A Full Extension Of Topology Optimization To Mechanism Design

Compared with the traditional mechanism, a compliant mechanism also can transfer or transform the motion, force and energy. However, unlike rigid-body mechanism, compliant mechanism show at least some of the motion and function by the deflection of flexible member rather than joints only. The advantage of compliant mechanism can be well known as low cost, no lotion, reduce pollution, reduce wear, reduce weight and increase precision. Widely applied in the work needing high precision and low weight, and always keep a high precision control. However, when compliant mechanism gain mobility by self-deformation, which needs an over input energy, will lead to an unexpected energy store, and release by the return force. This characterize more or less will reduce the performance of compliant mechanism, especially in the precision force control solution. On the other hand, the inertial force, which cause by the mess body rotate around the mess center, will lead to the shaking when the inertial force work in frame, and this shaking will make serious effect on performance of compliant mechanism.This thesis use Ground Structure Approach to decorate the topology model and Genetic Algorithm to calculate, make a deep research in fully force balanced compliant mechanism through topology optimization. According to the principle of shaking force balancing for traditional bar-mechanism, base on adding spring approach and counting weight approach, put forward three new approaches and apply in shaking force balancing of compliant mechanism through topology optimization, with reduce the bad effect from energy store, it also shows a new way to do balancing as "design for balancing". The simulate results MATAL proves that the new approach works well.The contribution of the work lies in three aspects. First, the strength control is introduced in the design model. Second, two techniques for force balancing, namely add-of-spring and change of cross section areas, were developed for compliant mechanisms, last, The work is validated through a simulated experiment implemented in the MATLAB environment. The result of the experiment is promising. The force-balance property of compliant mechanisms is very attractive in biomedical systems where physical implants (which are compliant mechanisms) are embedded in biological systems.