scholarly journals The Performance of a Mechanical Design ‘Compiler’

1993 ◽  
Vol 115 (3) ◽  
pp. 341-345 ◽  
Author(s):  
A. C. Ward ◽  
W. P. Seering
Keyword(s):  
Utility Function ◽  
Power Transmission ◽  
Mechanical Design ◽  
Temperature Sensing ◽  
Hydraulic Power ◽  
Optimal Implementation

A mechanical design “compiler” has been developed which, given an appropriate schematic, specifications, and utility function for a mechanical design, returns catalog numbers for an optimal implementation. The compiler has been successfully tested on a variety of mechanical and hydraulic power transmission designs, and a few temperature sensing designs. Times required have been at worst proportional to the logarithm of the number of possible combinations of catalog numbers.

Extending the constraint propagation of intervals

1990 ◽  
Vol 4 (1) ◽  
pp. 47-54 ◽  
Author(s):  
Allen C. Ward ◽  
Tomás Lozano-Pérez ◽  
Warren P. Seering
Keyword(s):  
Power Transmission ◽  
Mechanical Design ◽  
Constraint Propagation ◽  
Temperature Sensing ◽  
Quantitative Reasoning ◽  
Sensing Systems ◽  
Physical Objects ◽  
High Level

We show that the usual notion of constraint propagation is but one of a number of similar inferences useful in quantitative reasoning about physical objects. These inferences are expressed formally as rules for the propagation of ‘labeled intervals’ through equations. We prove the rules' correctness and illustrate their utility for reasoning about objects (such as motors or transmissions) which assume a continuum of different states. The inferences are the basis of a ‘mechanical design compiler’, which has correctly produced detailed designs from ‘high level’ descriptions for a variety of power transmission and temperature sensing systems.

scholarly journals Quantitative Inference in a Mechanical Design “Compiler”

1989 ◽  
Author(s):  
A. C. Ward ◽  
W. P. Seering
Keyword(s):  
Design Process ◽  
Power Transmission ◽  
Mechanical Design ◽  
Operating Conditions ◽  
Optimal Selection ◽  
High Level Language ◽  
Hydraulic Power ◽  
Detailed Design ◽  
High Level ◽  
Selection Of

Abstract This paper introduces the theory underlying a computer program that takes as input a schematic of a mechanical or hydraulic power transmission system, plus specifications and a utility function, and returns catalog numbers from predefined catalogs for the optimal selection of components implementing the design. Unlike programs for designing single components or systems, this program provides the designer with a high level “language“ in which to compose new designs. It then performs much of the detailed design process. The process of “compilation”, or transformation from a high to a low level description, is based on a formalization of quantitative inferences about hierarchically organized sets of artifacts and operating conditions. This allows design compilation without the exhaustive enumeration of alternatives. The paper introduces the formalism, illustrating its use with examples. It then outlines some differences from previous work, and summarizes early tests and conclusions.

scholarly journals Quantitative Inference in a Mechanical Design ‘Compiler’

1993 ◽  
Vol 115 (1) ◽  
pp. 29-35 ◽  
Author(s):  
A. C. Ward ◽  
W. P. Seering
Keyword(s):  
Design Process ◽  
Power Transmission ◽  
Mechanical Design ◽  
Operating Conditions ◽  
Optimal Selection ◽  
High Level Language ◽  
Hydraulic Power ◽  
Detailed Design ◽  
High Level ◽  
Selection Of

This paper presents the ideas underlying a computer program that takes as input a schematic of a mechanical or hydraulic power transmission system, plus specifications and a utility function, and returns catalog numbers from predefined catalogs for the optimal selection of components implementing the design. Unlike programs for designing single components or systems, this program provides the designer with a high level “language” in which to compose new designs. It then performs some of the detailed design process for him. The process of “compilation,” or transformation from a high to a low level description, is based on a formalization of quantitative inferences about hierarchically organized sets of artifacts and operating conditions. This allows design compilation without the exhaustive enumeration of alternatives. The paper introduces the formalism, illustrating its use with examples. It then outlines some differences from previous work, and summarizes early tests and conclusions.

New 3-DOFs Hybrid Mechanism for Ankle and Wrist of Humanoid Robot: Modeling, Simulation, and Experiments

2011 ◽  
Vol 133 (2) ◽  
Author(s):  
Samer Alfayad ◽  
Fethi B. Ouezdou ◽  
Faycal Namoun
Keyword(s):  
Degrees Of Freedom ◽  
Humanoid Robot ◽  
Power Transmission ◽  
Mechanical Design ◽  
Humanoid Robots ◽  
Classical Solutions ◽  
Kinematic Modeling ◽  
New Class ◽  
Hybrid Mechanism ◽  
And Control

This paper deals with the design of a new class of hybrid mechanism dedicated to humanoid robotics application. Since the designing and control of humanoid robots are still open questions, we propose the use of a new class of mechanisms in order to face several challenges that are mainly the compactness and the high power to mass ratio. Human ankle and wrist joints can be considered more compact with the highest power capacity and the lowest weight. The very important role played by these joints during locomotion or manipulation tasks makes their design and control essential to achieve a robust full size humanoid robot. The analysis of all existing humanoid robots shows that classical solutions (serial or parallel) leading to bulky and heavy structures are usually used. To face these drawbacks and get a slender humanoid robot, a novel three degrees of freedom hybrid mechanism achieved with serial and parallel substructures with a minimal number of moving parts is proposed. This hybrid mechanism that is able to achieve pitch, yaw, and roll movements can be actuated either hydraulically or electrically. For the parallel submechanism, the power transmission is achieved, thanks to cables, which allow the alignment of actuators along the shin or the forearm main axes. Hence, the proposed solution fulfills the requirements induced by both geometrical, power transmission, and biomechanics (range of motion) constraints. All stages including kinematic modeling, mechanical design, and experimentation using the HYDROïD humanoid robot’s ankle mechanism are given in order to demonstrate the novelty and the efficiency of the proposed solution.

scholarly journals Task based conceptual design of a testing machine

2019 ◽  
Vol 287 ◽  
pp. 01008
Author(s):  
Hrayr Darbinyan
Keyword(s):  
Conceptual Design ◽  
Power Transmission ◽  
Mechanical Design ◽  
Design Method ◽  
Testing Machine ◽  
General Concept ◽  
Test Machine ◽  
Concept Design ◽  
Original Design ◽  
Design Cycle

A novel approach of task based conceptual design(TBCD) has been successfully used as direct guider and efficient developer of unique mechanical structures for many cases of mechanical design. Nearly a decade long efforts of elaboration of efficient every day usage formats for this method have been ended in convenient design pages suitable and applicable for revealing, describing, visualizing and managing the data necessary for organizing the design process from task definition to solutions satisfying original design tasks. The aim of current study is to show steps of a solution generation within frames of a single design cycle and extend this action over consecutive design cycles. Those steps are described from standpoint of general concept design method starting from key model and finished with final aggregation matrice as ultimate step of a single design cycle. Unified mathematical expressions are used for introduction and description of all worked out and developed components of conceptual design. The paper is arranged in a way to show gradual steps of conceptual design(CD) of a power transmission system – a pipe wrench life test machine.

Pipe Joints for Hydraulic Power Transmission

1951 ◽  
Vol 164 (1) ◽  
pp. 308-323 ◽  
Author(s):  
B. Cooke
Keyword(s):  
Quantitative Data ◽  
Power Transmission ◽  
Hydraulic Power ◽  
Hydraulic Machinery ◽  
Pipe Joints

Hydraulic machinery suffers from the disadvantage of leakage of the fluid. Faulty pipe joints are one of the main offenders in this respect. In this paper the author describes some tests, carried out on a variety of pipe joints, to find a satisfactory one. In the absence of quantitative data, a joint and joint-ring were designed from the results of the tests. It is hoped that this paper will stimulate interest in this subject and so lead eventually to a wider knowledge and greater efficiency.

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