the antenna assembly comprises an antenna housing, an antenna subarray, a thermal control structure, a phase-change heat storage module and an antenna base plate, the thermal control structure comprises a working medium first inlet and a working medium first outlet, the phase-change heat storage module comprises a working medium second inlet and a working medium second outlet, the periphery of the phase-change heat storage module is provided with a thermochromic intelligent coating, the active thermal control assembly comprises a liquid storage tank, a driving pump, a valve, a flowmeter, a pressure meter, a temperature sensor and the controller, the antenna assembly is arranged on the satellite platform through the antenna base plate, and the active thermal control assembly is arranged in the satellite platform. The invention can automatically complete closed-loop temperature control according to the real-time high and low temperatures of the antenna, is particularly suitable for the star-loaded phased array antenna with high heat flux, and has the advantages of light weight while meeting the heat control requirement due to the integrated design of the heat control function and the antenna structure.

Inventors

  • HE LICHEN
  • HONG YUAN
  • YANG LIMING
  • LIU DAYONG

Assignees

  • 航天恒星科技有限公司

Dates

Publication Date
20260508
Application Date
20230315

Claims (6)

  1. 1. A star-loaded active phased array antenna thermal control device, comprising: The antenna assembly (1) comprises a radome (1-1), antenna subarrays (1-2), a thermal control structure (1-3), a phase-change heat storage module (1-4) and an antenna base plate (1-5) which are sequentially arranged, wherein the thermal control structure (1-3) comprises a working medium first inlet (1-3-1) and a working medium first outlet (1-3-2), the phase-change heat storage module (1-4) comprises a working medium second inlet (1-4-1) and a working medium second outlet (1-4-2), and a thermochromic intelligent coating (1-6) is arranged on the periphery of the phase-change heat storage module (1-4); The phase-change heat storage module (1-4) comprises a phase-change material layer (1-4-5) and a fluid layer (1-4-6), wherein the working medium second inlet (1-4-1) and the working medium second outlet (1-4-2) are both positioned on the fluid layer (1-4-6), and nn The thermochromic intelligent coating (1-6) is arranged on the periphery of the phase change material layer (1-4-5), and a multi-layer heat insulation component is arranged on the periphery of the fluid layer (1-4-6); The periphery of the thermal control structure (1-3) and the periphery of the antenna base plate (1-5) are respectively provided with a plurality of layers of heat insulation components, and the thermal control structure (1-3), the phase change heat storage module (1-4) and the antenna base plate (1-5) are respectively connected in a non-heat conduction way; The thermal control structure (1-3) comprises a plurality of thermal control structure lattice cells (1-3-3), the phase-change heat storage module (1-4) comprises a plurality of phase-change heat storage module lattice cells (1-4-4), and the thermal control structure lattice cells (1-3-3) and the phase-change heat storage module lattice cells (1-4-4) are tetrahedral, pyramid-shaped or Kagome-shaped lattice cells; The active thermal control assembly (2) comprises a liquid storage tank (2-1), a driving pump (2-2), a valve (2-3), a flowmeter (2-4), a pressure gauge (2-5), at least one temperature sensor (2-6) and a controller (2-7), wherein the controller (2-7) is connected with the driving pump (2-2) and the temperature sensor (2-6), and the temperature sensor (2-6) is connected to the antenna assembly (1); the thermal control working medium stored in the liquid storage tank (2-1) sequentially passes through the driving pump (2-2), the valve (2-3), the flowmeter (2-4), the pressure gauge (2-5), the working medium first inlet (1-3-1), the working medium first outlet (1-3-2), the working medium second inlet (1-4-1) and the working medium second outlet (1-4-2) to circulate to the liquid storage tank (2-1) to form a flow loop.
  2. 2. The star-loaded active phased array antenna thermal control device according to claim 1, characterized in that the antenna subarrays (1-2) are arranged on the thermal control structure (1-3), the phase-change heat storage module (1-4) is connected to the lower surface of the thermal control structure (1-3), and the antenna base plate (1-5) is connected to the lower surface of the phase-change heat storage module (1-4); The phase-change heat storage module (1-4) is a frame body, a hollow area is formed between the heat control structure (1-3) and the antenna base plate (1-5), in the hollow area, the working medium first inlet (1-3-1) is connected with an output pipeline of the active heat control assembly (2), the working medium first outlet (1-3-2) is connected with the working medium second inlet (1-4-1) through a pipeline, the working medium second outlet (1-4-2) is connected with an input pipeline of the active heat control assembly (2), and a through hole for each pipeline to pass through is formed in the antenna base plate (1-5).
  3. 3. A satellite-borne active phased array antenna thermal control device according to claim 1, characterized in that the antenna assembly (1) is mounted on a satellite platform (3) via the antenna base plates (1-5), the active thermal control assembly (2) being arranged within the satellite platform (3).
  4. 4. A satellite-borne phased-array antenna thermal control device according to claim 1, characterized in that the thermal control structure (1-3) has a plurality of fluid channels connected in parallel with each other inside the thermal control structure between the working medium first inlet (1-3-1) and the working medium first outlet (1-3-2).
  5. 5. The star-loaded active phased array antenna thermal control device according to claim 1, wherein the phase-change heat storage module (1-4) is further provided with a phase-change material filling port (1-4-3).
  6. 6. A method for thermally controlling a star-loaded active phased array antenna, using a star-loaded phased array antenna thermal control device according to any of claims 1-5, the method comprising: The temperature sensor (2-6) monitors the temperature of the antenna subarrays (1-2); When the temperature of the antenna subarray (1-2) is greater than a threshold value, the controller (2-7) controls the driving pump (2-2) to drive a thermal control working medium in the liquid storage tank (2-1) to circulate through the flow loop, wherein the thermal control working medium absorbs heat of the antenna subarray (1-2) in the circulation process, and the thermal control working medium transfers the heat to a phase change material in the phase change heat storage module (1-4) when passing through the phase change heat storage module (1-4), one part of heat is stored by the phase change material, and the other part of heat is emitted by the thermochromic intelligent coating (1-6); When the temperature of the antenna subarray (1-2) is smaller than a threshold value, the controller (2-7) controls the driving pump (2-2) to drive the thermal control working medium in the liquid storage tank (2-1) to circulate through the flow loop, wherein the thermal control working medium is used for transferring heat stored by the phase change material in the phase change heat storage module (1-4) to the thermal control working medium at least partially when passing through the phase change heat storage module (1-4), and the thermal control working medium is used for transferring heat to the antenna subarray (1-2) when circulating.

Description

Star-loaded active phased array antenna thermal control device and method Technical Field The invention relates to the technical field of aerospace, in particular to a thermal control device and method for a star-loaded active phased array antenna. Background The active phased array antenna has the advantages of flexible and controllable beam pointing, high reliability and the like, and becomes an important trend of antenna development in the future. The satellite-borne active phased array antenna is used as a satellite payload, the space thermal environment where the satellite-borne active phased array antenna is located during in-orbit working is extremely bad, the satellite-borne active phased array antenna is not only influenced by solar direct radiation, earth albedo radiation, earth infrared radiation and other space external heat flows, but also confronts the influence of low temperature of space near 4K and frequent cold-hot alternation in and out of an earth illumination area and a shadow area, the temperature change is extremely severe, in addition, the antenna integration level is improved and the performance is improved, so that the layout of components with large power consumption is dense, the instantaneous heat consumption of the antenna is large, the heat is concentrated, the local heat flow density is high, and the heat dissipation is difficult. The lack of thermal control measures will seriously affect the normal operation of the antenna on-orbit. Generally, a space-borne phased array antenna adopts a heat pipe-based method for heat control, and specifically comprises a heat pipe, a radiation radiator, an electric heater, a heat control coating and a multi-layer heat insulation assembly. However, the heat pipe-based thermal control method is only applicable to occasions with low heat flux density (heat flux density <10W/cm 2). For a satellite-borne millimeter wave active phased array antenna, the typical characteristic is high-density integration, for example, the space between array elements (taking about half wavelength) is only 5mm calculated by Ka frequency band 30GHz, and the heat flux density of the active devices with high power such as successful amplification and low noise amplification in such a small space set can easily break through 10W/cm 2. Thus, other more efficient thermal control methods are needed to ensure that the antenna is at a reasonable temperature level. Disclosure of Invention In view of this, the present invention aims to provide a thermal control device and method for a star-loaded phased array antenna, which solves the problem that the current thermal control method cannot be applied to a scene with higher heat flux density. According to the first embodiment of the invention, a star-loaded active phased array antenna thermal control device is provided, which comprises an antenna assembly, an antenna housing, an antenna subarray, a thermal control structure, a phase-change heat storage module and an antenna base plate, wherein the antenna housing, the antenna subarray, the thermal control structure, the phase-change heat storage module and the antenna base plate are sequentially arranged, the thermal control structure comprises a working medium first inlet and a working medium first outlet, the phase-change heat storage module comprises a working medium second inlet and a working medium second outlet, a thermochromic intelligent coating is arranged on the periphery of the phase-change heat storage module, the active thermal control assembly comprises a liquid storage tank, a driving pump, a valve, a flowmeter, a pressure gauge, at least one temperature sensor and a controller, the controller is connected with the driving pump and the temperature sensor, the temperature sensor is connected to the antenna assembly, and a thermal control working medium stored in the liquid storage tank sequentially circulates to the liquid storage tank through the driving pump, the valve, the flowmeter, the pressure gauge, the working medium first inlet, the working medium first outlet, the working medium second inlet and the working medium second outlet to form a flowing loop. The antenna subarray is arranged on the heat control structure, the phase-change heat storage module is connected to the lower surface of the heat control structure, the antenna base plate is connected to the lower surface of the phase-change heat storage module, the phase-change heat storage module is a frame body, a hollow area is formed between the heat control structure and the antenna base plate, in the hollow area, the working medium first inlet is connected with an output pipeline of the active heat control assembly, the working medium first outlet is connected with a working medium second inlet through a pipeline, the working medium second outlet is connected with an input pipeline of the active heat control assembly, and a through hole for each pipeline to pass through is formed in the antenna base