High-precision umbrella antenna-shaped profile evaluation method

Abstract

The invention discloses a high-precision umbrella-shaped antenna profile evaluation method, and belongs to the technical field of antennas. The method mainly comprises the following three steps: distributing profile errors of a high-precision umbrella-shaped antenna, and dividing the profile errors into design and manufacturing errors, measurement errors, profile expansion repetition errors and thermal deformation errors; calculating and evaluating antenna ground errors, and calculating design and manufacturing errors, profile measurement errors, repeated expansion errors and thermal deformation errors to obtain final ground profile precision of the antenna; and predicting an on-orbit profile of the antenna, and predicting the on-orbit profile of the antenna according to ground test and finite element simulation. According to the method, distribution calculation is carried out on the antenna profile precision to obtain the antenna profile precision meeting task indexes, and meanwhile,guided ground assembly debugging and on-orbit profile prediction of the antenna can be realized; the profile precision is an important index for evaluating the antenna; the profile of the high-precision umbrella-shaped antenna can be evaluated by using the method; and the method has an 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 space science and technology, space activities such as manned spaceflight and deep space exploration have placed higher requirements on satellite antenna reflectors, such as larger diameters, high profile accuracy, high storage ratios, and lighter weight. At present, the application of large-scale satellite-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 for mesh antennas only considers the design and manufacturing errors on the ground. There is no unified evaluation standard for errors, repeated expansion errors, thermal deformation errors and on-orbit profile predictions. [0003] According to the characteri...

AI Technical Summary

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

Images