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A hold-down and release apparatus for a flight termination system having a terminal portion for holding-down and releasing a structural object which has an arrangement for attaching to the flight termination system. The hold-down and release apparatus includes several movable clamping segments provi

A hold-down and release apparatus for a flight termination system having a terminal portion for holding-down and releasing a structural object which has an arrangement for attaching to the flight termination system. The hold-down and release apparatus includes several movable clamping segments provided on the terminal portion of the flight termination system that are engageable in a complimentary fashion with the attachment arrangement on the structural object for releasably attaching the structural object to the flight termination system. The hold-down and release apparatus also includes springs for biasing the movable clamping segments means in a disengaging direction that causes the clamping segments to disengage from the attachment arrangement on the structural object to release the structural object from the flight termination system. The hold-down and release apparatus further includes a release band attached to the movable clamping segments for preventing the disengaging movement of the movable clamping segments such that they remain engaged to the attachment arrangement of the structural object for releasably attaching the structural object to the flight termination system. The release band is held in position by two non-explosive actuators (NEAs), such that either one or both actuators may initiate the release and loosen the release band which allows the movable clamping segments to move under the urge of the biasing, springs to disengage the complimentary attachment arrangement from the attachment arrangement of the structural object, to release the structural object from the flight termination system.

대표청구항 ▼

A hold-down and release apparatus for a flight termination system having a terminal portion for holding-down and releasing a structural object which has an arrangement for attaching to the flight termination system. The hold-down and release apparatus includes several movable clamping segments provi

A hold-down and release apparatus for a flight termination system having a terminal portion for holding-down and releasing a structural object which has an arrangement for attaching to the flight termination system. The hold-down and release apparatus includes several movable clamping segments provided on the terminal portion of the flight termination system that are engageable in a complimentary fashion with the attachment arrangement on the structural object for releasably attaching the structural object to the flight termination system. The hold-down and release apparatus also includes springs for biasing the movable clamping segments means in a disengaging direction that causes the clamping segments to disengage from the attachment arrangement on the structural object to release the structural object from the flight termination system. The hold-down and release apparatus further includes a release band attached to the movable clamping segments for preventing the disengaging movement of the movable clamping segments such that they remain engaged to the attachment arrangement of the structural object for releasably attaching the structural object to the flight termination system. The release band is held in position by two non-explosive actuators (NEAs), such that either one or both actuators may initiate the release and loosen the release band which allows the movable clamping segments to move under the urge of the biasing, springs to disengage the complimentary attachment arrangement from the attachment arrangement of the structural object, to release the structural object from the flight termination system. ides conditioned air from the system to the conditioned space and a return port that guides air from the conditioned space back to the system, the method comprising: providing a first control algorithm and second control algorithm for controlling the system, the first control algorithm being a function of the air temperature at the discharge port, and the second control algorithm being a function of the air temperature at the return port; operating the system using the first control algorithm when a first condition is met, and operating the system using the second control algorithm when a second condition is met; and automatically switching between the first control algorithm and the second control algorithm depending on the status of the first condition and the second condition. 2. The method of claim 1 further comprising measuring a temperature of ambient air outside of the conditioned space, wherein the first and second conditions are a function of the ambient air temperature. 3. The method of claim 2 wherein the first condition comprises the ambient temperature being greater than or equal to the set point. 4. The method of claim 2 wherein the second condition comprises the ambient temperature being less than the set point. 5. The method of claim 1 wherein operating the system using the first control algorithm when a first condition is met, and operating the system using the second control algorithm when a second condition is met includes: measuring a temperature of ambient air outside of the conditioned space; comparing the ambient air temperature to the set point; controlling the system utilizing the first control algorithm if the ambient air temperature is greater than or equal to the set point; and controlling the system utilizing the second control algorithm if the ambient air temperature is less than the set point. 6. The method of claim 1 wherein the system can operate in a high speed heat mode or a low speed heat modulation mode, and wherein operating the system using the second control algorithm when the second condition is met includes: operating the system in the high speed heat mode if the return air temperature is more than about 5 degrees below the set point; and operating the system in the low speed heat modulation mode if the return air temperature is less than about 1.5 degrees above the set point. 7. The method of claim 1 wherein the system can operate in a high speed heat mode, a low speed heat modulation mode, and a timed mode, and wherein operating the system using the second control algorithm when the second condition is met includes: operating the system in the low speed heat mode if the return air temperature is less than about 1.5 degrees above the set point; operating the system in the timed mode a predetermined period of time if the return air temperature is more than about 3 degrees below the set point temperature; and operating the system in the high speed heat mode if the return air temperature is more than about 3 degrees below the set point temperature for the predetermined period of time. 8. The method of claim 1 wherein the system can operate in a low speed cool modulation mode and a low speed cool mode, and wherein operating the system using the first control algorithm when the first condition is met includes: operating the system in low speed cool mode if the return air temperature is less than about 0.5 degrees below the set point; and operating the system in low speed cool modulation mode if the return air temperature is less than about 3 degrees above than the set point. 9. The method of claim 1 wherein the system can operate in a low speed cool modulation mode, a high speed cool mode, and a timed mode, and wherein operating the system using the first control algorithm when the first condition is met includes: operating the system in the low speed cool modulation mode if the discharge air temperature is less than about 5.0 degrees above the set poin