Modern Semi-Active Control Schemes for a Suspension with MR Actuator for Vibration Attenuation

Abstract

This article describes semi-active modern control schemes for a quarter-vehicle suspension with a magnetorheological damper (MRD) to attenuate vibrations and simultaneously improve the passenger comfort and the vehicle road-holding. The first solution is a multiple positive position feedback (MPPF) control scheme to attenuate the vibration amplitude at the two modal frequencies. The second solution is based on elementary passivity considerations on the exact regulation error dynamics passive output. The passive output feedback is used to improve the control aims. Finally, the third solution deals with a disturbance rejection control (DRC) based on an extended state observer. The three proposed control schemes consider an inverse polynomial model of a commercial MRD for numerical implementation and are evaluated by comfort and road-holding performance indexes proposed in the literature. Furthermore, the effects of variation in the sprung mass (emulating different number of passengers) on the controllers’ performance is analysed. The numerical results show in both scenarios (constant and variable sprung mass) that passivity based control (PBC) and DRC improve the performance indexes compared with the classical sky-hook control and the open-loop systems with a different constant current input for the MRD. Obtained results for damping force and power consumption are within the operation range of the considered commercial MRD showing the viability for experimental implementation of the proposed control schemes.

Sensorless Tracking Control for a “Full-Bridge Buck Inverter–DC Motor” System: Passivity and Flatness-Based Design

“…This control strategy was studied initially by Sira-Ramírez (see the seminal work of Sira-Ramírez [60] for the underlying theoretical considerations and see [61] for the potential of this technique in applications). Among the numerous applications in automatic control that have been developed regarding the ETEDPOF technique, one can find those associated with traditional power electronics [61], DC motors driven by DC/DC power converters [14], [26], [32], [37], [43], [48], [51], [52], single phase active rectifiers [62], three-phase Boost rectifiers [63], airships [64], mobile robotics [65], renewable energy systems [66], separately excited DC motors [67], induction motor powered by photovoltaic panels [68], transformerless multilevel active monophase rectifiers [69], permanent magnet synchronous motors [70], and magnetorheological automotive suspensions [71]. Thus, inspired by the control applications based on the ET-EDPOF methodology, in this paper a sensorless passivitybased control that considers the ETEDPOF strategy and flatness is proposed for the new "full-bridge Buck inverter-DC motor" system.…”

“…• The potential applications of this strategy is wide, since most of power electronics devices (such as DC/DC converters, DC/AC converters, and AC/DC converters) and interesting combinations of these devices with DC and AC motors are accurately described by the special "energy managing" structure (2). Moreover, nowadays, the ETEDPOF control law has applications in airships [64], mobile robotics [65], renewable energy systems [66], [68], and magnetorheological automotive suspensions [71].…”

The Braking-Pressure and Driving-Direction Determination System (BDDS) Using Road Roughness and Passenger Conditions of Surrounding Vehicles

“…Kevin Herubiel Floreán-Aquino et al described semi-active modern control schemes for a quarter-vehicle suspension with a magnetorheological damper (MRD) to attenuate vibrations and simultaneously improve the passenger comfort and the vehicle road holding [18]. The proposed control schemes were compared with a traditional sky-hook semi-active control, showing a considerable improvement in the closed-loop system performance at the two main vibration modes simultaneously.…”

The Dynamic Model and Control Algorithm for the Active Suspension System

“…Another suspension system that can change the stifness of the dampers is called a semi-active suspension system. Tis suspension system uses electromagnetic dampers to replace conventional linear dampers [6]. According to Yang et al, the current provided to the damper can change the arrangement of the surrounding metal particles.…”