Research On Methods Of Helicopter Flight Dynamics Modeling With Different Complexity

Flying Quality is one of the most significant design objectives of modern helicopters. In order toensure the flying quality of a new-designed helicopter, engineers have to develop a series of helicopterflight dynamics models with different complexity. However, the adaptation of existing software usedfor helicopter flight dynamics modeling and analyzing is not flexible enough to satisfy the needs ofrapid modeling for helicopters of different configuration with different complexity. Basing on that,this thesis presents a method and constructs a software platform that can modeling rapidly fordifferent helicopters of different configuration using different theoretical models.This thesis analyzes the common theoretical models used for helicopter flight dynamics modeling,envelop these models to classes which are considered as basic components, and then integrated theminto the platform. The platform implements an automatic management of the components’ public data,and the user components’ independence is achieved by the high coupling between the systemcomponents. Besides, the management processes of different components forming a whole model, themodel forming flight dynamic equations and analysis based on the equations are also studied in thisthesis. At last, UH-60black hawk helicopter and CH-47Chinook helicopter are used as samples toconfirm the platform’s adaptation for the changes of helicopter’s configuration and theoretical models.