Temperature Control Method of End Difference of U-shaped Frame
A frame and U-shaped technology, applied in the field of spacecraft thermal control, can solve the problems of increasing the cumulative error of original code and temperature conversion, increasing the computational burden of the on-board computer, etc., and achieve the effect of reducing the impact of cumulative error and saving computing work
Active Publication Date: 2017-06-06
SHANGHAI SATELLITE ENG INST
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Problems solved by technology
The traditional temperature control method not only increases the cumulative error caused by the original code and temperature conversion, but also requires a large number of conversion calculations for each temperature control, which increases the calculation burden of the on-board computer.
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[0041] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0042] In this embodiment, the end difference temperature control method for the U-shaped frame provided by the present invention, such as figure 1 As shown, the two ends of the U-shaped frame 1 are respectively pasted with electric heaters 2 to control the end difference of the U-shaped frame. Temperature T at the right end of the U-shaped frame 1 , the temperature T at the left end 2 . Requires the end difference of the U-shaped frame|T 1 -T 2 |
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The invention provides a method for controlling the temperature difference between the two ends of a U-shaped frame. The method comprises the steps of 1, obtaining the function of a temperature T and a true form N through deducing the functional relationship between the temperature T and the resistance R, the functional relationship between the resistance R and the voltage U, and the functional relationship between the voltage U and the true form N; 2, controlling the temperature difference between the two ends of the U-shaped frame through controlling the difference of the true form N. The temperature measurement at the two ends of the U-shaped frame is realized by means of an MF501 thermistor. According to the technical scheme of the invention, through controlling the difference between temperature-measurement true forms at the two ends of the U-shaped frame, the temperature difference between the two ends of the U-shaped frame can be controlled. In this way, the calculation operation of a spaceborne computer is greatly saved. Meanwhile, the cumulative error influence caused by the interconversion between temperature and true form can be reduced.
Description
technical field [0001] The invention relates to thermal control of a spacecraft, in particular to a method for controlling the temperature of a U-shaped frame by end difference. Background technique [0002] The U-shaped frame is an important part of the satellite antenna drive mechanism, and is mainly used for the installation of the motor in the mechanism. In the thermal control design of the drive mechanism, the temperature difference between the two ends of the U-shaped frame is usually required to be less than a certain temperature, that is, |ΔT|<C, so as to maintain the coaxiality of the motor bearing mounting hole, thereby ensuring the pointing accuracy of the drive mechanism. [0003] When the digital tube subsystem realizes the end difference temperature control of the U-shaped frame, it usually needs to switch between the original code N, the voltage U, the resistance R and the temperature T to realize the temperature difference temperature control. The traditi...
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IPC IPC(8): G05D23/24
Inventor 杜忠选陈菡翟载腾江世臣
Owner SHANGHAI SATELLITE ENG INST