小型无人直升机活塞式发动机建模技术

Modeling Technique of Piston Engine System for Small Unmanned Helicopter

针对传统的无人直升机发动机研究方法存在的问题,提出一种新的活塞式航空发动机系统建模方案。结合旋翼系统的特性,利用叶素理论对旋翼桨叶进行分析,分别建立了发动机功率特性模型和旋翼的负载模型,根据发动机的动力学特性得到发动机的转速,并通过Matlab仿真和试车台试验进行验证。仿真试验结果证明:该模型合理可行,能够满足无人直升机的仿真控制要求。

For the problems of traditional research methods of unmanned helicopter engine, a new modeling method of piston aircraft engine system was proposed. Combining with the characteristics of rotor system, blade element theory is applied to analyze rotor blades. Then engine power characteristics model and rotor load model were established. According to the dynamics of engine, engine speed is calculated. Finally, Matlab simulation and ground test stand testing were carried out to verify the control performance. Simulation results show that the model is reasonable and feasible and meets the control requirements of unmanned helicopter simulation.