Understanding Skill in EVA Mass Handling Volume III: Empirical Developments and Conclusions
نویسندگان
چکیده
1 1. Identification and Significance of the Research Issues 1 2. Theoretical and Empirical Foundations 3 2.1 Related Research by the Investigators 3 2.2 Selective Loss of Detail in the Analysis of Complex Systems 4 2.3 Common Constraints on Postural Control 6 2.4 Information in Movement Variability 7 2.5 Multicriterion Control of Posture 9 3. Experimental Methods 11 3.1 Subjects 11 3.2 Task 11 3.3 EMU 12 3.4 ORU 12 3.5 ORU Docking Structure 13 3.6 Enhancement of the Mass Handling Simulator 13 3.7 Portable Foot Restraint and Attachment Structure 15 4. Data Reduction 16 4.1 Anthropomorphically Valid Measurement Systems 16 4.2 Summary Statistics Used in Time-Scale Reduction 17 4.3 Variables in the Reduced Data Sets 19 4.3.1 ORU Control 21 4.3.2 Postural Configuration 22 4.3.3 Postural Stability 22 4.3.4 Equilibrium 23 4.3.5 Effortfulness of Postural Control 23 5. Experimental Results 23 5.1 Data Transformations 25 5.2 Interaction Between Upper-Body Perturbations With Respect to ORU Stability 25 5.3 Body Configuration With Respect to ORU Stability 27 5.4 Body Configuration With Respect to Upper-Body Yaw Stability 28 5.5 Body Configuration With Respect to Upper-Body a-p Stability 30 5.6 Body Configuration With Respect to Sagittal Stability of Interaction With the PFR 31 5.7 Body Configuration With Respect to Upper-Body Yaw Equilibrium and Effort 31 5.8 Transducers for Performance Evaluation 33
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