Valve´s dynamic damping characteristics — Measurement and identification

This paper proposes a novel method to test the dynamic damping characteristics of valve. The testing system employs the vertical movement pattern, and has a suspension support structure. Force sensors are installed to measure the dynamic friction of the working valve directly. Making use of LuGre friction model and both adaptive genetic algorithm and chaos particle swarm optimization algorithm, the valve´s dynamic damping parameters can be identified. Experiments have been carried out on a piston rod with a rubber ring and a steel cylinder. The results demonstrate the designed dynamic damping test system and the parameter identification algorithms are effective.