As explored in the journal Scientific Reports in their article, “Vibration Characteristics of an Active Mounting System for Motion Control of a Plate-Like Structure in Future Mobilities,” the transition to electric vehicles (EVs) has led to new challenges in vibration and noise control. Electric motors in EVs produce complex mid-frequency vibrations, often resulting in driver discomfort. Traditional noise, vibration, and harshness (NVH) controls are limited in managing these issues, giving rise to advanced active mounting systems designed to dampen vibrations more effectively.

The study investigated an active mounting system employing a piezoelectric stack actuator to reduce vibration and noise in EVs. A plate structure with both active and passive vibration paths was modeled using the lumped parameter method, simulating mid-frequency vibration scenarios common in EVs. To control these vibrations, the system utilized adaptive algorithms like the normalized least mean square (NLMS) and multi-NLMS to improve motion control. The setup effectively validated that such active mounting systems could enhance EV performance by isolating unwanted vibrations through smart materials.

Active mounting systems using advanced materials, including piezoelectric actuators and magneto-rheological fluids, have shown promising results in minimizing the impact of EV-generated vibrations. The study also reviewed other methods, such as sliding mode control and model predictive sliding mode control, which offer robust control over vibrational forces. These systems can dynamically adjust stiffness and dampening to better control NVH performance, especially in vehicles with lightweight body structures where vibration levels are more pronounced.

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Article with all rights reserved, courtesy of nature.com