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Published in Philip A. Laplante, Comprehensive Dictionary of Electrical Engineering, 2018
parallel I/O interface I/O interface consisting of multiple lines to allow for the simultaneous transfer of several bits. Commonly used for highspeed devices, e.g., disk, tape, etc. See also serial I/O interface. parallel input/output generic class of input/output (I/O) operations that use multiple lines to connect the controller and the peripheral. Multiple bits are transferred simultaneously at any time over the data bus. parallel interference cancellation a multiple access interference cancellation strategy for CDMA based on multistage detection. In the first stage, tentative decisions are made for each user in parallel. For each user, an estimate of the resulting multiple access interference is made and substracted from the received signal. In the succeeding stage, a more reliable tentative decision can then be made for each user. This proceeds successively for a predetermined number of stages. parallel manipulator manipulator that consists of a base platform, one moving platform and various legs. Each leg is a kinematic chain of the serial type, whose end links are the two platforms. Parallel manipulators contain unactuated joints, which makes their analysis more complex than those of serial type. A paradigm of parallel manipulators is the flight simulator consisting of six legs actuated by hydraulic pistons.
A virtual power algorithm for dynamics analysis of a 3-RRcP spherical parallel robot using the screw theory
Published in Australian Journal of Mechanical Engineering, 2020
A parallel manipulator typically consists of a moving platform and a fixed base that are connected together by several legs. Because of the closed-loop architecture, not all joints are actuated. In general, the number of actuated joints is equal to the number of degrees of freedom of the manipulator. Over the past decades, parallel mechanisms have received more and more attention from researchers and industries. They can be found in several practical applications, such as flight simulators (Dongsu and Hongbin 2007), positional trackers (Carretero et al. 2000), telescopes (Dunlop and Jones 1999) and micro-motion devices (Lee and Arjunan 1991); as well as in the development of high-precision machine tools (Huang et al. 2004).
Kinematic modeling and dexterity evaluation of a PS-RRS-2RUS parallel manipulator used for controllable pitch propeller
Published in Mechanics Based Design of Structures and Machines, 2018
Chuanping Zhang, Yuan Chen, Han Xu, Mingduo Hu, Rongmin Zhang
Low-mobility parallel manipulator has some advantages, such as a simple structure and low production cost. It is the most preferred mechanism to be the manipulator between swash plate and actuators on the base platform. In the conceptual design of the parallel manipulator, the method of adding constraints based on screw theory was applied and the propeller shaft was primarily considered as one of the chains.