Broadband Noise and Vibration Reduction for Lightweight Chassis Design using Smart Structure Technologies

摘要

Lightweight design is gaining more and more importance in the automotive industry. Engineers are trying hard to reduce the increased weight of chassis due to safety and comfort issues.This paper presents new achievements in the field of control design for smart structures, targeting at innovative lightweight, high-performance and low-noise engineering constructions with integrated embedded systems technology:The first part of the paper focuses on new developments in the field of low-cost, highly efficient smart structure power electronics for piezoelectric elements. These elements will be integrated into automotive chassis, which are able to measure any structure-borne disturbance such as vibrations.The second part of the paper presents frontier research in the design of a high-performance control concept for smart structure applications. This innovative control concept based on a nonlinear state observer design, targets at highly robust and broadband suppression of structure-borne noise in terms of fast changing frequencies. The controller performance is not only assessed with respect to stability and disturbance rejection but also with respect to technical feasibility and implementation issues (required sample rate, rounding errors due to inappropriate data formats, latency, etc.).