... 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...

... . Geometries of the two subsystems Figure 8 shows that all the subsystem constraints are convex constraints; therefore, there is no difficulty for CLA-CO to solve this problem. The third example is a gear reducer design problem [ 31 32 ] shown in Fig. 9 , which is also a NASA’s MDO test...

..., 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...

.... A solution is found between n = − 12 and n = 1 (inclusive) for the crossed rectilinear quadrilateral geometry. Between n = 2 and n = 13 , no solution for any geometry is found, and finally, between n = 14 and n = 18 , the solution is valid...

... 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...

... constraint-based modeling to facilitate low clearance assembly of CAD models. The method relies on the use of B-Rep geometry for computations, thereby providing exact collision detection and identification of constraint entities. Geometric constraints are identified and applied at run-time, not during...

... (Logix Tooth Profile) ,” ASME J. Mech. Des. 0161-8458 , 112 ( 3 ), pp. 430 – 436 . 10.1115/1.2912626 Kapelevich , A. , 2000 , “ Geometry and Design of Involute Spur Gears With Asymmetric Teeth ,” Mech. Mach. Theory 0094-114X , 35 ( 1 ), pp. 117 – 130 . 10.1016/S0094-114X(99)00002-6...

... 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...

... groove bottom for a single screw compressor generated using several cylindrical milling cutters. The results contribute to improving the design of the meshing pairs in the single screw compressor. 02 07 2008 06 04 2009 25 06 2009 compressors design engineering geometry milling...

.... 09 06 2008 19 02 2009 15 04 2009 geometry manipulator kinematics optimisation Parallel manipulators with fewer than six degrees of freedom (DOFs) have been attracting the attention of the robotic community for the past two decades. This is mainly due to the fact...

... as a variable in Eq. 3 (or S i j in Eq. 4 ). Because a screw depends on five independent parameters, one needs to specify five lines, L 1 , L 2 , … , L 5 , to solve for the screw, which in turn gives the corresponding LLC. A LLC can also be described using Grassmann geometry...

.... The effectiveness of the proposed geometric modeling and optimization procedures is verified by the demonstrated examples. The geometry of a compliant mechanism synthesized by topology optimization sometimes has certain limitations such as consisting of only straight uniform connections, having jagged or fuzzy...

... 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. The foregoing conditions, while rather unlikely to occur...