推力向量雙擺致動機構運動精度分析

Motion Accuracy Analysis for the Bi-actuating Mechanisms of Thrust Vector Control Systems

曾羲峰(Yih-Feng Tzeng)

《中國航空太空學會學刊》 34卷4期 (2002/12) Pp. 339-345

https://doi.org/10.6124/TAASRC.200212_34(4).06

摘要

雙擺致動機構是決定推力向量系統定位精度的一個重要模組，本文針對推力向量雙擺致動機構建立了一個數學模式，可經由正向及逆向解析流程得知雙擺致動器長度命令輸入與可動噴嘴空間指向角輸出關係，以作爲分析及控制可動噴嘴的空間指向角。同時，將雙擺致動器反應速度快慢不同問題、安裝偏差問題，及可動噴嘴旋轉自由度問題導入。最後利用數值解析的方法，研析上述問題對可動噴嘴定位精度的影響，以供設計之參考。數值解析結果顯示，在線性致動器的安裝偏差及可動噴嘴旋轉自由度範圍，均會影響推力向量系統的定位精度，需加以適當限制，方能獲得較佳之定位精度。

關鍵字

雙擺致動機構 ； 可動噴嘴 ； 推力向量

並列摘要

A mathematical model between the length of bi-actuating mechanisms and the orientation of moving nozzle is established in this investigation. For the purposes of analysis and control, both forward and inverse numberical analytical schemes are developed to solve this mathematical model. The schemes are also developed to solve problems of the different performance of actuators, the installation deviation of actuators, and the rotation freedom of moving nozzle. Finally, the numberical analysis process is used to study the orientation error induced by those problems. The numberical analysis results show that the installation deviation of actuators and the rotation freedom of moving nozzle would have great influence on the orientation precision of thrust vector control system. Therefore, an appropriate control on both actuator installation deviations and nozzle rotation is necessary for achieving an acceptable orientation precision in the thrust vector control system.

並列關鍵字

Bi-actuating mechanisms ； Moving nozzle ； Thrust vector control system