Advanced Control Techniques for Semi-Active Suspension Systems

This paper addresses a comparative study concerning five control techniques applied to high-performance elevators active suspension systems, such as those employed in "skyscrapers". The main objective is to present the different control techniques and analyze the fundamental characteristics of each controller. To accomplish this, the development of the mathematical model of the controlled system is outlined and its integration with the control algorithms is presented. Besides three classic controllers (State Feedback, PID and Sky Hook), due to the significant dynamic behavior dependence on the mass of the passengers in the total mass transported, two adaptive control algorithms are used to compensate the effects of the mass oscillations of the system as the number of passengers varies along the operation cycle. Simulation results are employed to illustrate the behavior of the system when controlled by means of the presented algorithms.

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Model Based Actuator Management for a Hydraulic Active Suspension System: Improving Comfort Performance by Advanced Control

Volume 9: Transportation Systems; Safety Engineering, Risk Analysis and Reliability Methods; Applied Stochastic Optimization, Uncertainty and Probability ◽

10.1115/imece2011-63962 ◽

2011 ◽

Author(s):

Stijn De Bruyne ◽

Jan Anthonis ◽

Marco Gubitosa ◽

Herman Van der Auweraer ◽

Wim Desmet ◽

...

Keyword(s):

Simulation Analysis ◽

Active Suspension ◽

Suspension System ◽

Actuator Dynamics ◽

Handling Performance ◽

Suspension Systems ◽

Active Suspension Systems ◽

Advanced Control ◽

Performance Map ◽

Force Tracking

Active suspension systems aim at increasing safety by improving vehicle ride and handling performance while ensuring superior passenger comfort. This paper addresses the influence of the actuator management on the comfort performance of a complete hydraulic active suspension system. An innovative approach, based on nonlinear Model Predictive Control, is proposed and compared to a classical approach that employs a steady-state performance map of the actuator. A simulation analysis shows how taking into account actuator dynamics improves the actuator’s force tracking performance, leading to an improvement of the overall vehicle comfort performance.

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Advanced Control Techniques for Semi-Active Suspension Systems

Volume 7A: Dynamics, Vibration, and Control ◽

10.1115/imece2020-24447 ◽

2020 ◽

Author(s):

Jessica Gissella Maradey Lazaro ◽

Kevin Sebastián Cáceres Mojica ◽

Silvia Juliana Navarro Quintero

Keyword(s):

Control Technique ◽

External Control ◽

Vehicle Suspension ◽

Driving Experience ◽

Control Techniques ◽

Suspension Systems ◽

Active Suspension Systems ◽

Advanced Control ◽

The Subject ◽

Correct Application

Abstract Semiactive suspension system provides comfort and precise support for any type of driving in vehicles. Their main feature consists in the modification of the damping coefficient by applying an external control. Commonly, these suspensions work with non-linear dampers, such as magnetorheological, electrorheological, pneumatic, dry friction, among others; which generate a discontinuous behavior of force, causing an annoying noise known as “chattering”; however, this can be deleted by the correct application of the control technique. So, control strategy selection is a key task in the modeling of dynamic behavior and to describe the variation of characteristics, as well as to achieve the best vehicle’s driving experience in terms of comfort, performance, reliability, stability, and safety. This article shows three advanced control techniques used to design a semi-active vehicle suspension taking the quarter car as the model. From the review of the state of the art, relevant works and authors on the subject are reported. After, the application of the control techniques is shown together with the results obtained, specially, the performance of the system is carried out by means of computer simulations in the Matlab/Simulink virtual environment, accompanied by near-reality disturbances to verify the effectiveness of this study.

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