...Xiangxu Qu; Dongxing Cao; Ruheng Qu; Guyu Zhang; Shan Zhang The nonlinear stiffness actuator (NSA) is a type of compliant joint with variable stiffness that is necessary for human–machine collaboration and has been the focus of extensive research attention. This academic work presents the principle...

...   deg ) but it quickly drops as θ 4 increases, as shown in Fig. 5b . Hence, this nonlinear stiffness can be realized by the double-slider mechanism with a spring. ( a ) Spring torque and force versus transmission angle and ( b ) equivalent stiffness of nonlinear spring system...

... nonlinearity nonlinear stiffness Nonlinear springs enhance the performance of many applications, including prosthetics and artificial implants ( 1 ), microelectromechanical systems (MEMS) devices ( 2 3 ), statically balanced mechanisms ( 4 ), designs for crashworthiness ( 5 ), robotic joints ( 6...

... design engineering finite element analysis genetic algorithms springs (mechanical) compliant mechanism nonlinear spring nonlinear spring synthesis geometric nonlinearity nonlinear stiffness Compliant mechanisms are jointless, one-piece mechanisms that transfer force and motion via...