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Abstract

In a method and an apparatus for automatically fabricating a physical prototype, an initial prototype is created, which need not satisfy the specified performance characteristics. An initial Jacobian matrix relates changes in the prototypes design variable physical features to changes in the prototype performance characteristics. The prototype is tested to determine the error between the specifications and the prototype performance characteristics. The initial Jacobian is applied to this error to generate a change order signal for the physical features. This change signal is input to a prototyping apparatus, preferably automatic and rapid, which physically changes the prototype. The prototype is again tested for satisfaction of the specifications. If necessary, the prototype is changed again and again. The Jacobian, can be automatically changed by comparing the change in performance from one prototype to the next prototype, with the change made in physical features and applying a recursive least squares method to recursively change the Jacobian. The prototype and the Jacobian automatically converge to accurate versions of each. An apparatus includes a prototype fabrication unit, an experimentation unit, and a design feature change calculation unit, which also includes a Jacobian adjustment unit. Systematic, automatic design of complex physical structures is accomplished, without the need for a precise initial prototype or understanding of the relationship between the physical features and the performance characteristics.

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First Claim