Safe and arm system for a robot
First Claim
1. A safe and arm system comprising:
- an operator control subsystem including;
a first arm switch including a safe state and at least one armed state,a second arm switch including a safe state and an armed state, anda fire switch including a safe state and a firing state; and
a fire control subsystem responsive to the operator control subsystem and including;
at least a pair of terminals for connection to a munition, the terminals initially shorted together and without a ground,a power supply control circuit including a first microcontroller configured to supply power to the terminals,a ground supply circuit including a second microcontroller configured to ground one said terminal, anda terminal shorting circuit including a third microcontroller configured to remove the short across the pair of terminals,the power supply control circuit, ground supply circuit, and terminal shorting circuit configured to ground one terminal, remove the short across the pair of terminals, and to supply power to the terminals only if the first and second arm switches and the fire switch are all activated from the corresponding safe state in a predetermined sequence, each microcontroller configured to monitor at least one other microcontroller to ensure the microcontrollers agree said predetermined sequence has occurred within a predetermined time before said one terminal is grounded, the short across the pair of terminals is removed, and power is supplied to the terminals.
1 Assignment
0 Petitions
Accused Products
Abstract
A safe and arm system includes an operator control subsystem including a first arm switch, a second arm switch, and a fire switch. A fire control subsystem is responsive to the operator control subsystem and includes at least a pair of terminals for connection to a munition. The terminals are initially shorted together and without a ground. A power supply control circuit is configured to supply power to the terminals. A ground supply circuit is configured to ground one said terminal. A terminal shorting circuit is configured to remove the short across the pair of terminals. The power supply control circuit, the ground supply circuit, and the terminal shorting circuit are configured to ground one terminal, remove the short across the pair of terminals, and to supply power to the terminals only if the first and second arm switches and the fire switch are all activated in a predetermined sequence.
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Citations
14 Claims
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1. A safe and arm system comprising:
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an operator control subsystem including; a first arm switch including a safe state and at least one armed state, a second arm switch including a safe state and an armed state, and a fire switch including a safe state and a firing state; and a fire control subsystem responsive to the operator control subsystem and including; at least a pair of terminals for connection to a munition, the terminals initially shorted together and without a ground, a power supply control circuit including a first microcontroller configured to supply power to the terminals, a ground supply circuit including a second microcontroller configured to ground one said terminal, and a terminal shorting circuit including a third microcontroller configured to remove the short across the pair of terminals, the power supply control circuit, ground supply circuit, and terminal shorting circuit configured to ground one terminal, remove the short across the pair of terminals, and to supply power to the terminals only if the first and second arm switches and the fire switch are all activated from the corresponding safe state in a predetermined sequence, each microcontroller configured to monitor at least one other microcontroller to ensure the microcontrollers agree said predetermined sequence has occurred within a predetermined time before said one terminal is grounded, the short across the pair of terminals is removed, and power is supplied to the terminals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of safely and securely initiating munition connected to a pair of terminals, the method comprising:
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initially shorting the terminals together; initially removing any ground from the terminals; initially providing no power to the terminals; connecting the munition to a pair of terminals; using a third microcontroller to remove the short across the terminals, using a second microcontroller to supply a ground to one terminal, and using a first microcontroller to provide power to the terminals to initiate the munition only if three activations occur in a predetermined sequence; and for each microcontroller, monitoring at least one other microcontroller to ensure the microcontrollers agree said predetermined sequence has occurred within a predetermined time before said one terminal is grounded, the short across the pair of terminals is removed, and power is supplied to the terminals. - View Dependent Claims (14)
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Specification