馈能式半主动悬架振动自适应最优容错控制

doi:10.19562/j.chinasae.qcgc.2024.01.010

Abstract

Abstract:

In order to realize effective vibration mitigation of self-powered semi-active suspension under uncertain factors， the suspension mechanical-electrical coupling dynamic model is established. The influence of electrical parameters on energy conversion efficiency is explored. The adaptive fault tolerant control gain is deduced， and then the vibration isolation capability of the suspension is investigated in time and frequency domain respectively. The robust index of adaptive optimal fault tolerant control algorithm is obtained by constructing Lyapunov equation to stud the influence of key parameters on robust index. The results show that the electrical parameters have obvious influence on the energy conversion efficiency， with the suspension having higher energy conversion efficiency at the second natural frequency. The proposed adaptive optimal fault tolerant control strategy can realize effective vibration suppression in both the time and frequency domain， with better vibration isolation performance compared to passive control and self-powered mode. The control robust index is affected by the inductance of generator and outer diameter of permanent magnet most significantly.

Key words: suspension system, semi-active vibration isolation, self-powered MR damper, vibration isolation performance, uncertain factors

Xiang Gao, Xiang Zhang, Dongxu Wei, Junchuan Niu, Lei He. Adaptive Optimal Fault Tolerant Vibration Control of Semi-active Suspension with Self-powered Characteristics[J].Automotive Engineering, 2024, 46(1): 92-99.

Figures/Tables 10

参数	数值
磁流变液黏度 $η$	$0.2 ?? P a ? s$
阻尼通道长度 $l$	$3.5 × 10 - 2 ?? m$
活塞有效面积 $A$	$0.8 ?? m m 2$
阻尼器流道间隙 $h$	$10 - 3 ?? m$
阻尼器线圈匝数 $N c$	$230$
磁流变液切应力系数 $C 0$	$- 1.2 × 103$
磁流变液切应力系数 $C 1$	$0.39$
磁流变液切应力系数 $C 2$	$- 8.4 × 10 - 7$
磁流变液切应力系数 $C 3$	$2.9 × 10 - 13$

参数	数值
簧载质量 $m s$	$400 ?? k g$
非簧载质量 $m u$	$70 ?? k g$
悬架刚度 $k s$	$20 ?? 000 ?? N · m - 1$
轮胎刚度 $k t$	$105 ?? N · m - 1$
整流电容 $C$	$4 ?? m F$
馈能模块电感 $L G$	$45 ?? m H$
馈能模块电阻 $R G$	$1.5 ?? Ω$
阻尼器电感 $L 0$	$100 ?? m H$
阻尼器电阻 $R 0$	$2.5 ?? Ω$
整流电路损失率 $η c$	$0.1$
下截止频率 $n 0$	$0.011 ?? m - 1$
参考空间频率 $n 1$	$0.1 ?? m - 1$
车速 $v$	$16.7 ?? m · s - 1$
路面不平度系数 $G q$	$64 × 10 - 6 ?? m 3$

参数	$l$	$h$	$D 1$	$L G$	$R G$
极差	1.78	1.69	2.17	2.19	1.09

References 26

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Adaptive Optimal Fault Tolerant Vibration Control of Semi-active Suspension with Self-powered Characteristics

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