A unified synthesis method based on solution regions for four finitely separated and mixed “Point-Order” positions

Tong, Yanjun; Han, Jian; Yin, Lairong

doi:10.1016/j.mechmachtheory.2011.06.008

Cited by 24 publications

(8 citation statements)

References 5 publications

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“…θi corresponding mechanism of two dead DP1, DP2, and each had two old dead center branch, as shown in Fig. 1 (d) [5].θi corresponding mechanism of two dead DP1, DP2, among them at a dead point has two branches of the old union, at another dead center has two branches of the new generation, as shown in Fig. 1 (e).…”

Section: Foundation Of Circuit Identificationmentioning

confidence: 99%

Analysis of Circuit Identification for Single Ring Space Agencies

Zhou¹,

Lin²

2016

Proceedings of the 6th International Conference on Electronic, Mechanical, Information and Management Society

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Space agency of the circuit is more complicated than the planar mechanism. Different circuits have different rotational situation in planar multi-loop mechanism. For more than four or closed form space monocyclic institutions existed. In this article, monocyclic institutions is introduced; Foundation of loop identification is illustrated; Branch of automatic identification is analyzed; A new method of recognition space loop of monocyclic mechanism and its defects have been proposed, thus each dead point position is identified. This is an important theoretical value for the further study of space ring structure.

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Section: Foundation Of Circuit Identificationmentioning

confidence: 99%

Analysis of Circuit Identification for Single Ring Space Agencies

Zhou¹,

Lin²

2016

Proceedings of the 6th International Conference on Electronic, Mechanical, Information and Management Society

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“…where, ω 11 is the angular velocity of component 11. The rotational speed ratio of input component 1 and output component 11 can be associated by solving Equation ( 14) - (17).…”

Section: Distribution Of Transmission Ratiomentioning

confidence: 99%

“…For the attitude issues in the motion synthesis of mechanisms, Han et al [17] proposed a rigid body guidance method of bar mechanism based on solution domain synthesis, and the designed linkage mechanism could accurately achieve the given attitude conditions. Yang et al [18] applied a four-position solution domain synthesis method to the dimensional synthesis of the Watt-I six-bar mechanism.…”

Section: Introductionmentioning

confidence: 99%

Kinematic synthesis and simulation of a vegetable pot seedling transplanting mechanism with four exact task poses

Sun¹,

Xu²,

Zhou³

et al. 2023

International Journal of Agricultural and Biological Engineering

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To obtain a picking and planting integrated transplanting mechanism (PITM) with ideal trajectory shape, reasonable operating attitude, and compact structure for vegetable pot seedling transplanting, a symmetrical structural PITM composed of two planetary carriers and driven by a cam-noncircular gear combination mechanism was proposed in this paper. In accordance with the requirements of transplanting agronomy, the shape of the motion trajectory and the attitude of the end tip of the clamping claw at several specific positions (the starting and end points of picking seedling, the starting point of pushing seedling, and a special point on the return segment) were planned. To make the clamping claws of PITM pass through a set of prescribed positions, the mechanism was simplified to an open-chain 3R mechanism. An accurate four-position-based method for solving the open-chain mechanism model was adopted to obtain the curves of its fixed hinge point (central point) and dynamic hinge point (circle point). The ratio of adjacent bars' lengths was analyzed to determine the feasible interval of the central and circle point curves and the reasonable link length. A desired closed transplanting trajectory that goes through the given points and the corresponding transmission ratio model of the open-chain mechanism was established. After the transmission ratio of each stage of gear and cam pairs was calculated and distributed, the prototype of PITM was designed and manufactured. Lastly, the effectiveness and feasibility of the design were verified through a preliminary experiment of the prototype.

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“…where the variables x g1 and y g1 are the coordinate values of the hinge point G in Figure 3 at the initial position, and the coefficients of the above equations are determined by the elements in the DH matrix, see Refs. [20][21][22][23][24][25] for details.…”

Section: Modeling and Analysis Of Two-bar Mechanism With Five Key Pointsmentioning

confidence: 99%

Design of Vegetable Pot Seedling Pick-up Mechanism with Planetary Gear Train

Tong

Zhao

et al. 2020

Chin. J. Mech. Eng.

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It has been challenging to design seedling pick-up mechanism based on given key points and trajectories, because it involves dimensional synthesis and rod length optimization. In this paper, the dimensional synthesis of seedling pick-up mechanism with planetary gear train was studied based on the data of given key points and the trajectory of the endpoint of seedling pick-up mechanism. Given the positions and orientations requirements of the five key points, the study first conducted a dimensional synthesis of the linkage size and center of rotation. The next steps were to select a reasonable solution and optimize the data values based on the ideal seedling trajectory. The link motion was driven by the planetary gear train of the two-stage gear. Four pitch curves of noncircular gears were obtained by calculating and distributing the transmission ratio according to the data. For the pitch curve with two convex points, the tooth profile design method of incomplete noncircular gear was applied. The seedling pick-up mechanism was tested by a virtual prototype and a physical prototype designed with the obtained parameter values. The results were consistent with the theoretical design requirements, confirming that the mechanism meets the expected requirements for picking seedlings up. This paper presents a new design method of vegetable pot seedling pick-up mechanism for an automatic vegetable transplanter.

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A unified synthesis method based on solution regions for four finitely separated and mixed “Point-Order” positions

Cited by 24 publications

References 5 publications

Analysis of Circuit Identification for Single Ring Space Agencies

Analysis of Circuit Identification for Single Ring Space Agencies

Kinematic synthesis and simulation of a vegetable pot seedling transplanting mechanism with four exact task poses

Design of Vegetable Pot Seedling Pick-up Mechanism with Planetary Gear Train

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