A High-Precision Umbrella Antenna Profile Evaluation Method

Abstract

The invention discloses a high-precision umbrella antenna profile evaluation method, which belongs to the technical field of antennas. The method of the present invention is mainly divided into three steps: distributing the profile error of the high-precision umbrella antenna, dividing the profile error into design and manufacturing error, measurement error, profile expansion repetition error and thermal deformation error; analyzing the ground error of the antenna Calculation and evaluation, respectively calculating design and manufacturing errors, profile measurement errors, repeated expansion errors, and thermal deformation errors, to obtain the final ground profile accuracy of the antenna; to predict the antenna profile on orbit, and to test the antenna according to ground tests and finite element simulations. On-orbit profile predictions. The method of the invention distributes and calculates the precision of the antenna profile, obtains the precision of the antenna profile meeting the task index, and at the same time, can guide the assembly and debugging of the antenna on the ground and the prediction of the profile on the track. Profile accuracy is an important index for evaluating antennas. This method can be used to evaluate the profile of high-precision umbrella antennas, which has important application value.

Description

technical field [0001] The invention relates to a high-precision umbrella antenna profile evaluation method, which belongs to the technical field of antennas. Background technique [0002] Due to the continuous advancement of aerospace science and technology, space activities such as manned spaceflight and deep space exploration have put forward higher requirements for spaceborne antenna reflectors, such as larger diameter, high surface accuracy, high storage ratio, and lighter weight. At present, the application of large space-borne mesh antennas is becoming more and more extensive, and the profile accuracy has become one of the important indicators for evaluating antenna performance. However, the profile evaluation method of mesh antennas only considers the design and manufacturing errors on the ground. There is no unified evaluation standard for error, repeated deployment error, thermal deformation error and on-orbit surface prediction. [0003] According to the characte...

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Problems solved by technology

At present, the application of large space-borne mesh antennas is becoming more and more extensive, and the profile accuracy has become one of the important indicators for evaluating antenna performance. However, the profile evaluation method of mesh antennas only considers the design and manufacturing errors on the ground. There is no uniform evaluation standard for errors, repeated deployment errors, thermal deformation errors, and on-orbit profile predictions

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