In this paper the design of a biped robot actuated with Shape Memory Alloy (SMA) springs with minimum degrees of freedom is presented. SMA springs are a class of smart materials that are known for their high power to mass and volume ratios. It was shown that utilizing spring type of SMAs have many advantages as large deformation, smooth motion, silent and clean movement compared to ordinary typ...

A flapping wing micro air vehicle (FWMAV) demands high lift and thrust generation for a desired payload. In view of this, the present work focuses on novel way enhancing characteristics through integrating check-valves in membrane. Modal analysis static are performed to determine natural frequency deformation check-valve. Based inference, check-valve opens closes during upstroke downstroke flap...

Most technological manufacturing lines include hydraulically operated stationary tools, devices and equipment. During a cycle, there are phases, usually short, in which part of the hydraulic cylinders drive systems concerned, with small gauges displacement speeds, have to generate / maintain high clamping or pressing forces, implies functioning at working pressures. The solution for such is use...

The efficiency of aortic valve closure was studied in five experiments on three normal dogs by simultaneous roentgen videodensitometry, upstream sampling of dye dilution and recording of flow velocity and direction in the ascending aorta using a chronically implanted electromagnetic flowmeter. The aortic valve closed effectively during regular ventricular contractions. However, aortic reflux wa...

In this paper, we report a cooperative manipulation method for non-contact robotic electromagnetic needle system. We employ two 3 degrees of freedom (DOF) needles to achieve an over-actuated manipulator, which can move the particle any position in planar workspace from direction. The redundant DOFs, combined with optimization-based control approach, enable manipulator accurate path following an...

Abstract Raising the maximum valve lift in two-stroke drive mode is key to increasing power output of variable-stroke engine, so limit design train device critical. The multi-objective genetic optimization algorithm NSGA-2 was coupled with single-freedom dynamics model device. A rapid program for constructed Matlab. Two methods explored mode. first optimize rocker structure, and second cam posi...

This paper describes torque-actuated valves for controlling the flow of fluids in microfluidic channels. The valves consist of small machine screws (> or =500 microm) embedded in a layer of polyurethane cast above microfluidic channels fabricated in poly(dimethylsiloxane) (PDMS). The polyurethane is cured photochemically with the screws in place; on curing, it bonds to the surrounding layer of ...