Optimization of Crank Mechanism of Multifunctional Nursing Bed Based on ADAMS

Abstract

The crank mechanism of multifunctional nursing bed is an important institution to assist patients exercising their legs. In order to optimize the function of the crank mechanism and improve the quality of rehabilitation, the kinematic relationship of the crank mechanism has been studied and the virtual prototype of the crank mechanism is established by using the design variables instead of the coordinates' value based on ADAMS [1, 2]. The influence of related design variables on the angle acceleration of thigh plate is studied by virtual prototyping. The sensitivity of related design variables to the angle acceleration of the thigh plate is obtained and those variables with larger sensitivity are optimized to be the best value. The maximum value of the angular acceleration is reduced and the curve is gentler. The mechanism is running more smoothly and the crank mechanism has been optimized.