Squib Initiation Sequencer for Launch Vehicle Payload Separation
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Solution Overview
Problem
The existing power systems in launch vehicles often struggle to simultaneously initiate all release mechanisms due to power limitations, which can cause excessive shock to payloads and delay in deployment.
Innovation Solution
A squib initiation sequencer that fires release mechanisms in a sequential pattern, reducing power requirements and unnecessary delays by monitoring current flow and immediately proceeding to the next squib in the sequence once the previous one has fired.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If all release mechanisms are fired simultaneously, then payload separation is achieved quickly, but power requirements exceed the capability of the launch vehicle's power system
Solution Approach 1:
The patent divides the simultaneous firing of all release mechanisms into sequential groups. The squib initiation sequencer fires squibs in multiple steps rather than all at once, segmenting the total power demand into smaller, manageable pulses that the power system can handle while still achieving rapid payload separation.
Solution Approach 2:
The patent implements periodic action by using a sequencer that fires squibs in repeated cycles. The logic module monitors current flow through each squib group and waits for current to fall below a threshold before initiating the next group, creating a periodic firing pattern that reduces peak power requirements while maintaining separation speed.
2Speed
If all release mechanisms are fired simultaneously, then payload separation is achieved quickly, but excessive shock is produced to the payload
Solution Approach 1:
The patent segments the firing of release mechanisms into sequential groups, so that squibs are activated in stages rather than all simultaneously. This segmentation reduces the cumulative shock to the payload by distributing the mechanical impulse over time, while still achieving rapid separation through continued firing of remaining squibs.
Solution Approach 2:
The patent applies preliminary action by firing initial groups of squibs before the payload is fully separated. The sequencer monitors current flow and waits for each group to complete firing before initiating the next group, ensuring that the payload experiences reduced shock from preliminary firings while still achieving complete separation through subsequent squib activation.
3Power
If sequential firing of squibs is implemented, then power requirements are reduced, but delay between successive squib firing increases
Solution Approach 1:
The patent uses feedback from current flow monitoring to minimize delay between squib groups. The logic module continuously monitors current through each squib group and immediately initiates the next group once current falls below a predetermined threshold, using real-time feedback to eliminate unnecessary waiting time while maintaining sequential firing for power reduction.
Solution Approach 2:
The patent ensures continuity of useful action by having the sequencer immediately proceed to fire the next squib group as soon as the current monitoring indicates the previous group has completed firing. This continuous operation minimizes idle time between sequential firings, maintaining rapid payload separation while preserving the power benefits of sequential activation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces power demands, minimizes payload tip-off rates, and enhances flight performance by allowing for faster and more controlled payload release.
Implementation Method 1
The squib may be initiated, or 'fired,' by applying an electric current to a bridgewire, bridge resistor, or other pyrotechnic initiator in the squib
Implementation Method 2
These pyrotechnic fasteners may contain an explosive charge activated by a 'squib' that when initiated, breaks the fastener mechanism into multiple pieces
Data Source
AI summary
Technologies for sequentially initiating squibs in one or more release mechanisms in order to reduce delay between successive squibs are provided. A squib initiation sequencer is configured to initiate squibs of one or more release mechanisms in a pre-programmed sequence. The squib initiation sequencer is further configured to detect when the initiation of each squib in the sequence is complete, and immediately move to the next sequential step without waiting the entire maximum initiation time per the squib manufacturer's specifications.