A modified energy-saving skyhook for active suspension based on a hybrid electromagnetic actuator

Abstract

This study proposes a modified energy-saving skyhook consisting of active control, energy regeneration, and switch. The modified skyhook coordinates the contradiction between dynamic performance and energy consumption of electromagnetic active suspension. The control principle is analyzed, the switch condition between active control and energy recovery is provided, and the switch control system is designed for simulation. Results demonstrate that the presented strategy can coordinate the dynamic performance and energy consumption effectively. The realization structure, namely, a hybrid electromagnetic actuator, is then designed to satisfy the control requirements. It integrates a linear motor and a hydraulic damper. The linear motor is used for active control or energy regeneration, while the hydraulic damper is used to guarantee basic dynamic performance. The structural dimension of hybrid electromagnetic actuator is optimized to increase air gap flux density with the volume and weight limitation. A prototype is fabricated, and a bench test is conducted. Results show that the structure can satisfy the control requirements. Some errors within a reasonable range are also observed between the test and the simulation because the simulation model is prepared under ideal conditions.

Comparative Analysis of Different Model-Based Controllers Using Active Vehicle Suspension System

“…Let the total ISMC can be obtained by using Equations (33) and (25) in (27) with invoking the effect of robustness:…”

“…LQR is entirely a linear control method whereas FOSMC is a robust control strategy for handling complex systems. Terminal sliding mode control and ISMC are robust techniques of control system, but there is always a discrepancy between the mathematical and physical model, due to mismatched disturbances that cause disparities in the physical model [23][24][25]. It is well known that FOSMC is insensitive to parameter variations and external disturbances.…”

A Novel Endocrine Composite Fuzzy Control Strategy of Electromagnetic Hybrid Suspension

“…Finally, a bench test of 1/4 suspension is performed, and the test results verify the accuracy of the simulation results. In [7], a modified energy-saving skyhook hybrid suspension system consisting of active control and energy regeneration is proposed, then a hybrid electromagnetic actuator is designed to satisfy the control requirements. Finally, a prototype is fabricated and the bench test is conducted, the results show that the structure can satisfy the control requirements, which can coordinate the dynamic performance and energy consumption effectively.…”

Adaptive Frame of Universal Vehicle Course

“…However, it seems that the implementation of our proposals will allow us to significantly advance towards solving this complex problem [7 -12]. Chen et al [13,14] investigated an autonomous active suspension control system in which one engine is used to generate electricity and the other to control vibration. Nakano et al [15] also investigated the self-regulation of vibration using a single motor, in which a variable resistor, charging capacitor, and relay switches were used to control the motor force to follow the required skyhook attenuation force.…”