机载拖曳天线垂度变化规律

doi:10.7527/S1000-6893.2023.28655

Abstract

Abstract:

Verticality of a towed antenna is the ratio of altitude difference between the antenna end and the aircraft to the length of an antenna. In response to the high verticality requirement of an airborne towed antenna for long wave communication， the variation law of a towed antenna verticality was studied. A dynamic model of a towed antenna was established， and the particle swarm optimization was used to solve the model. The model parameterswere set based on the American TACAMO system. The effects of speed and bank angle on antenna verticality were studied. The verticality jump and the high verticality turning point were analyzed. The results show that variation of the antenna verticality is divided into three regions： the low verticality region， the jump region， and the high verticality region. The variation trend is inversely proportional to the speed and height， and directly proportional to the bank angle. The change is small in the low verticality region， and large in the high verticality region. In the jump region， the antenna verticality has a sudden change and multi-value solutions. By increasing the linear density of the antenna or reducing the lift coefficient， the sudden change of verticality can be alleviated. The ratio of aircraft circle radius to antenna length has a decisive influence on the high verticality turning point. The radius-length ratio corresponding to the turning point of 70% verticality is about 0.3. As the speed increases， the radius-length ratio corresponding to the turning point decreases， but the change is small. The influence of flight altitude and antenna length on the high verticality turning point can be ignored.

Key words: long wave communication, towed antenna, dynamic model, verticality change, turning point of high verticality

CLC Number:

V212

Hong LIANG, Renjun QIAN, Zhaoxiong HE, Chao LI, Jiangyu HU. Variation law of airborne towed antenna verticality[J]. Acta Aeronautica et Astronautica Sinica, 2023, 44(15): 528655.

Figures/Tables 15

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Variation law of airborne towed antenna verticality

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