Motor-Integrated Active Damper Design for Coil-Over Suspension Systems
摘要
To enhance ride quality, suspension systems are used in various automobiles in day-to-day life. These include two kinds: active and passive. To increase shock-absorbing effectiveness over passive systems, active suspension systems were developed, which adeptly manage components electronically allowing for greater precision and control in aspects like stiffness, ride height, and body roll etc. that are important to stable and comfortable rides. Present-day active suspension systems like hydraulic and pneumatic systems, however, exhibit disadvantages that include a severe lack of cost-effectiveness, very high maintenance costs, and lack of versatility in implementation. This research aims to address these using a relatively economical active suspension system design created using an innovative motor-based setup. The proposed configuration involves a rack and pinion arrangement through which the motor acts as an active damper, controlling the compression and rebound of any coil-over suspension spring unit. Its functionality and working are tested based on simulated and experimental damping characteristics. To evaluate the former, a mathematical model is tested in Simulink. Then it is compared to an experimental setup of the same where the CRO provides the exact voltage needed by the motor to appropriately damp the specific force exerted by the load. The predicted relationship between the load force and voltage required is verified using a creative pre-experiment in which the motor acts as a generator. Conclusively, the results of the damping experiments show that the proposed motor-integrated active damper performs 78.65% better than traditional passive suspension systems for the same load force.