نتایج جستجو برای: forward speed
تعداد نتایج: 319409 فیلتر نتایج به سال:
The functional requirements and system overview for a low cost data communications system for small satellite use are presented. Tradeoffs of system parameters will be discussed such as: cost, transmission speed, power consumption, spectrum useage, and system complexity. Link calculations at 137 MHz, with transmission speeds of 9600 BPS, monopole antennas, and a 50kHz bandwidth show that adequa...
Seven healthy subjects walked forward (FW) and backward (BW) at different freely chosen speeds, while their motion, ground reaction forces, and electromyographic (EMG) activity from lower limb muscles were recorded. We considered the time course of the elevation angles of the thigh, shank, and foot segments in the sagittal plane, the anatomic angles of the hip, knee, and ankle joints, the verti...
The legs of a future generation of hexapedal robots should enable highly articulated walking as well as robust running within the same platform. Following a hypothesis from biology [2], robustness and stability of walking mainly result from feedback control while being anchored in selfstabilizing properties of the feedforward driven mechanical structure in case of running. The advantage of this...
Applications requiring the reliable distribution of data to groups of clients would be supported perfectly by reliable multicast protocols. In many cases, the problem of congestion control (a major research issue otherwise) does not exist because downlink bandwidth is \owned" or can be preallo-cated to a particular server by independent means, but the problems of insuring reliable data delivery...
Interplanetary shock parameters are analyzed for solar maximum (year 2000) and solar minimum (years 19951996) activity. Fast forward shocks are the most usual type of shock observed in the interplanetary medium near Earth’s orbit, and they are 88% of the identified shocks in 2000 and 60% in 1995-1996. Average plasma and magnetic field parameters for upstream and downstream sides of the shocks w...
The plasma flow switch (PFS) utilizes the motion of a high density plasma discharge to accumulate and then release magnetic energy at multimegampere, rrul t imegajoul e 1 eve 1 s •1 Energy input to a coaxial plasma gun occurs in severa l microseconds as t he annular plasma discharge is accelerated axially along the center conductor . Energy is released to a load in a few hundred nanoseconds as ...
telemedicine has changed the way of health care. it is an indispensable tool in the hands of doctors to accelerate and facilitate the process of data interchange. wireless networks consist of small nodes with communications capabilities. development of wireless networks of telemedicine system is highly demanded since these networks promise a wide range of potential applications. in this paper t...
In addition to forward undulatory swimming, eels (and some other elongated swimmers) can swim backwards in a similar way. We compared the kinematics (wave speed, cycle frequency, amplitude, local bending and estimated muscle strain) of forward and backward swimming in the European eel Anguilla anguilla. Both swimming modes are characterised by a wave of undulation that travels over the body in ...
In above rated conditions, wind turbines are often subjected to undesirable high structural loading. We investigate two feedback control techniques in combination with a feedforward control method for reducing blade flap bending loads in above rated wind conditions. The feedback controls studied include both disturbance accommodating/tracking and integral augmented/repetitive types that incorpo...
The simplest strategy for extremum seeking-based source localization, for sources with unknown spatial distributions and nonholonomic unicycle vehicles without position measurement, employs a constant positive forward speed. Steering of the vehicle in the plane is performed using only the variation of the angular velocity. While keeping the forward speed constant is a reasonable strategy motiva...
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