Foldable Multirotor Ballistic Launch Stabilization
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Solution Overview
Problem
Current multirotor drone deployment methods are slow, require user intervention, and cannot be autonomously launched from moving vehicles or unstable platforms, posing risks and limitations in emergency response, defense, and space exploration applications.
Innovation Solution
A ballistically launched foldable multirotor drone, referred to as SQUID, which transitions from a folded configuration to a fully controllable state in mid-air using a nichrome burn wire release mechanism and passive unfolding, ensuring autonomous stabilization and aerodynamic stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multirotor drones are deployed manually by human operators, then the deployment process is simple and controllable, but the deployment speed is slow and cannot be performed from moving vehicles or unstable platforms
Solution Approach 1:
The multirotor drone is divided into separable components (rotor arms, central body, propellers) that can be independently packaged and deployed. The rotor arms are folded against the central body during launch, then automatically unfolded and positioned in flight, enabling rapid deployment from constrained spaces without requiring manual assembly
Solution Approach 2:
The drone is pre-configured in a compact folded state within the launch tube, with all necessary components (rotor arms, propellers, battery, flight controller) already in place. The foldable mechanism and release system are pre-set to automatically deploy the drone upon launch, eliminating the need for manual intervention during deployment
2Extent of automation
If multirotor drones require user intervention for deployment, then the deployment process is safe and controlled, but the response time is delayed and cannot be autonomous
Solution Approach 1:
The drone performs its own deployment operations through automatic mechanisms. The foldable rotor arms self-unfold upon launch using spring-loaded hinges, the propellers self-position using elastic bands, and the entire deployment sequence occurs without external control inputs. This self-service capability enables autonomous deployment while maintaining reliability through passive mechanical systems
Solution Approach 2:
Manual mechanical operations (hand-unfolding arms, hand-securing propellers) are replaced with automatic mechanical systems (spring-loaded hinges, elastic band tensioners, release mechanisms). These automated mechanical systems provide reliable, repeatable deployment actions that eliminate human reaction time delays while maintaining safety through passive mechanical constraints
3Adaptability or versatility
If multirotor drones are launched from moving vehicles or unstable platforms, then the deployment flexibility and response capability are improved, but the aerodynamic stability during launch is compromised
Solution Approach 1:
The drone transitions from a static folded configuration to a dynamic unfolded configuration during flight. The foldable rotor arms and adjustable propeller positions allow the drone to adapt its aerodynamic characteristics in response to launch conditions. This dynamic reconfiguration enables stable flight after launch from moving vehicles or unstable platforms by optimizing the aerodynamic profile post-deployment
4Volume of moving object
If foldable designs are used to reduce deployment space, then the drone can be stored in compact form and launched from small tubes, but the unfolding process requires user intervention and increases risk
Solution Approach 1:
The complexity of the unfolding process is extracted and isolated into dedicated passive mechanical mechanisms (spring-loaded hinges, elastic band tensioners) that automatically perform the unfolding and positioning functions. These extracted mechanisms operate independently without requiring user intervention, transforming the unfolding process from a manual operation into an automatic mechanical sequence that reduces risk and complexity
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
Enables rapid, safe, and autonomous deployment of multirotor drones from moving vehicles and unstable platforms, enhancing situational awareness in emergency and space exploration scenarios while maintaining stability and control.
Implementation Method 1
a nichrome burn wire release mechanism
Implementation Method 2
aerodynamic stability
Data Source
AI summary
A ballistically launched foldable multirotor vehicle has a central body frame. A battery is located in an upper vertical location of the vehicle and positions a center of mass of the vehicle to provide aerodynamic stability during a launch. Fins are attached to the central body frame such that aerodynamic forces on the fins shift an aerodynamic center (AC) of the vehicle downward below the center of mass of the vehicle. Three or more foldable arms are attached to the central body frame via a hinge and exist in two states—a closed state where the foldable arms are parallel to a central body axis, and an open state (after launch) where the foldable arms extend radially outward perpendicular to the central body axis. Rotors mounted to each foldable arm are controlled by a motor to enable flight.