... energy harvesting devices are promising due to their simple configuration and high conversion efficiency. This paper studies multifrequency structures for piezoelectric energy harvesting of ambient kinetic energy, inspired by fractal geometry. Identifying such structures that are simple and efficient...

..., are normally not straight lines. As a result, the tooth top geometry generally does not fit the mating member’s real root shape, providing an uneven tooth root-tip clearance; additionally, in some cases root-tip interference between the tooth tip and the root tooth surfaces of the mating gear members may...

... of the complete product geometry. This paper proposes a more explicit method of shape grammar creation, that is, aligned with well-known design methodologies in order to enable the creation of a shape grammar during the new product development process. The established methodology for function first design...

... are the k th and the ( k -1)th iteration system-level optimal objective values, respectively, and σ is a predetermined small positive number. Geometry of subsystem with more than one constraint In the case that X sys k is at position I or II, there is only one active...

..., with the follower executing a combined translating and oscillating motion. With the rigid tooth motion obtained, the conjugate condition between the flexspline and the circular spline is determined, from which the conjugate tooth profile can be derived. In this paper, the motion is governed by geometry...

... the topology and geometry of an entire structure and the location and configuration of joints, considering structural performance, manufacturability, and assembleability. As a relaxation of our previous work utilizing a beam-based ground structure, this paper presents a new formulation in a continuum design...

... transmission apparatus for a twin-screw extruder was patented ( 11 ), which includes a mechanism for adjusting gear phases. This is achieved for helicoidal gear designs by means of an axial displacement of the wheel that allows the meshing phase to be adjusted. For a gearbox with the geometry...

... for metamorphic mechanism, leading to unified elementary matrix operation for presentation of topological variation. Phase matrix and augmented adjacency matrix are developed to present the topological state and geometry of metamorphic mechanism in an evolutionary process. The metamorphic kinematic pair has...

...Lars Vedmar Hobbing is a common manufacturing method when producing helical, involute gears. In order to give the manufactured gear a controlled surface smoothness, a method to, very accurately, determine the achieved surface geometry is needed. In this report, the cutting surfaces of the tool...

.... The challenges to developing a virtual environment to enable manual virtual assembly are many. In virtual assembly, users are manipulating complex CAD geometry that contains convex and nonconvex surfaces. Collision detection and force calculations between complex CAD models provide feedback to the user during...

... the proposed tooth profile opens a new perspective in manufacturing spur gears with any arbitrary tooth profiles. Machining simulation of the proposed gear 20 04 2009 08 03 2010 29 04 2010 29 04 2010 bending design engineering gears geometry machinery production...

... behavior of the manipulator. A multiobjective genetic algorithm is then applied coupled with an enhanced morphological representation for defining and encoding the structural geometry variables. The solution framework is integrated with a nonlinear finite element code for large-displacement analyses...

...Qi Fan Face-hobbing is a continuous generating process employed in manufacturing spiral bevel and hypoid gears. Due to machining dynamics and tolerances of machine tools, the exact tooth surface geometry may not be obtained from the machining process using theoretical machine tool settings...

... & Development (863) Program of China through Grant No. 2008AA05Z203. 02 07 2008 06 04 2009 25 06 2009 compressors design engineering geometry milling rotors screw groove bottom single screw compressor surface profile grooves and tooth tips cylindrical milling geometrical...

.... geometry manipulator kinematics optimisation In this paper a numeric example of workspace calculation is also presented. In this case the direct position problem is solved by an iterative method for each given combination of actuated pairs. The calculation verified the absence of singular...

...-system, and those for displacing two points of a body form a two-system. The new definition of pitch is 5 p = d 2 tan ϕ 2 20 02 2007 28 05 2008 09 09 2008 fasteners geometry The unification of finite and infinitesimal kinematics has long been...

.... The effectiveness of the proposed geometric modeling and optimization procedures is verified by the demonstrated examples. Here, X is the design variable vector defining the detailed geometry of the synthesized compliant mechanism. f ( X ) is the problem-dependent objective describing...

... be obtained by means of geometry principles for spherical engagement and a pair of conjugated crown racks, which can engage with the driver noncircular bevel gear and driven one, respectively. A series of new conception such as tangent azimuth angle, concavity of conical surfaces, and module angle...

...H. J. Sommer, III Matrix methods for kinematic analysis of spatial linkages were extended to provide jerk of joint pair variables, individual points, and individual links. Simple expressions for axode geometry were also developed. The methods were tested on revolute-spherical-universal-revolute...

... of four-bar linkage synthesis, which target mainly R R dyads. In proposing robust computational means to synthesize P R and R P dyads, we adopt an invariant formulation , which, additionally, sheds light on the underlying geometry. We develop below all quadratic terms of Eq. 7 , those in the first line...