Kinematic Modeling of Origami-Based Forcep Designs

Inflatable structures have many potential applications in space collapsible structures, this paper based on the premise of the same exploring features on the Planetary Exploration Device (PED) designs a new type of inflatable and lightweight model of PED. The device structure is designed to be a wheel style, which can be folded together in the transport process and in non-working state. Comparing with traditional devices, the new Wheeled Planetary Exploration Device (CWPED) reduces the space of transporting the exploration equipments and decreases the transport costs, moreover, this device provides convenient conditions for the equipment package of the CWPED, and there are evident advantages in the aspects of handing, solar absorption, volume and quality. This article mainly introduces the preliminary design of the CWPED, and the structural characteristics of the device, the principle of motion control and the design of wheeled body skin material are analyzed.

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Mathematical Modeling, Design Validation, and Simulation of Morphing Mechanism for Winglet Applications

10.32920/ryerson.14657097.v1 ◽

2021 ◽

Author(s):

Upasana Choudhuri

Keyword(s):

Inverse Kinematics ◽

Parallel Mechanism ◽

System Response ◽

Preliminary Design ◽

Kinematic Modeling ◽

System Operation ◽

Design Validation ◽

Velocity Models ◽

Redundantly Actuated ◽

Inverse Velocity

Presented within this thesis is the preliminary design phases for the development of a morphing winglet mechanism. The mathematical models and analyses conducted within this thesis provide the means for bringing the design concept stage to the testing and validation phases. The kinematic modeling of a proposed design is developed. The inverse kinematics of the system are used to determine the required inputs to meet the range of motion. The velocity models for the system are established for both the forward and inverse cases. The inverse velocity models are used to establish a synchronous behaviour between the two serial linkages. Thus, allowing system operation as a redundantly actuated parallel mechanism. The results of implementation are evaluated for the initial and optimized designs. A proposed velocity profile is developed to facilitate control and desired operation of the system. This is then validated by the testing of the system response and error.

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Mathematical Modeling, Design Validation, and Simulation of Morphing Mechanism for Winglet Applications

10.32920/ryerson.14657097 ◽

2021 ◽

Author(s):

Upasana Choudhuri

Keyword(s):

Inverse Kinematics ◽

Parallel Mechanism ◽

System Response ◽

Preliminary Design ◽

Kinematic Modeling ◽

System Operation ◽

Design Validation ◽

Velocity Models ◽

Redundantly Actuated ◽

Inverse Velocity

Presented within this thesis is the preliminary design phases for the development of a morphing winglet mechanism. The mathematical models and analyses conducted within this thesis provide the means for bringing the design concept stage to the testing and validation phases. The kinematic modeling of a proposed design is developed. The inverse kinematics of the system are used to determine the required inputs to meet the range of motion. The velocity models for the system are established for both the forward and inverse cases. The inverse velocity models are used to establish a synchronous behaviour between the two serial linkages. Thus, allowing system operation as a redundantly actuated parallel mechanism. The results of implementation are evaluated for the initial and optimized designs. A proposed velocity profile is developed to facilitate control and desired operation of the system. This is then validated by the testing of the system response and error.

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Predicting sustainability assessment at early facilities design phase

Facilities ◽

10.1108/f-03-2016-0033 ◽

2017 ◽

Vol 35 (7/8) ◽

pp. 388-404 ◽

Cited By ~ 4

Author(s):

Valentina Zileska Pancovska ◽

Silvana Petrusheva ◽

Aleksandar Petrovski

Keyword(s):

Predictive Model ◽

Work Experience ◽

Sustainability Assessment ◽

Project Managers ◽

General Regression Neural Network ◽

Percentage Error ◽

Preliminary Design ◽

Design Phase ◽

Content Type ◽

Facilities Design

PurposeIntegrating the aspects of sustainability into facilities design has become a designers’ challenge, and the early design phase is seen as the most important in implementing sustainability into facilities design. Therefore, this paper aims to analyze the factors that influence sustainability assessment of preliminary design of facilities and predicts sustainability assessment depending on those factors. Design/methodology/approachData were collected by survey questionnaire distributed to project managers using a six-point Likert scale. Obtained data were modeled with general regression neural network (GRNN) using DTREG software. In total, 27 factors were chosen for determining the most accurate predictive model, and their importance was computed. FindingsThe six most important factors for sustainability assessment of facilities design are: work experience, work on several outline design proposals, resolving issues between stakeholders, prioritization of participants in the design phase, procurement management and defining projects’ program and goals. The predictive model that was used for prediction of the sustainability assessment was shown to be highly accurate, with MAPE (mean absolute percentage error) amounting to 2.58 per cent. Practical implicationsUsing the same approach, assessment of every other factor for the preliminary design can be predicted and the factors that are most influential to its sustainability can be obtained. Originality/valueThe paper supports the sustainability improvement of the preliminary design of future facilities’ projects, as well as support during the decision-making process.

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