In order to improve the ride comfort of the driver, a higher-order Sliding Mode Controller was proposed in this study for a semiactive magnetorheological (MR) suspension system. The work is mainly focused on improving the ride comfort of the driver with simultaneous improvement in road holding capability of the vehicle and to study the effects of using Super Twisting Sliding Mode Controller (STSMC) in a quarter car with driver seat model. The modified Bouc-Wen model was simulated using MATLAB/Simulink software and the STSMC was adopted to control the voltage variation in MR damper using Continuous State Control (CSC) algorithm. The controller and the suspension system parameters were analysed in time domain with random road inputs. Fast Fourier Transform (FFT) analysis was also carried out to show the effectiveness of the controller towards improving the driver seat comfort. The STSMC-controlled MR damper was used as a primary suspension and the effectiveness of its controllability was compared with passive suspension system. The uncontrolled MR suspension system was also analysed in order to verify the fail-proof advantage of the MR damper. From the results, it was found that the ride comfort was extremely improved when STSMC controller was used than when the uncontrolled MR and passive suspension systems were employed. The uncertainty of the STSMC was verified for different passenger masses and it achieved a robust control over load variation. The selected STSMC was validated with the first-order Sliding Mode Controller and the results were discussed in terms of time-domain analysis.

为了提高驾驶员的乘坐舒适性，本研究针对半主动磁流变（MR）悬架系统提出了一种高阶滑模控制器。这项工作主要致力于提高驾驶员的乘坐舒适性，同时提高车辆的持路能力，并研究在具有驾驶员座椅模型的四分之一汽车中使用超级扭曲滑模控制器（STSMC）的效果。使用MATLAB / Simulink软件对改进的Bouc-Wen模型进行了仿真，并采用STSMC通过连续状态控制（CSC）算法来控制MR阻尼器中的电压变化。在时域内使用随机道路输入对控制器和悬架系统参数进行了分析。还进行了快速傅立叶变换（FFT）分析，以显示控制器在改善驾驶员座椅舒适度方面的有效性。将STSMC控制的MR阻尼器用作主要悬架，并将其可控制性的有效性与被动悬架系统进行了比较。还分析了不受控制的MR悬挂系统，以验证MR阻尼器的防故障优势。从结果可以发现，与使用不受控制的MR和被动悬架系统相比，使用STSMC控制器时，乘坐舒适性得到了极大的改善。验证了STSMC在不同乘客量下的不确定性，并实现了对负载变化的鲁棒控制。