Aiming at the demand of design , this paper analyses the helicopter airscrew electro - hydraulic servo loading system 随着新型试验系统研制的需要，对其功能要求越来越强、性能指标要求越来越高。
The work principle of the motor driving airscrew is presented in the dissertation . the reasons and the method of elimination or suppression of torque pulses produced by bldcm are analyzed 该论文先介绍了螺旋桨驱动电机的工作原理，分析了无刷直流电机转矩脉动产生的原因及消除或抑制方法。
The paper introduces the structure of helicopter airscrew loading system and constructs the mathematical model of single channel loading system and analyses its dynamic performance 论文介绍了直升机旋翼加载系统的结构，在建立了单通道加载系统的数学模型的基础上，分析了加载系统的动态性能。
First , a global review on the helicopter airscrew multi - channel harmony loading control system is introduced . then on the basis of its working principle , a mathematical model of the system is constructed 论文在介绍直升机旋翼气动力模拟加载系统的基础上，分析了加载系统的结构，建立了整个加载系统的数学模型。
A distributed computer control system which is used in an helicopter airscrew multi - channel harmony loading test project is introduced in this paper . the paper analyses the construct and the model of the system 论文结合实际的工程项目，以某型号直升机旋翼气动载荷模拟为研究内容，对加载计算机控制系统的组成、系统数学模型进行分析和研究。
Problems appearing at work and tackling methods are both presented . recently , the research result has been applied to the helicopter airscrew harmony loading test . the results of harmony loading test show that it has high performance 目前，论文的研究成果已经成功地应用在某型直升机旋翼载荷模拟加载试验系统中，实际加载试验表明，该加载控制系统能很好的完成加载试验控制，保证系统的控制性能指标。
The produce process contains : fiberglass process , foam process , balsa process and layer press board process etc . the product range among : emulate slide flight , engine motor flight , electromotion flight , eject flight , airscrew and the accessory of various flight model 翔华航模的生产工艺现有玻璃纤维制作，泡沫塑料制作， balsa制作，层压板制作。产品包括像真滑翔飞机，引擎动力飞机，电动飞机，喷射飞机以及螺旋桨和各种飞机模型配件。
To a helicopter , one of the key technologies is how to control the airscrew . so it is very important to simulate aerodynamic loads acting on the helicopter ' s airscrew when the helicopter is flying in the air . it affords datum , which are contributed to the use of new flight vehicle 对于直升机来说，旋翼操纵控制是其关键技术之一，对旋翼进行地面加载试验，模拟旋翼在飞行过程中所受的气动载荷，对于研究和改进直升机飞行控制系统非常重要。
Included three positions system , the helicopter airscrew electro - hydraulic servo loading system has coupling nexus of three positions and three loadings . trough analyzing nexus of the displacement and the force , this paper designs the three channels electro - hydraulic servo loading system basing on the analysis of single channel electro - hydraulic servo loading system . surplus torque , which is produced through position disturbance , is a chief problem facing aerodynamic loading system 直升机旋翼的操控通过三个助力器完成，模拟负载时把旋翼所受空气动力折算到了三个助力器上，由于三个助力器是铰点在一个模拟盘上，所以三通道加载系统与三个助力器位置系统有一定的耦合关系。
A mathematic model of the motor is builded and emulated through matlab . the low - speed and constant - torque , high - speed and constant - power state is analyzed and researched , also the software approach of simulation to the driver has been done , a digital signal processor tms320lf2407 is developed successfully to control the perm square - wave bldcm driving airscrew of solar powered unmanned engine . it is useful to the further study 在matlab下建立了电机的数学模型，通过计算机仿真，验证了数学模型的正确性，同时在理论上对低速恒转矩高速恒功率运行进行了分析与研究，提出了一种用模糊控制的方法实现恒功率控制，并对驱动器进行了系统仿真，成功的研制了以数字信号处理控制器tms320lf2407为控制核心的驱动器，控制无刷直流电动机驱动太阳能无人飞机的螺旋桨，为后面继续研究工作提供了参考。
