<title>Evaluation of performance indices for tuning the switch timing of pulse-switched piezoelectric shunts for vibration control</title>

Abstract Analytical and graphical performance synthesis tools for multi-DOF mechanisms are developed in the companion of this two-part paper [1]. Various performance indices derived from the Jacobian matrix for analyzing performance characteristics of multi-DOF mechanisms were proposed. These performance indices are the local kinematic coupling index (inner product of the Jacobian column vectors), the local directional mobility index (ratio of the Jacobian’s eigenvalues), and the local efficiency index (product of the Jacobian’s eigenvalues). In this paper, effort is placed on the applicability of the proposed analytical and graphical synthesis tools used to aid the design of multi-DOF mechanisms. Two examples representing open and closed chain mechanisms will be used to illustrate the effectiveness and efficiency of proposed method. First, a two-link planar robotic manipulator is used to apply the the proposed method. Following that, a two DOF parallel drive road simulator illustrates applicability of the suggested tools. Through these examples, geometric parameters and joint range limits of the mechanism are optimized through the evaluation of performance indices, eigen-ellipse and intersection angle between trajectory contours.

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Applications of Kinematic/Kinetic Performance Tools in Synthesis of Multi-DOF Mechanisms

Journal of Mechanical Design ◽

10.1115/1.2919400 ◽

1994 ◽

Vol 116 (2) ◽

pp. 452-461 ◽

Cited By ~ 3

Author(s):

Ming-Yih Lee ◽

A. G. Erdman ◽

Y. Gutman

Keyword(s):

Efficiency Index ◽

Inner Product ◽

Performance Indices ◽

Kinematic Coupling ◽

Evaluation Of Performance ◽

Coupling Index ◽

Closed Chain ◽

Effectiveness And Efficiency ◽

Index Ratio ◽

Joint Range

Analytical and graphical performance synthesis tools for multi-DOF mechanisms are developed in the companion of this two-part paper [1]. Various performance indices derived from the Jacobian matrix for analyzing performance characteristics of multi-DOF mechanisms were proposed. These performance indices are the local kinematic coupling index (inner product of the Jacobian column vectors), the local directional mobility index (ratio of the Jacobian’s eigenvalues), and the local efficiency index (product of the Jacobian’s eigenvalues). In this paper, effort is placed on the applicability of the proposed analytical and graphical synthesis tools used to aid the design of multi-DOF mechanisms. Two examples representing open and closed chain mechanisms will be used to illustrate the effectiveness and efficiency of the proposed method. First, a two-link planar robotic manipulator is used to apply the proposed method. Following that, a two DOF parallel drive road simulator illustrates applicability of the suggested tools. Through these examples, geometric parameters and joint range limits of the mechanism are optimized through the evaluation of performance indices, eigen-ellipse and intersection angle between trajectory contours.

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Using Performance Indices to Evaluate the Estimate at Completion

The Journal of Cost Analysis ◽

10.1080/08823871.1994.10462282 ◽

1994 ◽

Vol 11 (1) ◽

pp. 17-23 ◽

Cited By ~ 13

Author(s):

David S. Christensen

Keyword(s):

Performance Indices

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How to Evaluate Remote Tower Metrics in Connection With Weather Observations

Aviation Psychology and Applied Human Factors ◽

10.1027/2192-0923/a000142 ◽

2018 ◽

Vol 8 (2) ◽

pp. 100-111 ◽

Cited By ~ 1

Author(s):

Maik Friedrich ◽

Christoph Möhlenbrink

Keyword(s):

Traffic Control ◽

Air Traffic Control ◽

Influential Factors ◽

Air Traffic ◽

Weather Event ◽

Evaluation Of Performance ◽

Weather Events ◽

Weather Observations ◽

Validation Experiment ◽

Remote Controller

Abstract. Owing to the different approaches for remote tower operation, a standardized set of indicators is needed to evaluate the technical implementations at a task performance level. One of the most influential factors for air traffic control is weather. This article describes the influence of weather metrics on remote tower operations and how to validate them against each other. Weather metrics are essential to the evaluation of different remote controller working positions. Therefore, weather metrics were identified as part of a validation at the Erfurt-Weimar Airport. Air traffic control officers observed weather events at the tower control working position and the remote control working position. The eight participating air traffic control officers answered time-synchronized questionnaires at both workplaces. The questionnaires addressed operationally relevant weather events in the aerodrome. The validation experiment targeted the air traffic control officer’s ability to categorize and judge the same weather event at different workplaces. The results show the potential of standardized indicators for the evaluation of performance and the importance of weather metrics in relation to other evaluation metrics.

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