Synthesis of Six-bars | Mark Plecnik | Kinematics & Robotics

T1 - Circuit rectification for four precision position synthesis of stephenson six-bar linkages

Kinematic synthesis of Stephenson III six-bar ..

Topological synthesiscomprises of enumerating basic kinematic chains that satisfy topologicalrequirements and enumerating mechanisms derivable from each basickinematic chain.

An overconstrained four-bar curve cognate mechanism shown in a ..

4.1 IntroductionThe use of the modified standard codes for the development ofan integrated enumeration and automatic sketching scheme for mechanismsynthesis has been discussed in chapter 3.

Nanoparticles, in particular metallic nanoparticles have attracted considerable interest in many and diverse fields such as electronics, photonics, medicine, and agriculture. This review has summarized recent research into the synthesis of metallic nanoparticles using biological entities. However, owing to the diversity of biological entities ranging from microorganisms to plants, much of this field remains largely unknown and still remains to be discovered. The production of nanoparticles using biological entities has the potential to deliver new sources of novel materials that are stable, nontoxic, cost effective, environment-friendly, and synthesized using green chemistry approach. This green chemistry approach of using biological entities is in complete contrast with conventional chemical and physical processes that often use toxic materials that have the potential to cause environmental toxicity, cytotoxicity, and carcinogenicity. Whilst biological entities have been extensively used to produce nanoparticles, the use of plants offers a straightforward, clean, non-toxic, and robust procedure that does not need any special culture preparation or isolation techniques that are normally required for bacteria and fungi based techniques. In particular, the use of plant extracts for synthesizing nanoparticles is inexpensive, easily scaled up, and environment-friendly. Plant extracts have the potential to produce nanoparticles with a specific size, shape and composition. Plant synthesized nanoparticles have the potential to be widely used in current medical procedures involving nanoparticles such as fluorescent labelling in immunoassays, targeted delivery of therapeutic drugs, tumour destruction via heating (hyperthermia), and as antibacterial agents in bandages. On another front, plant synthesized nanoparticles have the potential to be used for the delivery of anti-microbiological compounds for use as pesticides for agricultural crops. Moreover, agricultural crop wastes and food industry wastes are also excellent candidates for supplying sources of plant-based bio-chemicals with the potential to synthesize metallic nanoparticles and similar products. Despite the environmental advantages of using green chemistry based biological synthesis over traditional methods as discussed in this article there are some unresolved issues such as particle size and shape consistency, reproducibility of the synthesis process, and understanding of the mechanisms involved in producing metallic nanoparticles via biological entities. In the case of plant extracts, nanoparticle formation mechanisms vary between different plant species. Therefore, there is a need for more studies to evaluate and understand the actual plant dependent mechanisms. This is a grossly unexplored field and requires much more research investment to fully utilize the green synthesis of metallic nanoparticles via biological entities.


Six-bar linkage synthesis | Mechanical Design 101

The kinematic synthesis problem becomes harder to solve for when the number of design parameters is increased especially for the over-constrained mechanisms.Spherical mechanisms hold a transition position between the planar and spatial linkages, hence there is still an ongoing interest in solving for the kinematic synthesis of these mechanisms.

Six-bar motion I. The Watt mechanism | SpringerLink

The kinematic synthesis problem becomes harder to solve for when the number of design parameters is increased especially for the over-constrained mechanisms.Spherical mechanisms hold a transition position between the planar and spatial linkages, hence there is still an ongoing interest in solving for the kinematic synthesis of these mechanisms.

2012, “Unified Synthesis of a Planar Four-Bar Mechanism for ..

According to the Stephenson-Ⅱ six-bar linkage with 4-position motion generation, the concept and equation of generalized Burmester curves based on Burmester curve was proposed. The solution region method was given. Firstly, this method required to get solution curves meeting requirements. Then the six-bar linkage with defects was removed from the solution region using the sign of Jacobin determinant value and mechanism motion continuity. Finally, considering the practical engineering requirements, the feasible solution region was obtained. Analysis example demonstrates that the method is practicable and effective. The proposed method is simple and convenient to be realized in programming. Besides that, the method can provide reference for other multi-bar linkages 4-position motion generation.

of Six-Bar Linkages for Mechanical Computation.

Type Synthesis of a single or double dwell six-link mechanismis typically conducted by choosing a four-link mechanism whichhas a coupler curve with a circular portion during a part of thecrank rotation.

Kinematics - Synthesis of Mechanisms: Methods and Techniques

The usefulness of using standardcodes for uniquely identifying mechanisms, and its subsequentadvantage in mechanism type synthesis has been previously established(Shin and Krishnamurty, 1994).