Energy-Saving Robust Saturated Control for Active Suspension Systems via Employing Beneficial Nonlinearity and...

Area of Science:

• Control Engineering
• Mechanical Systems
• Biomimetics

Background:

• Active suspension systems require advanced control for optimal performance.
• Existing methods often struggle with energy efficiency and real-world disturbances.
• Integrating nonlinearities and disturbance effects presents a control design challenge.

Purpose of the Study:

• To propose a novel control framework for active suspension systems.
• To enhance control performance by utilizing beneficial nonlinearity and disturbance effects.
• To address practical control issues such as energy savings and actuator saturation.

Main Methods:

• Development of a novel amplitude-limited Proportional-Derivative Sliding Mode Control (PD-SMC) scheme.
• Incorporation of a bioinspired reference model with nonlinear stiffness and damping.
• Utilization of disturbance response for improved control outcomes.
• Theoretical stability analysis using Lyapunov-based methods.

Main Results:

• The proposed control scheme ensures stable, performance-oriented tracking control.
• Simultaneous improvement in convergence speed and reduction in control energy cost.
• Effective handling of actuator saturation and unexpected disturbances.
• Experimental validation demonstrating superior performance compared to existing methods.

Conclusions:

• The novel control framework offers a unique approach to active suspension control.
• Exploiting beneficial nonlinear and disturbance effects leads to better performance and lower energy consumption.
• This method provides a practical and effective solution for active suspension system design.