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NASA-LLIS-1617
Lessons Learned – Fin Actuator System (FAS)/High Current Transients in Digital Circuits
Year: 2005
Abstract: Abstract:
The Pegasus actuator system was redesigned to accommodate the need for greater hinge torque. The decision to re-utilize, as much as possible, of the existing legacy actuator drive system is not necessarily a poor choice. However, one must understand that significantly increasing the performance requirements will stress all components in the (sub)system. Instantaneous currents associated with digital switching of power components can far exceed the steady-state values. When considering undertaking a significant redesign of a system or sub-system, extreme care must be taken to ensure that reutilization of existing components, i.e. motherboards, power supplies, cabling, etc., doesn't pose a greater risk than the initial cost and schedule impact of a complete (sub)system redesign.
The Pegasus actuator system was redesigned to accommodate the need for greater hinge torque. The decision to re-utilize, as much as possible, of the existing legacy actuator drive system is not necessarily a poor choice. However, one must understand that significantly increasing the performance requirements will stress all components in the (sub)system. Instantaneous currents associated with digital switching of power components can far exceed the steady-state values. When considering undertaking a significant redesign of a system or sub-system, extreme care must be taken to ensure that reutilization of existing components, i.e. motherboards, power supplies, cabling, etc., doesn't pose a greater risk than the initial cost and schedule impact of a complete (sub)system redesign.
Subject: Accident Investigation
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:11:30Z | |
| date available | 2017-09-04T18:11:30Z | |
| date copyright | 06/02/2005 | |
| date issued | 2005 | |
| identifier other | GZXCQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/194485 | |
| description abstract | Abstract: The Pegasus actuator system was redesigned to accommodate the need for greater hinge torque. The decision to re-utilize, as much as possible, of the existing legacy actuator drive system is not necessarily a poor choice. However, one must understand that significantly increasing the performance requirements will stress all components in the (sub)system. Instantaneous currents associated with digital switching of power components can far exceed the steady-state values. When considering undertaking a significant redesign of a system or sub-system, extreme care must be taken to ensure that reutilization of existing components, i.e. motherboards, power supplies, cabling, etc., doesn't pose a greater risk than the initial cost and schedule impact of a complete (sub)system redesign. | |
| language | English | |
| title | NASA-LLIS-1617 | num |
| title | Lessons Learned – Fin Actuator System (FAS)/High Current Transients in Digital Circuits | en |
| type | standard | |
| page | 3 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;2005 | |
| contenttype | fulltext | |
| subject keywords | Accident Investigation | |
| subject keywords | Flight Equipment | |
| subject keywords | Hardware | |
| subject keywords | Safety & Mission Assurance | |
| subject keywords | Test & Verification |