ESA Document - Emits - ESA

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Visual sights Controls Actuators
Figure 4-113: Instrumentation and equipment used for manual final approach
Motion
control system
units
HMM
Assessment Study
Report: CDF-20(A)
February 2004
page 378 of 422
• For the Visual Sights: The crew of the Soyuz uses two equipments. One is a periscope
(BCK-4) and the other is a television system video monitor.
The sight(periscope) is the primary optical instrument. It has a dual screen that allows the
astronaut to view the target image. The periscope has two positions: attitude sight( aimed
along the transport vehicle –Y-axis) and approach sight (aimed along the transport
vehicle –X-axis). A reduced-scale colour image of the target is projected onto the screen.
The video monitor is another mean for viewing the target. It receives its image signal
from the external TV camera mounted on the habitation module. The crew only uses this
system for qualitative assessment of the final approach process.
• Transport Vehicle Controls.
The astronauts have two controls. One translation hand controller and one rotation hand
controller. The controls are mounted on brackets in the descent module near the center
astronaut seat.
The translational hand controller has two degrees of freedom. Tilting the stick in either
direction will translate the vehicle’s centre of gravity in the directions ±Y and ±Z of the
spacecraft coordinate system. The controller has a toggle switch with a middle (neutral)
position to generate the signals required to translate the vehicle’s center of gravity in the
±X direction.
The rotational hand controller has three degreesrees of freedom. With it you can control
the vehicle’s rate of rotation to control attitude.
4.5.2.6.2 Mass and power budgets (redundancy included)
Mass (kg) Power (W)
Stick (Two) 1.6 15
Screen 2 50
Periscope 30 TBD
Video monitor TBD TBD
Table 4-55: Mass and power budgets