Passive flow control techniques, and particularly vortex generators have been used successfully in a broad range of aero- hydrodynamics applications to alter the characteristics boundary layer separation. This study aims review how such techniques can mitigate extent impact cavitation incompressible flows. focuses first on characterize key physical principles. It then considers complete passive...

This paper investigates the stability of distributed direct user-to-user networked haptic interaction with remote dynamic proxies and passive wave domain communications. Considering fixed communication delays and fixed and low data transmission rate over the network, the paper develops the multirate state space model of the haptic system and uses eigenvalue analysis to determine the maximum sti...

To study intersegmental coordination in humans performing different locomotor tasks (backward, normal, fast walking, and running), we analyzed the spatiotemporal patterns of both elevation and joint angles bilaterally in the sagittal plane. In particular, we determined the origins of the planar covariation of foot, shank, and thigh elevation angles. This planar constraint is observable in the t...

To study intersegmental coordination in humans performing different locomotor tasks (backward, normal, fast walking, and running), we analyzed the spatiotemporal pattern of both elevation and joint angles bilaterally in the sagittal plane. In particular, we determined the origins of the planar covariation of foot, shank and thigh elevation angles. This planar constraint is observable in the thr...

in this paper the optimal design of a dissipator made of aluminium and steel and principallysubjected to shear forces and the preliminary results of the characterization tests are described.the device has been designed on the basis of an optimization procedure with the objective tomaximize the energy dissipated in the device. the response of a 3d frame equipped with thedevice and subjected to 7...

This dissertation explores the challenges of one of the most difficult classes of real-world tasks for multirobot teams: those that require long-term planning of tightly-coordinated actions between teammates. These tasks involve solving a distributed multi-agent planning problem in which the actions of robots are tightly coupled. Moreover, because of uncertainty in the environment and the team,...

One of the major breakthroughs in the problem of control of bilateral teleoperators with guaranteed stability properties has been the use of scattering signals to transform the transmission delays into a passive transmission line. Under the reasonable assumption that the human operator and the contact environment define passive (force to velocity) maps, stability of the overall system is then e...

The traditional strengths of passive theory can be further extended when applied to switched systems. Some background will be covered on this recent generalization of passivity using multiple storage functions. The passivity-based control application considered in this paper is in distributed systems. A constructive method is covered to solve the output synchronization problem for networked mec...

Piezoelectric actuators are widely used in micro manipulation applications. However hysteresis nonlinearity limits accuracy of these actuators. This paper presents a novel approach utilizing a piezoelectric nano-stage as slave manipulator of a teleoperation system. The Prandtl-Ishlinskii (PI) model is used to model actuator hysteresis in feedforward scheme to cancel out this nonlinearity. A pas...