Download PDF by J. -P. Merlet (auth.): Parallel Robots

By J. -P. Merlet (auth.)

ISBN-10: 1402041322

ISBN-13: 9781402041327

ISBN-10: 1402041330

ISBN-13: 9781402041334

Parallel robots are closed-loop mechanisms proposing first-class performances when it comes to accuracy, speed, stress and skill to govern huge rather a lot. they've been utilized in various functions starting from astronomy to flight simulators and have gotten more and more renowned within the box of machine-tool undefined. This booklet offers an entire synthesis of the newest effects at the attainable mechanical architectures, research and synthesis of this sort of mechanism. it truly is meant for use via scholars (with over a hundred and fifty routines and various web addresses), researchers (with over 650 references and nameless ftp entry to the code of a few algorithms awarded during this ebook) and engineers (for which functional effects, error to prevent, and purposes are presented).

Since the e-book of the 1st version (2000) there was a magnificent elevate when it comes to examine and use of this type of constitution which are pronounced during this ebook. This moment version has been thoroughly overhauled. The preliminary bankruptcy on kinematics has been break up into Inverse Kinematics and Direct Kinematics. a brand new bankruptcy on calibration used to be extra. the opposite chapters have additionally been rewritten to a wide volume. The reference part has been up to date to incorporate round forty five% new works that seemed after the 1st edition.

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Extra resources for Parallel Robots

Example text

2: Show that the mobility of fully parallel spatial robots with identical chains is null when each actuator is locked. 1). f. f. and then a comprehensive enumeration of parallel robots mechanical architectures as described in current literature on the subject1 . The list will be classified by increasing numbers of degrees of freedom, from 3 to 6, for the end-effector. In the figures, actuated joints will be represented by arrowed vectors, while passive joints will be indicated, if necessary, by dashed vectors.

Gosselin and his team have intensively studied the realization of a wrist based on this principle (186; 200; 524; 526) in order to make a pointing system (agile eye✷ AE ). 12). 12. Gosselin spherical wrist and its prototype: three spherical chains are used with rotary actuators with axes converging to the center of the moving plate (from Gosselin (186)) and Leguay and Reboulet (356) have suggested redundant spherical robots in order to optimize the manipulator dexterity. 13). The platform then turns about a point that is common to the three axes; therefore the star layout of the axis of the Argos joint is essential, while for the Star robot it is only a choice in the design.

1. GENERALIZED PARALLEL MANIPULATORS: DEFINITION General parallel manipulators can be defined as follows: A generalized parallel manipulator is a closed-loop kinematic chain mechanism whose end-effector is linked to the base by several independent kinematic chains. 2. PARALLEL MANIPULATORS This definition of generalized parallel manipulators is very open: it includes for instance redundant mechanisms with more actuators than the number of controlled degrees of freedom of the end-effector, as well as manipulators working in cooperation .

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Parallel Robots by J. -P. Merlet (auth.)

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