Stratospheric airship height control method and system

A stratospheric airship, altitude control technology, applied in instrumentation, geometric CAD, design optimization/simulation, etc., can solve problems such as difficult self-adaptation, difficult parameter selection, and large randomness

A stratospheric airship, altitude control technology, applied in instrumentation, geometric CAD, design optimization/simulation, etc., can solve problems such as difficult self-adaptation, difficult parameter selection, and large randomness

CN112231845AActive Publication Date: 2021-01-15NAT UNIV OF DEFENSE TECH

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  • Stratospheric airship height control method and system
  • Stratospheric airship height control method and system
  • Stratospheric airship height control method and system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]In this embodiment, aiming at the altitude control problem of the stratospheric airship, a Markov decision process model consisting of determining the state transition probability based on the airship speed distribution and the return value space based on the obstacle avoidance idea is proposed, and a highly intelligent control method using the Q-learning algorithm, Taking the speed distribution as the basis for the selection of action probability in the Q-learning learning process is one of the key elements of the algorithm. In order to realize the interaction between the external environment and the agent, the speed needs to be corrected by feedback, and the real-time height difference is used as the ascent speed distribution update. The basis to ensure the reasonable validity of the state transition probability. The reward value space based on the idea of ​​obstacle avoidance is the main basis for judging the optimal action sequence. Through the expected height change ...

Embodiment 2

[0079] This embodiment is used to provide a kind of stratospheric airship height control system, utilizes the airship height control method as described in embodiment 1 to work, and described control system comprises:

[0080] The Markov decision process model acquisition module is used to establish the Markov decision process model for airship height control; the Markov decision process model includes state space, action space, return value space, state transition probability and target optimization function;

[0081] The Markov decision process model acquisition module includes a return value space design submodule; the return value space design submodule includes:

[0082] a grid space acquiring unit, configured to acquire a pre-planned expected height change curve; and perform rasterization on the surrounding space of the expected height change curve to obtain a grid space;

[0083] A reward value calculation unit, configured to select an action in the action space for ea...

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Abstract

The invention relates to a stratospheric airship height control method and system, and belongs to the technical field of airship height control, and the method comprises the steps: building a Markov decision process model for airship height control, selecting a plurality of motions from a motion space according to a Q-learning algorithm and a state transition probability based on a current state;determining all actions selected from the initial state to the termination state of the airship, taking all the selected actions as action sequences corresponding to the termination state, finally selecting the action sequence with the maximum target value in all the action sequences as an optimal sequence by utilizing a target optimization function, and controlling the airship to move according to the optimal sequence. Furthermore, the relevant kinetic model parameters of the stratospheric airship do not need to be obtained any more, the real-time state of the stratospheric airship and the set reference state serve as control input of the control system, and a control loop is simplified.

Description

technical field [0001] The invention relates to the technical field of airship height control, in particular to a method and system for controlling the height of a stratospheric airship. Background technique [0002] The stratospheric airship is a typical low-speed near-space vehicle. In the air-stationing stage, the energy depends on the day and night closed-loop system composed of solar cells and batteries, and the power depends on the vector propulsion device. The purpose is to control the horizontal trajectory and altitude of the airship, so that Achieving monthly-level long-duration regional stays, it has great application potential in the fields of high-resolution observation of the earth, communication relay, reconnaissance and surveillance, and environmental monitoring, and is known as a "stratospheric satellite." [0003] Reliable altitude control is one of the key technologies for airships to stay in the stratosphere and stay in the air for a long time. , The stra...

Claims

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Application Information

Patent Timeline
15 Jan 2021
Publication
CN112231845A
IPC
G06F30/15; G06F30/20; G06N7/00; G06F111/08
CPC
G06F30/15; G06F30/20; G06F2111/08; G06N7/01; Y02T90/00
Inventors
杨希η₯₯; ζ¨ζ™“δΌŸ