Abstract
Rigorous model-based design and control for intelligent vehicle suspension systems play an important role in providing better driving characteristics such as passenger comfort and road-holding capability. This paper investigates a new technique for modelling, simulation and control of semi-active suspension systems supporting both ride comfort and road-holding driving characteristics and implements the technique in accordance with the functional mock-up interface standard FMI 2.0. Firstly, we provide a control-oriented hybrid model of a quarter car semi-active suspension system. The resulting quarter car hybrid model is used to develop a sliding mode controller that supports both ride comfort and road-holding capability. Both the hybrid model and controller are then implemented conforming to the functional mock-up interface standard FMI 2.0. The aim of the FMI-based implementation is to serve as a portable test bench for control applications of vehicle suspension systems. It fully supports the exchange of the suspension system components as functional mock-up units (FMUs) among different modelling and simulation platforms, which allows re-usability and facilitates the interoperation and integration of the suspension system components with embedded software components. The concepts are validated with simulation results throughout the paper.
Highlights
With the increasing level of technology integration in road vehicles, the automotive industry is focusing more on delivering better driving characteristics, such as passenger comfort, road-holding capability and energy consumption
We focus on semi-active suspension systems that use electro-rheological (ER) dampers
We investigate a new technique for modelling, simulation and control of semi-active suspension systems supporting both ride comfort and road-holding driving characteristics, and we implement the technique in accordance with the functional mock-up interface standard FMI 2.0
Summary
With the increasing level of technology integration in road vehicles, the automotive industry is focusing more on delivering better driving characteristics, such as passenger comfort, road-holding capability and energy consumption. The implementation of vehicle suspension models and controllers for embedded software requires very high efforts in creation, simplification, discretization and numerical solution, implementation, testing and fulfilling coding requirements, because no appropriate tool support is available and all parts have to be manually developed This limits the usage in production code software on automotive ECUs significantly and is the major reason why currently, only a few physics-based models and controllers are utilized in automotive ECUs. In addition, there is today no generic simulation solution supporting model and control export suitable for direct integration into automotive embedded systems. We investigate a new technique for modelling, simulation and control of semi-active suspension systems supporting both ride comfort and road-holding driving characteristics, and we implement the technique in accordance with the functional mock-up interface standard FMI 2.0.
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