Abstract The McKibben pneumatic actuator (MPA) is a soft used for performing various practical functions in robots. Particularly, many dynamic robots have been realized using MPAs. However, there trade-off between torque generated by MPA and the range of motion joint. In this study, we focus on jumping leg-type robot use an elliptical pulley whose moment arm changes depending robot’s posture. T...

We present and discuss a non-expensive mechanical experiment which is very suitable for classroom demonstration of the fold catastrophe behaviour. The apparatus consists bar attached to pulley, hanging body connected by means thread wrapped around its rim. system may perform stable oscillations or, else, continuously fall down, while pulley executes sequence 360° rotations. This behaviour analy...

PURPOSE Connective tissue pulleys serve as the functional mechanical origins of the extraocular muscles (EOMs). Anterior to these pulleys, EOM paths shift with gaze to follow the scleral insertions, whereas posterior EOM paths are stable in the orbit. Inflections in EOM paths produced by gaze shifts can be used to define the functional location of pulleys in three dimensions (3-D). METHODS Co...

Article history: Received: 14.12.2015. Received in revised form: 08.04.2016. Accepted: 05.05.2016. Experimental measurements focused on the investigation of fiber behaviour are performed on an assembled weight-fibre-pulley-drive mechanical system. The carbon fibre driven by one drive is led over a pulley. At its other end there is a prismshaped steel weight which moves in a prismatic linkage on...

The oculomotor periphery was formerly regarded as a simple mechanism executing complex behaviors explicitly specified by innervation. It is now recognized that several fundamental aspects of ocular motility are properties of the extraocular muscles (EOMs) and their associated connective tissue pulleys. The Active Pulley Hypothesis proposes that rectus and inferior oblique EOMs have connective t...

Dynamic high-resolution ultrasonography findings obtained in 34 extreme rock climbers with finger injuries were compared with those in 20 healthy volunteers. Thicknesses of the flexor tendon and A-2 flexor tendon pulley system were measured at the base of the proximal phalanx. The distance between the tendon and phalanx was evaluated with the finger in extension and in forced flexion as a measu...

Active orthotic devices for joint articulation have a vast number of applications that could benefit many people. Examples include joint articulation for people suffering from disabilities, increased load carrying capacity and walking distance for humans, and gait training. The main goal of this research is to help people with disabilities regain natural walking ability by replicating normal wa...

A set of examples is provided that illustrate the use of work as applied to simple machines. The ramp, pulley, lever and hydraulic press are common experiences in the life of a student and their theoretical analysis therefore makes the abstract concept of work more real. The mechanical advantage of each of these systems is also discussed so that students can evaluate their usefulness as machine...

nowadays, automakers have invested in new technologies in order to improve the efficiency of their products. giant automakers have taken an important step toward achieving this objective by designing continuously variable transmission systems (cvt) to continuously adapt the power of the engine with the external load according to the optimum efficiency curve of engine and reducing fuel consumpti...

As an in-situ exploration way, landers and rovers are well used in lunar or planetary explorations. In lunar or planetary exploration missions, it is important to save the weight of spacecraft. Then, the authors go ahead with uniting landers and rovers. In other words, the landing device and the suspension mechanism should be commonalized. As a new mechanism for lander-rover-unite system, a nov...