Perimeter Propulsion System for Cargo VTOL Aircraft
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Solution Overview
Problem
Current unmanned aircraft systems (UAS) for cargo transportation lack efficient propulsion systems that enable stable vertical takeoff and landing (VTOL) and directional flight, limiting their versatility and operational capabilities in congested or remote areas.
Innovation Solution
A cargo transportation system with a centrally located platform equipped with a perimeter propulsion system comprising multiple cross-flow fans, including variable thrust, variable pitch, and variable speed cross-flow fans, which provide vertical lift and directional thrust, controlled by a redundant flight control system for autonomous or remote operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional propulsion systems are used in UAS, then the aircraft can achieve basic flight, but it lacks stable vertical takeoff and landing (VTOL) capability and directional flight control
Solution Approach 1:
The propulsion system is divided into multiple independent propulsion units positioned at different locations around the cargo platform. Each unit can be independently controlled to provide vertical lift and directional thrust, enabling VTOL and directional flight capabilities without requiring a completely complex integrated system.
Solution Approach 2:
The propulsion units are designed to perform multiple functions: they can generate vertical lift for takeoff and landing, provide forward thrust for directional flight, and enable hovering. This multi-functionality reduces the need for separate specialized systems, thereby managing complexity while enhancing versatility.
2Measurement precision
If multiple propulsion units are added to enable VTOL and directional flight, then flight control precision is improved, but the device complexity increases
Solution Approach 1:
The propulsion units incorporate variable pitch and variable speed mechanisms that allow dynamic adjustment of thrust magnitude and direction. This dynamic control capability enables precise flight control by independently modulating each propulsion unit's output, achieving high precision without requiring an excessive number of components.
Solution Approach 2:
The system changes operational parameters (pitch angle, rotational speed) of the propulsion units to control thrust vectoring. By adjusting these parameters, the system achieves precise directional control and stable VTOL operations without adding complex mechanical structures, thereby managing device complexity.
3Manufacturing precision
If variable pitch and variable speed cross-flow fans are used, then thrust control precision is enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent replaces complex mechanical variable pitch mechanisms with a combination of fixed-pitch cross-flow fans and variable speed electric motors. This substitution simplifies manufacturing by eliminating intricate mechanical linkages while maintaining thrust control precision through electronic speed control of the motors.
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 stable VTOL and directional flight capabilities, enhancing the system's versatility and operational efficiency in various environments by providing precise control over thrust and direction, thereby improving cargo delivery and maneuverability.
Implementation Method 1
a plurality of cross-flow fans positioned about the perimeter of the platform to provide propulsion... outgoing air is operable to generate vertical lift
Data Source
AI summary
A cargo transportation system includes a cargo platform having an upper surface and a perimeter. A propulsion system is disposed about the perimeter of the cargo platform. The propulsion system includes a plurality of propulsion assemblies, each including a propulsion unit disposed within a housing defining an airflow channel having an air inlet for incoming air and an air outlet for outgoing air such that the outgoing air is operable to generate at least vertical lift. A power system disposed within the cargo platform provides energy to drive the propulsion system. A flight control system operably associated with the propulsion system and the power system controls flight operations of the cargo transportation system.