Multidisciplinary Collaborative Design Optimization Of Aircraft EMA/EHA Actuator

The new aircraft tends to develop in need of high speed,high pressure and fast response.The actuation system is the core technology of the operation control system.As an important part of new aircraft,advanced actuator is the key component to control actively.As the key technology with a great influence on the development of new aircraft,the development of airborne actuation system has currently become a breakthrough in the whole world.Electro-Mechanical Actuator(EMA)and Electro-Hydrostatic Actuator(EHA)are two main types of complex actuation system.The design is a systematized engineering which includes multidisciplinary coupling and multi-objective optimization.Therefore,Multidisciplinary Design Optimization(MDO)is applied to the design of airborne EMA and EHA system to deal with the problems.To obtain the optimal design,the influence of different disciplines coupling will be considered from the systematic view,which can effectively shorten the design period.This paper mainly explores the multidisciplinary design optimization problem of EMA and EHA.The research contents and achievements are as follows:(1)The analysis and performance comparison of Design Space Decrease Collaborative Optimization(DSDCO)is carried out.Firstly,the main idea and characteristics of the collaborative optimization algorithm is introduced,advantages and disadvantages are discussed,and three main improved algorithms at present are summarized.Secondly,an improved algorithm called DSDCO is introduced,which is a new collaborative optimization algorithm.Finally,the performance of three different collaborative optimization algorithms is compared through two numerical test examples and an NASA standard test example.By comparison,the DSDCO algorithm is not sensitive to the initial point and the convexity and concavity of the constraint function,and it can get the global optimal solution of the optimization problem.(2)According to the working principle of EMA,we use MATLAB/Simulink to build the working model of EMA system,and use DSDCO algorithm to do multidisciplinary design optimization of EMA.The subsystem analysis of EMA is carried out.EMA is decomposed into two disciplines,mechanical structure and reliability discipline.To improve the output force,the optimization model of the EMA multidisciplinary design problem is set up.The optimal solution is solved by the DSDCO algorithm,which is obtained to satisfy the discipline constraints.The results are analyzed.(3)According to the structural characteristics of EHA,the mathematical model of different parts is established to derive Laplace transfer function of EHA,and the natural frequency and gain are obtained.To shorten the response time of EHA,the mathematical model of EHA multidisciplinary design optimization problem is established.Using the DSDCO algorithm to optimize the multidisciplinary design of EHA,EHA is analyzed,which takes the natural frequency of the EHA system as the optimization target.EHA is decomposed into the hydraulic transmission subsystem and mechanical structure subsystem.The constraint equations of the two subsystems are established and the DSDCO algorithm is used to optimize the solution,and the optimal solution satisfies the discipline constraints.In the paper,EMA and EHA get the design parameters to meet the constraints,using DSDCO algorithm to optimize the performance.The optimization results show that DSDCO algorithm can achieve the purpose of optimizing the performance of EMA and EHA.This paper makes a research on the multidisciplinary collaborative optimization of EMA and EHA,which provides some reference for the collaborative optimization of the airborne actuation system,and expands the application scope of the collaborative optimization algorithm.The collaborative optimization design of EMA and EHA is a new design research.Therefore,the application of DSDCO algorithm to multidisciplinary design optimization of complex actuation system is of innovation and important practical significance.