In this paper we present an adaptive controller implementation based on the multiple models, switching, and tuning (MMST) paradigm [13, 14, 15] for preventing un–tripped rollover in automotive vehicles. Our approach relies on differential-braking to keep the value of the Load Transfer Ratio (LT R) below a threshold. We first employ multiple models to infer the unknown center of gravity height a...

Presently, main applications can be found in the automotive market segment (e.g. front and side airbag sensors, ESP respectively chassis stabilization, active suspension, roll over detection). However, low-g sensors enter also new application areas like inclinometry and vibration sensing for instance for anti-theft devices or activity monitoring for pacemaker control. Like in the microelectroni...

AbsfraclThe influence of specifying a roll moment distribution to effect the handling dynamics of automobiles has long been appreciated by conventional automotive designers. With the advent of active suspension systems, it is now possible to actively vary the roll moment distribution via feedback control. Nonlinear vehicle dynamics are developed to describe the effect of roll moment distributio...

The paper presents results of a pilot project on technological innovation of main flexible components for automotive suspension systems, that are coil springs and stabilizer bars. Current technology has been described and related problems have been outlined. In order to fulfil features as compactness, lightness and environmentally conscious design, solutions based on new forms, materials and ma...

Linking enterprise-wide business decision making with engineering decision making is demonstrated by integrating the enterprise utility optimization and the engineering product development approach under a multilevel optimization framework. The analytical target cascading process is used to set the right targets for the engineering design process that maximize utility at the enterprise level. A...

The paper presents specific aspects regarding the modern modeling & simulation techniques of the mechanical systems, such as digital mock-up and functional virtual prototyping. The following specific aspects are taken into consideration: the advantages of the system-focused simulation techniques relative to the traditional ones, the software components of the virtual prototyping platform and th...

This paper investigates the design of nonlinear controllers for process plant applications that could be modeled by relatively low order uncertain dynamics, such as industrial processes (e.g. level, flow, pressure, etc.) and also some automotive applications (e.g. active suspension). The design technique is based on using a combination of state feedback and Lyapunov-based techniques. The key is...

The automotive hydro-pneumatic integrated suspension model is nonlinear with large dimension. As a consequence, the nonlinear H 1 control methodology based on the traditional Hamilton-Jacoby-Isaacs equation is impractical in this application. An alternative so-called Parameterized Linear Matrix Inequality (PLMI) approach is proposed for solving this hard nonlinear H 1 control problem. The valid...

The value of a self-tuning adaptive semi-active control scheme for automotive suspension systems is discussed in this paper. current vehicle system uses fixed-coeffcient springs and dampers. ability to provide good road handling improve passenger comfort usually valued. Passive allows you choose between these two options. Semi-Active suspension(SAS), on the other hand, can both by manipulating ...