Development of a systematic and practical methodology for the design of vehicles semi-active suspension control system

In this paper, a novel systematic and practical methodology is presented for design of vehicle semi-active suspension systems. Typically, the semi-active control strategies developed to improve vehicle ride comfort and stability have a switching nature. This makes the design of the controlled suspension systems difficult and highly dependent on an extensive trial-and-error process. The proposed methodology maps the discontinuous control system model to a continuous linear region, where all the time and frequency design techniques, established in the conventional control system theory, can be applied. If the semi-active control system is designed to satisfy some ride and stability requirements, an inverse mapping offers the ultimate control law. At the end, the entire design procedure is summarised in six steps. The effectiveness of the proposed methodology in the design of a semi-active suspension system for a Cadillac SRX 2005 is demonstrated with road tests results. Real-time experiments confirm that the use of the newly developed systematic design method reduces the required time and effort in real industrial problems.

本文提出了一种新颖的、系统的且实用的车辆半主动悬架系统设计方法。通常，为提高车辆乘坐舒适性和稳定性而开发的半主动控制策略具有切换特性。这使得受控悬架系统的设计变得困难，且在很大程度上依赖于大量的试错过程。所提出的方法将不连续控制系统模型映射到一个连续线性区域，在该区域中，传统控制系统理论中建立的所有时域和频域设计技术都可以应用。如果半主动控制系统被设计为满足某些乘坐和稳定性要求，逆映射可提供最终的控制律。最后，整个设计过程总结为六个步骤。通过道路试验结果证明了所提出的方法在2005款凯迪拉克SRX半主动悬架系统设计中的有效性。实时实验证实，使用新开发的系统设计方法减少了实际工业问题中所需的时间和精力。