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An electronically controlled hydraulic pressure regulator, that could be used in an automotive or aircraft “brake-by-wire” system, is analyzed using the Saber® Simulator. The design incorporates electrical, mechanical and hydraulic elements. The entire dynamic system is modeled, including the interactions between the hydraulic and electrical components. Sensitivity analysis is used to identify key parameters affecting performance, and stress analysis indicates components that are operating near or above rated values. These simulation techniques are applicable to a broad range of dynamic systems, especially those containing multiple technologies that must work together to accomplish the overall design objectives. The method supports the concept of interdisciplinary design teams, by providing enhanced communication among engineering specialists.

A versatile new modeling technology was used to help design an innovative traction control system. Using models written exclusively in the IEEE Standard VHDL-AMS language, simulation-based analysis and verification were performed at both the component/subsystem and at the overall system levels. Key insights were gained about a wide range of design issues, from the critical need to bleed the brake lines, to power converter topology trade-offs, to detecting inherent wheel lock-up modes in the control algorithm. This paper presents modeling and simulation techniques applicable to a wide range of automotive “mechatronic” systems, where coordinated interaction of mechanical, electronic and software components is required to meet performance goals.