大型飞机起落架地面转弯性能仿真与分析

发布时间：2018-06-26 20:07

本文选题：大型民机 + 起落架　；参考：《南京航空航天大学》2013年硕士论文

【摘要】：飞机地面操纵特性直接关系到飞机起降的安全，而操纵前轮转向作为飞机地面操纵转弯的主要方式。随着我国大型民机的技术要求的不断提高，研究测量民机在定常速度下转弯的能力有助于提高我国具有自主知识产权的大型客机的安全性，对实现我国大型民机成功研制具有重要的意义。转弯系统可以分成前轮转弯机构和液压伺服操纵控制系统两个部分，本文以大型民机单作动筒式前轮转弯系统为研究对象。首先阐述了全机多体动力学的建模方法，基于LMS Virtual.labMotion建立全机的动力学模型，并进行全机动态定常速度下转弯性能仿真分析。其次阐明了电液伺服控制系统的数字化传递方程，选取合适的电液伺服阀和液压动力机构，，基于MATLAB/Simulink对电液伺服控制系统进行建模分析，并单独对已经选取的电液伺服系统进行仿真，验证系统的性能。最后设置LMS Virtual.lab Motion和MATLAB/Simulink软件平台接口，修改完善已有的动力学模型和转弯系统模型，联合动力学模型和控制模型进行仿真研究，分析飞机转弯的轮胎参数，总结出不同转弯速度对飞机安全性能的影响后，选取合适的转弯速度仿真，求解最终安全的角度。通过仿真分析，验证了联合转弯系统设计工作的可行性，获得了一些有价值的设计经验及结论，为以后的详细设计工作和进一步的实体飞机试验验证工作提供了可行性的基础参数。
[Abstract]:The ground control characteristics of aircraft are directly related to the safety of aircraft take-off and landing, and the steering of front wheel is the main way of ground handling and turning of aircraft. With the continuous improvement of the technical requirements of large civil aircraft in China, the study of the ability to measure the turning of civil aircraft at constant speed will help to improve the safety of large passenger aircraft with independent intellectual property rights in our country. It is of great significance to realize the successful development of large civil aircraft in China. The turning system can be divided into two parts: front wheel turning mechanism and hydraulic servo control system. Firstly, the modeling method of multi-body dynamics of the whole machine is introduced. The dynamic model of the whole machine is established based on LMS Virtual. LabMotion, and the turning performance of the whole machine under the constant speed is simulated and analyzed. Secondly, the digital transfer equation of electro-hydraulic servo control system is expounded, and the appropriate electro-hydraulic servo valve and hydraulic power mechanism are selected, and the electro-hydraulic servo control system is modeled and analyzed based on MATLAB / Simulink. And the selected electro-hydraulic servo system is simulated to verify the performance of the system. Finally, LMS Virtual.lab Motion and MATLAB / Simulink software platform interface are set up to modify and perfect the existing dynamic model and turn system model, to simulate the joint dynamics model and control model, and to analyze the tire parameters of airplane turning. After summing up the influence of different turning speed on the aircraft safety performance, the appropriate turning speed simulation is selected to solve the final safety angle. Through simulation analysis, the feasibility of joint turning system design is verified, and some valuable design experiences and conclusions are obtained. It provides the feasible basic parameters for the detailed design work and the further solid aircraft test verification work in the future.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：V226

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