汽车非线性主动悬架系统的分数阶模糊控制

针对非线性主动悬架系统的控制问题，提出一种分数阶模糊控制方法。该方法采用分数阶微分信号作为模糊控制器输入,并根据悬架系统综合性能指标函数最小准则获得分数阶次。仿真结果表明：相比整数阶的模糊控制情形，即使车辆在不同车速和不同等级道路的行驶工况下，该分数阶模糊控制方法可以使得非线性悬架系统能够获得更优的控制效果，能进一步降低车身垂直振动加速度、动行程及轮胎形变，有效提高车辆的行驶平顺性和操纵稳定性。

Fractional-order Fuzzy Control Method for Vehicle Nonlinear Active Suspension

A fractional-order fuzzy control method was presented for vehicle nonlinear active suspension. This new scheme used a fractional-order differential signal as one of the control inputs, and the fractional order was obtained based on the minimum criteria of the suspension system comprehensive performance index function. Simulation results demonstrate that under the driving cycles with various grade roads and vehicle speeds, comparing with the traditional integral-order fuzzy control method, the presented method has better control performances including further reducing body acceleration, suspension travel and tyre deflection, and can  improve the ride comfort and handling stability of vehicle effectively.