一种新型发动机功率试飞数据处理和代理模型建模方法  

A New Method to Deal with Engine Test Data and to Build Agent Model of Engine

作　　者：周灵玲 邱良军[1] ZHOU Lingling;QIU Liangjun(China Helicopter Research and Development Institute,Jingdezhen 333001,China)

机构地区：[1]中国直升机设计研究所

出　　处：《直升机技术》2019年第4期32-35,39,共5页Helicopter Technique

摘　　要：正确计算发动机功率是获得直升机准确的基本飞行性能的前提,传统换算方法无法考虑现代涡轮轴发动机性能曲线的非线性变化。提出了一种新的发动机功率试飞数据处理方法,并建立了发动机可用功率代理模型。通过分析现代涡轮轴发动机性能曲线的特点,对发动机数据分段使用最小二乘法处理分析,进而获得更加准确的发动机性能曲线,并建立发动机功率代理模型。根据涡轮轴发动机安装损失试飞实测数据的特点,建立新的发动机安装损失计算方法。实际试飞验证表明,该方法相比传统分析方法,可以考虑发动机性能曲线的非线性变化,提高了发动机可用功率数据处理和计算的精度,更简便地考虑发动机安装损失和实际试飞中所需留取的余量,并且可以使用海平面的发动机试验数据推算发动机安装损失和高原发动机可用功率,有效提高高原试飞数据处理精度和高原基本飞行性能的计算精度。The reasonable power of engine is the base to calculate helicopter performance correctly while the traditional method for engine power cannot take the non-linear characteristic into account. A new method to deal with engine test data and to build agent model of engine power was proposed in this paper. Engine power curve was built by cutting the data into two parts and the least square method was used. In addition,a new process for installation loss was also set up by analysis the flight data. The advantage of these new methods was proved by practice. They were more precious and reasonable to improve the accuracy of helicopter performance calculation.

关 键 词：涡轮轴发动机 试飞数据 可用功率 安装损失 

分 类 号：V235.12[航空宇航科学与技术—航空宇航推进理论与工程] V217.1