Multiobjective optimization of hard disk suspension assemblies: Part I—structure design and sensitivity analysis

A multiobjective optimization of the suspension assemblies of hard disk drives is demonstrated. The natural frequencies of the suspension assembly are treated as objective functions subject to side constraints of design variables that describe the shape of the suspension. With the help of an interface program the multiobjective optimizer communicates with an advanced finite element analysis program, without writing a single source code. The gradient information in the optimal design is calculated by finite differences, and the sensitivity analyses are performed numerically with respect to design variables. Preloading and air bearing effects are both considered in the optimal design. Moreover, a final solution is determined by the decision maker with additional knowledge and engineering experience.