| 摘要 |
PURPOSE:To obtain a thermal louver with high reliability for a space vehicle such as an artificial satellite by using shape memory alloy so that blades are fully open at set temperature and decrease in the degree of opening gradually below the temperature. CONSTITUTION:The shape memory alloy 6 is contracted so that the blades are fully open at some set temperature. They are fully closed in a low-temperature state, and the alloy 6 deforms gradually as a radiation surface 1 rises in temperature; and the blades are fully open at the set temperature and the heat radiation is carried on as it is above the temperature. Then, when the temperature drops below the set temperature, the alloy 6 becomes soft to draw a cord 7 against the force of a bias spring, closing the blades. |
