How to improve the dynamic performance of nonlinear suspension systems is a focus of attention. The combination of inerter and on–off control strategy can effectively improve the dynamic performance of linear suspension systems, but it will also bring some adverse effects. This paper puts forward a nonlinear suspension system performance enhancement scheme based on semi-active on–off control strategies of inerter to eliminate the adverse effects of the introduction of the inerter and to enhance the dynamic performance of nonlinear suspension systems. This paper takes the nonlinear double-diamond bionic kangaroo leg suspension system as an example and adopts the above scheme to carry out dynamic modeling, time–frequency domain dynamic characteristics analysis, and control characteristics research. The results show that the dynamic performance of the proposed nonlinear suspension system with passive inerter is partially better than that of the original suspension system in time–frequency domain, while the overall dynamic performance of the proposed nonlinear suspension system with semi-active inerter is better than that of the original suspension system. The proposed nonlinear suspension system with semi-active inerter shows good stability and adaptability under different working conditions, and the proposed control strategies can eliminate the adverse effects of passive inerter. The above results indicate the correctness of the proposed scheme and the effectiveness of the control strategies.

中文翻译：

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基于惯性和开关控制策略的非线性仿生悬架性能改进研究

如何提高非线性悬架系统的动态性能是人们关注的焦点。惯性和开关控制策略的结合可以有效提高线性悬架系统的动态性能，但也会带来一些不利影响。本文提出了一种基于惯性器半主动开关控制策略的非线性悬架系统性能增强方案，以消除惯性器引入的不利影响，增强非线性悬架系统的动态性能。本文以非线性双金刚石仿生袋鼠腿悬挂系统为例，采用上述方案进行动力学建模、时频域动态特性分析和控制特性研究。结果表明，所提出的被动惯性非线性悬架系统的动态性能在时频域上部分优于原悬架系统，而半主动惯性非线性悬架系统的整体动态性能更好比原来的悬挂系统。所提出的半主动惯性器非线性悬架系统在不同工况下表现出良好的稳定性和适应性，并且所提出的控制策略可以消除被动惯性器的不利影响。上述结果表明了所提方案的正确性和控制策略的有效性。