The current development of new products and improving of the existing is almost unimaginable without the application of some CAD system. Since the products are intended for people it is necessary to pay particular attention to human factor, which manifests itself as taking into account the ergonomics for the purpose of easier and more convenient use of the product, as well as for health purposes - injurious impact of long-term use of the product. The producers of CAD systems know it and integrate into their systems modules designed for ergonomic analysis. One of these systems is also CATIA, which has various instruments designed for ergonomic analysis. Their using can be very diverse and can be applied to design of almost any product, but their use is dominant in the products which are intensively used by humans, as is by example: car. The article describes the application of selected modules in ergonomic seat design and verification of the suitability of the location of the car steering wheel.
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