直升机实时仿真建模中的关键问题探讨

分析了直升机飞行动力学模型在型号研制过程中的重要地位，阐述了建立满足工程模拟要求的数学模型理论背景以及建模工作中的难点，研究了建立高置信度模型的主要方法，指出尚存在的问题以及当前研究工作的重点，从直升机飞机动力学模型组成结构出发，分别讨论了旋翼气动载荷模型及诱导速度模型，机身气动力模型，发动机模型和飞行控制系统模型的研究方法，及模型研究中问题的解决途径，文中还介绍了基于Newton-Raphson方法的非线性微分方程组算法，并针对模型算法的实时性进行了有益的探索。

Real-Time Simulational Model for High Fidelity Engineering Simulator of Rotorcraft

How to build a high fidelity real time simulation model is described for a rotorcraft engineering simulator. The flight simulation technology is an important tool used by the beforehand research and design process. To build a high fidelity mathematical model for the engineering simulator is a kernel problem currently. Key problems are discussed, they are rotor wake model with finite states induced velocity model, the blade element model for rotor forces and moments, the aerodynamic interface models for the airframe forces and moments, the digital flight control system model, and the digital engine model. A Newton Raphson method is used for solving the large scale system equation, and the real time character is evaluated by a rotorcraft simulation model. The model is the most complex at current time, and it is enough fast for the real time application.