Ultrasonic motor’s model adapting to control application is the foundation of the motor’s high performance control. Ultrasonic motor’s frequency-speed control model gives a signification to improve speed control performance. This paper shows the design of stepping response experiments, and also explains the model identification of USM by the way of characteristic point method. Considering its t...

Whereas humans continuously adapt their behaviour within a dynamic environment, robots have traditionally been rigidly programmed to perform prede ned tasks. A new approach, learning by imitation, has recently been proposed to enable robots to learn novel behaviours by observing other agents { be they human or robot { operating in their environment. Our paper focuses on how a robot agent can de...

Objectives: The aim of this study was to evaluate the effect of “Kashi practices” on the improvement of psycho-motor skills in people with Down syndrome. Methods: In this research, 28 men with Down syndrome between 21 and 43 years of age (mean age 25.917±3.889) were randomly assigned to either a control (n=14) or an experimental group (n=14). All persons in the experimenta...

A new type of rotary motor by inchworm motion using two belts is developed. A rotor is wrapped by two opposite belts which are connected to piezoelectric actuators. A serial lever structure with flexure hinges is used to connect a belt and piezoelectric actuators. The lever structure amplifies micro displacement of a piezoelectric actuator. A rotational motion with the step size of 2.36 mrad is...

The cargo motion in living cells transported by two species of motor protein with different intrinsic directionalities is discussed in this study. Similarly to single motor movement, the cargo steps forward and backward along a microtubule stochastically. Recent experiments found that cargo transportation by two motor species has a memory; it does not change its direction as frequently as expec...

Cytoplasmic dynein, the 1.2 MDa motor driving minus-end-directed motility, has been reported to move processively along microtubules, but its mechanism of motility remains poorly understood. Here, using S. cerevisiae to produce recombinant dynein with a chemically controlled dimerization switch, we show by structural and single-molecule analysis that processivity requires two dynein motor domai...

Single stepping a motor results in jerky movements of the motor, especially at lower speeds. Microstepping is used to achieve increased step resolution and smoother transitions between steps. In most applications, microstepping increases system performance while limiting noise and resonance problems. The paper presents a method for calculation the values of the phase currents for microstepping ...

We examine the possibility that sensory and motor adaptation may be induced via a sinusoidally incremented perturbation. This sinewave adaptation method provides superior data for fitting a parametric model than when using the standard step-function method of perturbation, due to the relative difficulty of fitting a decaying exponential vs. a sinusoid. Using both experimental data and simulatio...

Behavioral variability is ubiquitous [1-6], yet variability is more than just noise. Indeed, humans exploit their individual motor variability to improve tracing and reaching tasks [7]. What controls motor variability? Increasing the variability of sensory input, or applying force perturbations during a task, increases task variability [8, 9]. Sensory feedback may also increase task-irrelevant ...