Optimal Design of Fractional-Order Electrical Network for Vehicle Mechatronic ISD Suspension Using the Structure-Immittance Approach

Abstract

In order to more effectively design the structure of vehicle ISD (Inerter Spring Damper) suspension system using the inerter, this paper proposed a design method using a fractional-order electrical network structure of a mechatronic inerter for fractional-order electrical network components, according to the characteristics that the external electrical network of a mechatronic inerter can simulate the corresponding mechanical network structure equivalently. First, the 1/4 dynamic model of the suspension is constructed. The improved Oustaloup filtering algorithm is used to simulate fractional calculus, and the fractional order components are simulated. Then, the simulation model of the vehicle mechatronic ISD suspension is established. In order to simplify the electrical network, one resistance, one fractional inductance and one fractional capacitance are limited in the design of the fractional electrical network at the outer end of the mechatronic inerter. The structure-immittance approach is used to obtain two general layouts of all possible structures of three elements. At the same time, the optimal fractional electrical network structure and parameters are obtained by combining the optimization algorithm. The simulation results verify the performance of the fractional ISD suspension with the optimized structure, which can provide a new idea for the structural design of a fractional-order electrical network applied in vehicle mechatronic ISD suspension.

Advanced X-by-Wire Technologies in Design, Control and Measurement for Vehicular Electrified Chassis

“…Numerical simulations show that the mechatronic inerter improved the vibration isolation performance of the suspension compared to a passive suspension and increased the transfer function-order of the external electrical network further by reducing seat acceleration and pitch acceleration RMS values. Reference [2] proposes a design method for vehicle ISD (Inerter Spring Damper) suspension systems that utilize the fractional-order electrical network structure of a mechatronic inerter. This method used the inerter's external electrical network to simulate the corresponding mechanical network structure equivalently.…”

Dynamic Performance Analysis of Semiactive Vehicle ISD Suspension Based on the Power-Driven-Damper Strategy

“…Vehicle suspension is an essential component of the chassis system, and it can bufer the impact of road roughness [1,2] and play a decisive role in providing passengers with excellent ride comfort performance [3,4]. Terefore, improving the performance of suspension has important engineering signifcance.…”