Aircraft Position Control for Landing on Moving Decks
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Solution Overview
Problem
Rotorcrafts face difficulty in repeatedly landing and taking off at desired times due to the motion of the deck, especially when the deck is moving, leading to operational limitations.
Innovation Solution
An aircraft position control system that estimates the motion quantity of a target landing point using attitude correction acceleration and relative position, generating target relative position and velocity to enable the aircraft to follow the moving landing point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rotorcraft hovers at a predetermined position and waits for motion to decrease, then landing safety is improved, but operational flexibility and productivity deteriorate
Solution Approach 1:
The control system dynamically adapts to deck motion by continuously estimating motion quantity and adjusting target position and velocity in real-time, enabling the rotorcraft to follow the moving deck rather than waiting for motion to decrease
Solution Approach 2:
The system uses feedback from acceleration sensors and position data to estimate deck motion quantity, then adjusts control targets based on this feedback to maintain accurate positioning despite deck movement
2Stability of the object's composition
If the rotorcraft lands only when motion decreases, then landing stability is improved, but time loss increases
Solution Approach 1:
The system performs preliminary motion estimation and target adjustment before landing, allowing the rotorcraft to proactively compensate for upcoming deck motion rather than reactively waiting for motion to subside
Solution Approach 2:
The control system changes parameters (target position, target velocity) based on estimated motion quantity, enabling stable landing by adapting to motion conditions rather than requiring calm conditions
Data Source
AI summary
An aircraft position control system to make a position of an aircraft follow movement of a target landing point due to motion includes a motion quantity estimation processing unit that estimates a motion quantity of the target landing point, based on attitude correction acceleration for correcting attitude of the aircraft and a relative position between the aircraft and the target landing point, and a target information generation unit that outputs a target relative position between the aircraft and the target landing point to be achieved and target relative velocity between the aircraft and the target landing point to be achieved, based on the estimated motion quantity.