http://www.synopsys.com/products/mixedsignal/saber/saber.html
Saber® software simulates physical effects in different engineering domains (hydraulic, electronic, mechanical, thermal, etc.) as well as signal-flow algorithms and software control. Saber is used in the automotive, aerospace, power and IC industries to simulate and analyze systems, sub-systems and components under a variety of different operational and environmental conditions. This dramatically improves design reliability while reducing the need for physical prototypes.