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Control method of graphite heater

A graphite heater and control method technology, applied in the direction of ohmic resistance heating, heating element materials, ohmic resistance heating parts, etc., can solve problems such as unproposed solutions, achieve the effect of increasing accuracy and reducing control deviation

Active Publication Date: 2018-08-17
BEIJING INST OF STRUCTURE & ENVIRONMENT ENG +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] For the above problems, no effective solution has been proposed

Method used

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  • Control method of graphite heater
  • Control method of graphite heater
  • Control method of graphite heater

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Experimental program
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Embodiment

[0028] In combination with the present invention figure 1 and 2 As shown, the present invention provides a control method for a graphite heater. include:

[0029] S102: applying a predetermined voltage to the graphite heater, wherein the voltage value of the predetermined voltage is fixed;

[0030] S104: From the first time when the predetermined voltage is applied, perform the following operations: measure the heat transmitted by the graphite heater through a heat flow sensor; The heating control curve is used to perform closed-loop control on the graphite heater.

[0031] Wherein the first time is the time when the graphite heater starts to respond linearly to the applied voltage.

[0032] Reference attached Figure 4 As shown, in the graphite heating control curve under the traditional method, the thermal inertia of the material itself is large in the hot start stage, the hysteresis phenomenon is serious, the response to the input voltage is slow, and the thermal load ...

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PUM

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Abstract

The invention provides a control method of a graphite heater. The control method includes: applying a predetermined voltage to a graphite heater, wherein a voltage value of the predetermined voltage is fixed; starting from a first time after applying the predetermined voltage, performing the operation of: measuring heat transferred by the graphite heater by a heat flow sensor; and performing closed-loop control on the graphite heater based on the measured value of the heat flow sensor and a heating control curve corrected by the first time, wherein the first time is the time when the graphiteheater starts to make a linear response to the applied voltage.

Description

technical field [0001] The invention relates to a method for heating a test piece, in particular to a method for controlling a graphite heater. Background technique [0002] Research on near-space vehicles is an important direction of aerospace development. The aircraft uses ramjet engines and rocket engines to fly at the edge of the atmosphere close to space. Its main feature is hypersonic speed (Ma>5) and serious aerodynamic heating of the structure. Aircraft will face harsh environments such as low oxygen and high temperature during flight, which puts forward higher requirements for thermal protection system and structural design. Through the ground test, simulating the thermal load environment in the low-oxygen state during the flight process, and reproducing the temperature, stress and deformation state in the structure at each time, has an important role and significance in evaluating the thermal protection system and structural design. [0003] The heating capacit...

Claims

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Application Information

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IPC IPC(8): H05B1/02H05B3/14H05B3/02
CPCH05B1/02H05B3/02H05B3/145
Inventor 田玉坤何钦华刘佳刘永清姚斌郝逍然刘鹏乔通
Owner BEIJING INST OF STRUCTURE & ENVIRONMENT ENG
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