Determination of arsenic, lead, cadmium, chromium, nickel in mainstream smoke of cigarette by graphite furnace atomic absorption spectrometry

2012

AMR

Based on the flexibility of single couple of serial mechanism and the stability of multi couples of parallel mechanism, a new type of S[T] output base of hybrid mechanism presented, component of sphere joint run through the tiger joint, this component still the output one with the capability of rotate in three dimensional space. Add serial branch including three translation couple P or/and rotation couple R to the new type of S[T] output base, put these members on one cubic frame, twenty seven configurations obtained with 3-DOF(degree of freedom) allow of three dimensional rotation, twenty seven configurations belong to three conditions obtained with 4-DOF allow of three dimensional rotation and one dimensional translation, nine configurations belong to three conditions obtained with 5-DOF allow of three dimensional rotation and two dimensional translation, one configuration obtained with 6-DOF allow of three dimensional rotation and three dimensional translation, all those sixty four configurations have no more than six translation couple or rotation couple, and the sum of two kind of couple is equal to six. Developing new type of hybrid manipulator based on the hybrid cubic mechanism constructed with S[T] output base and P/R input base will be possible in theory and useful.

Section: Introductionmentioning

confidence: 99%

Cubic Hybrid Mechanism Based on S[T] Output Base and P/R Input Base

2012

AMR

“…Serial robots and parallel robots are the basic class of robots, serial robots has characteristics of a large working space, large accumulated error on the end of executor, low stiffness, small load carrying capacity, simple solution in forward kinematics and complex solution in inverse kinematics [1]. While parallel robot has characteristics of a small working space, small accumulated error on the end of executor, hign stiffness, large load carrying capacity, complex solution in forward kinematics and simple solution in inverse kinematics [2].…”

Section: Introductionmentioning

confidence: 99%

Topological Research on Hybrid Mechanism

2012

AMM

Methods to analysis the DOF(degree of freedom) and singularity of pure serial and pure parallel manipulator, which can not be used to the hybrid manipulator directly, three type of practical topological units and one type of virtual topological unit adopted, Synthesis method of topological dimensionality of the spatial mobility of each topological unit integrated together, architectures of serial-paralle mechanism discussed, also the formula and process of its topological dimensionality of spatial mobility presented, singularity analysis of hybrid mechanism can be carried out based on the forgoing results.

“…Both serial and parallel mechanism have their own advantages and disadvantages, which have complementary strength and weaknesses of the relationship between the structure and performance characteristics, also have a dual relationship. Pure parallel robot is not necessarily the best in the working space, the number of NC axes ratio, the combined effect of terms such as cost performance, but parallel robot and serial robot used in the same of more value [1]. Series-parallel robot is the one that rolled all the advantages of institutions and institutions of traditional machine tools.It is the series-parallel robot that is a promising type of NC machine tools [2].…”

Section: Introductionmentioning

confidence: 99%

New Machine for Complex Structure Decoration Materials

2012

AMM

A new type of machine for complex structure decoration materials based on hybrid cubic manipulator with six degree of freedom(DOF) suggested in view of traditional serial manipulator and parallel manipulator, three dimensional translation and rotation of output shaft obtained through lineal driving. Define the description of spacial moving capability of common couples and translation base and rotation base of mechanism, based on the fact of mechanism consists of components, a new description method by topological graph theory of components relationship suggested, new description of serial mechanism and parallel mechanism and hybrid mechanism obtained with this method, description elements include component pane and constrained component pane and component relationship line and constrained component relationship line and spacial relative moving capability between adjacent components. DOF(degree of freedom) of hybrid mechanism analysised with example based on the definition of dimensionity of branch spacial moving capability and mechanism spacial moving capability, necessary and sufficient condition of nonsingularity of mechanism presented. Method of analytic geometry used to find the regular cuboid of the reachable working space shape of mechanism, the volume of the reachable working space rest with the limit of translation of couplers, its influential factors obtained, limit length of guideway etc. are the primary influential factors.