[Purpose] This study aimed to determine whether or not problems with gait and balance occur when incorrect information is given visually. [Subjects and Methods] Fifty healthy adults wore goggles that caused visual distortion and viewing angle reduction, and their balance and gait velocities were measured in an upright position. The goggles could be set to three different levels of visual distor...

We propose a new parameterization for describing forward and backward leanings of the straight human body with the feet fixed on the ground. During this motion stability of static equilibrium of the upright human body depends on the basic parameters such as coordinates XCG and YCG of the center of gravity of the body in the upright position and the radius R of the base of support. We introduce ...

Able-bodied individuals spontaneously adopt crouch gait when walking with induced anterior trunk flexion, but the effect of this adaptation on lower-limb kinetics is unknown. Sustained forward trunk displacement during walking can greatly alter body center-of-mass location and necessitate a motor control response to maintain upright balance. Understanding this response may provide insight into ...

A cart-double pendulum system is an underactuated mechanical that has three degrees of freedom (DOF) and two actuators. This paper discusses the stabilizing control problem for this non-linear system. First, input relationship constructed to transform 3-DOF into a 2-DOF reduced-order in fixed time. Second, swing-up controller designed make infinitely approach upright equilibrium point. After th...

Mechanical properties of the muscle-tendon unit change with aging, but it is not known how these modifications influence the control of lower leg muscles during upright stance. In this study, young and elderly adults stood upright on a force platform with and without vision while muscle architecture and myotendinous junction movements (expressed relative to the change in the moment on the x-axi...

This paper proposes an approach for the minimum time swing upof a rotary inverted pendulum. Our rotary inverted pendulum is supported bya pivot arm. The pivot arm rotates in a horizontal plane by means of a servomotor. The opposite end of the arm is instrumented with a joint whose axisis along the radial direction of the motor. A pendulum is suspended at thejoint. The task is to design a contro...