Optimal manipulator Tolerance Design using Hybrid Evolutionary Optimization Technique

There is a need to select optimal parameter tolerance of manipulator to reach an economic balance between the desired performance and its manufacturing cost. However, selection of optimal parameter tolerances of manipulator is a challenging task. Present paper discusses an offline approach to incorporate effect of noise in simulation of performance and handle its effect in optimization process of parameters tolerances. To determine optimal parameter tolerances, a hybrid evolutionary optimization technique has been used. The hybrid is formed between differential evolution optimization technique and orthogonal array used in design of experiments technique. Proposed technique has been illustrated by selecting optimal tolerances of 2-DOF RR planar manipulator. It has been observed that the methodology is a viable alternative to the costly prototype testing, where only mathematical models are dealt with.