Search Results

Detailed model of the longitudinal dynamics of a typical automobile is developed. A nonlinear controller is designed for speed control of the automobile. Integrated System's CACSD tool SystemBuild is used to simulate and test the controller. A complete automotive control design package is developed using SystemBuild and Xmath.1 The modular design can work as a software/simulation test platform for new designs of various subsystems of the automotive powertrain.

In recent years, the automotive industry has seen a rapid increase in the “on-board electronics content” of vehicles. Such technology has given rise to ever increasing levels of safety, comfort and performance in this high production-volume industry. Cost considerations require that most on-board electronics be implemented on fixed-point processors. As companies look to extract more (performance) for less (implementation costs & lead time) the job of designing on-board fixed-point application software is becoming more and more challenging. This paper discusses the use of fixed-point design tools that were recently introduced in the MATRIXx® product family. These tools feature a high-performance fixed-point simulator, and a kit of interactive tools that enable engineers to study signal ranges and overflow/underflow conditions. Tools to perform trade-off studies between performance and fixed-point attributes are also discussed.

The development times and costs of control strategy software have been under intense scrutiny by automotive manufacturers and suppliers. The time required to produce, optimize, calibrate, and verify a vehicle's control software has become an inhibiting process to deploying proof of concept vehicles. To eliminate this bottleneck the vehicle manufacturers and suppliers are turning to sophisticated graphical modeling and code generation tools to accelerate control software development programs. In addition, vehicle manufacturers are also increasing the use of distributed controllers which, in addition to their numerous other benefits, can also allow simultaneous development of various control systems and thereby reduce the total control system development time.