Abstract
Controller integrity is a significant concern in automotive control systems. For the last several years, many techniques have been introduced about controller safety and integrity verification. An asymmetric processor approach is one of major approaches. Some regulations and international standards recommend the asymmetric processor approach to achieve controller integrity. Typically, braking system, power steering system, and engine management system with electronic throttle control system among automotive control systems are using this approach. Even though these systems use the asymmetric approach, usage for each system is different from each other because applications are difference. It means that each of these systems needs its own requirements. This paper reviews the asymmetric processor approach and its’ extended concept. And it reviews the basic functions of braking system, power steering system and engine management system, and discusses the reason why these three systems need failsafe and the parts which need failsafe. As a result, this paper discusses an overview of how to integrate the asymmetric processor approach in these three systems, and their significant technical issues are discussed. Then, several requirements are also discussed to solve significant technical issues. These requirements will be bases of the advanced common platform for automotive control systems using the asymmetric control processor.
Keywords: Failsafe, Asymmetric processor, Braking system, Steering system, Electronic throttle control, Engine management system.