Synthesis Of Shape Morphing Compliant Mechanisms With GA-ESO And Its Applications

Although conventional hinged mechanisms can change the wing shape in response to the change in flying speed, the connecting hinges create discontinuities over the wing surface, leading to earlier airflow separation. To overcome this problem and Make the leading edge of variable camber wing change shape smooth. this research focuses on the development of a method for synthesizing the topology and dimensions of compliant mechanisms for shape morphing applications. Especially the application to variable camber wing.In this paper, firstly, Developing the binary ground structure representation scheme and genetic algorithms and evolutionary structural optimization (ESO) for shape morphing compliant mechanisms. Some other aspects work are addressed including analyzing the task feasibility of the given initial shape curve and anticipate shape carve, the process of the domain parameterization and the individual structure finite element analysis during the optimization. The work above provide a foundation for analysis and design shape morphing compliant mechanisms .Secondly, Use of binary ground structure for design domain parameterization and building the mathematical model of shape morphing compliant mechanisms; Base on binary and real code technology to building the mixed variable GA model. The synthesis methodology is demonstrated through a leading edge by programming on MATLAB tool. The preliminary results show that compliant mechanisms can achieve desired shape for leading edge of wing. They also indicate that the feasibility of simultaneously addressing the topology and dimensional aspects, and eliminates the gray area. In order to remove inefficient elements in the GA result structure, a new algorithm called GA-ESO is put forward. GA-ESO algorithm combined the idea of evolutionary structural optimization into GA optimization process. The lead edge of wing is also taken as example. The results demonstrate that the bad elements are eliminated, and that both the speed of optimal process and the effectiveness of the results are improved. Beside, no need post process for the result structure.A leading edge shape morphing is also investigated in this paper with higher external loads. Compliant mechanisms are designed to meet both kinematics(shape...