运输机机械操纵系统动力学建模与性能验证

Dynamics modeling and performance verification of the mechanical flight control system on transport airplane

为提高大型运输机长跨度软式操纵系统(MMFCS)设计时的操纵性能,而得到优化的机械飞行操纵系统,采用软式操纵回路等效刚度的计算方法,引入钢索等效弹性模量的计算公式,得到软式操纵回路的等效刚度计算新方法.用多自由度刚体动力学的方法研究了整个软式操纵系统的建模问题,在一个软件平台上建立了整个操纵系统动力学模型,为操纵系统性能的综合性能仿真和品质评定提供了一种新思路.通过数字仿真结果与机械操纵系统物理实验报告的比较,证明了操纵系统回路刚度计算以及系统操纵性能仿真具有工程设计的参考意义,验证了该方法的有效性.

To improve the manipulation performance during the design of the longspan steel cable control system （SCCS） on a large transport airplane （LTA） and obtain an optimal configuration of the mechanical manual flight control system （MMFCS）, this paper introduces a new calculation method of equivalent stiffness for the SCCS based on the formula of the equivalent elastic modulus of the steel cables. Then, this paper studies the modeling of the whole MMFCS by multidegree free dom rigid body dynamics, and the dynamic model of the whole MMFCS is built on a software plat form. Thus a new method is provided for the comprehensive performance simulation and the flight quality assessment of the MMFCS. By comparing the digital simulation results with the physical ex periment data of the MMFCS, it shows a good reference in engineering design process about the stiffness calculation of longspan SCCS and manipulation performance simulation of the whole MMF CS, and it proves the validity of this proposed method.