基于能量和性能分析的新型飞行作动系统研究

Flight actuation system is the huge dynamic load of the power consumption part in Aircrafts, so energy-saving design is the key technology for new types of actuators. This project will focus on flight actuations integrated multi-domain including mechanical, electric, magnetic, hydraulic and pneumatic power, and inter-discipline mixed with mechanics, electricity, fluid and control. By applying Bond Graph theory based on power flow into flight actuations' graphic modeling, respectivly causal bond graph model(CBG) and bicausal bond graph model (BBG) will be built for electro-hydraulic servo ocntrol actuators (SHA) and electro-hydrostatic actuator (EHA); Simulation results will be attained by employing Modelica which frequently used in multi- domain modeling and simulation based on bond graph and AMEsim which is popular used in hybrid systems combined with mechanical-electrical-hydraulic parts; This project will analyse the duality of CBG and BBG model, compare the performance of actuaotrs,and exploit the factors of energy loss located in actuators; then set up the test bench combined with prototype of EHA and virtual actuators in the form of CBG model or BBG model of SHA and EHA. Some experiments will be designed to anaysis the effects of nonlinearilities on modeling of EHA-CBG and EHA-BBG; Finally, this project will synthesize the procedure of the bond gragh of an optimal control problem in duplex actuation systems where the integral performance index contains dissipative energy and an output error to minimize, while concerning the assignment of atuators' work mode for similar redundancy of EHA + EHA combination and dis-similar redundancy of SHA + EHA combination. The contribution of this project will provide usful rules and guidelines for the design of redundant actuation systems of More-Electric Aircrafts .

飞行作动系统是飞机能量利用端的大负载，节能设计是关键技术。针对多电飞行作动系统跨能域（机、电、磁、液、气）和交叉学科（机械、电气、流体、控制）的特点，应用基于功率流的键合图理论，分别以因果关系键合图CBG和双向因果关系键合图BBG建立液压伺服作动器SHA和电动静液作动器EHA的键合图模型；采用基于键合图理论的系统建模与仿真软件Modelica和机电液仿真软件AMEsim联合进行仿真分析，对比研究CBG与BBG模型的对偶性、作动器的动态性能和能量损失要素；以EHA样机和虚拟样机即SHA、EHA的键合图模型进行半物理实验验证，改进作动器非线性BBG模型；以某飞行作动系统为例，研究EHA+EHA组合的相似余度系统和SHA+EHA组合的非相似余度系统的工作模式对系统能量损失和性能的影响。首次基于键合图建立能量和性能双指标优化的余度作动系统体系结构分析设计方法。为新型飞行作动系统设计提供参考。

针对多电飞行作动系统跨能域（机、电、磁、液、气）和交叉学科（机械、电气、流体、控制）的特点，应用功率键合图理论，分析并建立了新型作动器包括液压伺服作动器SHA、电动静液作动器EHA、机电作动器EMA和电备份综合作动器EBHA的键合图模型；采用基于键合图理论的作动器模型在20-Sim仿真软件中进行仿真分析，对比研究了CBG与BBG 模型的对偶性、作动器的动态性能和能量损失要素；以EHA 样机和虚拟样机即SHA、EHA的键合图模型在机电液仿真软件AME-sim环境中进行了半物理实验验证，并研究EHA+EHA的相似余度系统和SHA+EHA与EHA+EMA的非相似余度系统的工作模式对系统能量损失和性能的影响。初步形成了基于键合图理论建立能量和性能双指标衡量的余度作动系统体系结构分析设计方法。