On the Synthesis of Spatial RRSS Motion Generators with Prescribed Coupler Loads

Abstract

This work extends the concepts and methodologies of Shen et al (1) and Al-Smadi et al (2) to synthesis of spatial RRSS motion generators with applied coupler loads. A general four-bar mechanism constraint that includes a coupler static load and a driver static torques is formulated using the principal of virtual work. This constraint is combined with the conventional RRSS motion generation model by Suh and Radcliffe (13) to form a nonlinear optimization problem from which RRSS mechanism solutions are calculated that approximate prescribed coupler poses and satisfy prescribed driver static torques for given coupler loads.

A Concept Cam Mechanism to Replicate RRSS Coupler Motion

“…Russell et al presented an RRSS motion generation model that includes prescribed coupler forces (8) .…”

Revolute-Cylindrical-Cylindrical-Cylindrical linkage optimum dimensional synthesis with static structural loading

“…Such optimization models have already been introduced for the 4 Revolute Spherical (or 4R Spherical) linkage, the Revolute-Revolute-Spherical-Spherical (or RRSS) linkage and the Revolute-Revolute-Spherical-Cylindrical (or RRSC) linkage. 14–17 No such optimization model has been presented for the RCCC linkage until now.…”

On the analysis of double wishbone suspension regarding steering input and anti-dive/lift effect

“…From a kinematics point of view, a suspension system can be defined as a combination of links and joints (Russell, et al, 2009), (Tanık and Parlaktaş, 2011), (Tanık and Parlaktaş, 2015c) A double wishbone mechanism is essentially a RSSR-SSP (R:revolute, S:spherical, P:prismatic) linkage (Shen, et al, 2014) when steering function is required as shown in Fig. 1.…”