Every physical phenomenon in our universe—from the sound of a cello and the rumble of an industrial turbine to the radio waves carrying mobile data—manifests as an analog signal. These signals are continuous in both time and amplitude, flowing in an unbroken stream of physical reality. However, to analyze, process, or store these signals using … Read more
Vibration testing is a important subject of mechanical engineering, automotive design, aerospace safety, and structural health monitoring. It allows engineers to evaluate how materials, components, and systems respond to dynamic loads. However, raw vibration data is often complex, noisy, and difficult to interpret. This is where signal processing becomes indispensable: it transforms raw sensor outputs … Read more
Abstract Ride comfort plays important role in designing the vehicle seat and it can be affected by both statics and dynamic factors. The comfort of a seat is mainly contributed by the seat cushion foam and nowadays, the common material used as seat cushion is open celled polyurethane foam. Under dynamic condition, seat dynamic behaviour … Read more
Abstract The vibration transferred to the car floor transmits to the human body through the seat structure, and the typical design of the seat structure consists of several components such as seat frame and seat cushion. The material widely used as seat cushion is open-cell polyurethane (PUR) foam; when under vibration, it will behave dynamically. … Read more