SUMMARY INTRODUCTION Smart system for aircraft passenger neck support.

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4.8 RECOMMENDATION FOR FUTURE WORK

The recommendation for future work of aircraft cabin simulator as follows: • Turbulence effect: The turbulence effect of the current aircraft cabin simulator is caused by human force. When the simulator is above the floor, the simulator operator will shake the simulator to create the turbulence effect. We recommend a rotary type electric motor to be installed in aircraft cabin simulator to create the turbulence effect automatically. The turbulence effect can be correlated with the visual effect from the beamer. • Floor space: The current aircraft cabin simulator occupies half of the floor space in Simulation Lab at Main Building of Eindhoven University of Technology. The floor space constraints in Simulation Lab caused some limitations during the early design stage of aircraft cabin simulator, such as the limited movement of the simulator, limited space in the aircraft cabin simulator, small control area and narrow projection area. Wider floor space is needed for future aircraft simulator design. • Sound proof and pressurized environment: The developed aircraft cabin simulator was built with wood and medium density fiberboard material. We recommend the simulator should be built with aluminum material, installed with sound absorption material and using soundproof rubber seals at the gaps between walls. We also recommend the simulator should be pressurized to create real flight environment. • Coordination between simulator motion and video: We recommend the simulator motion such as taxiing, take off and descending to be coordinated with video automatically. With the coordination between motion and video, the simulation effect can be improved.

4.9 SUMMARY

The aircraft cabin simulator was designed with the systematic total design approach. The total design method was useful for the development of the aircraft cabin simulator from concept to complete buildup. The market survey, design 127 knowledge and design experience were important inputs for the development of the aircraft cabin simulator. Product requirement provided the designer a way to keep track in ongoing project. The morphological chart helped the designer to identify the various design solutions and product functions in a systematic way. The weighted objective method was used in the brainstorming and mind mapping sessions to generate and determine the final concept. The final aircraft cabin consists of a control section, an inventory section, a projection section and an aircraft cabin simulator with motion platform. Two experiments were conducted to validate the aircraft cabin simulator. The aircraft cabin simulator was validated with twelve participants for a 10 hours simulated flight. The presence questionnaire was used to examine the perceived realism of the developed aircraft cabin simulator. The statistical result showed that the developed aircraft cabin simulator can sufficiently simulate an economy class aircraft cabin. 128 CHAPTER 5 EVALUATION OF A SMART NECK SUPPORT SYSTEM 130

5.1 INTRODUCTION

The previous chapter presented the development of the smart neck support system SnS 2 and the aircraft cabin simulator. In Chapter 3, the design of the developed SnS 2 was described. In Chapter 5 1 , two experiments, namely a calibration experiment and a validation experiment, were designed to evaluate the developed system. Electromyography EMG method was used to measure sternocleidomastoid SCM muscle stress. In order to objectify the EMG value of SCM muscle at a pre‐defined head rotation angle, the calibration experiment was carried out. The calibration experiment was conducted to find the relationship between defined head rotation angle, gender, duration and the SCM EMG value.

5.2 NECK MUSCLE AND ELECTROMYOGRAPHY MEASUREMENT