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A Control Method of Projectile Roll Angle Based on Reaction Flywheel

A technology of a reaction flywheel and a control method, applied in the field of navigation, can solve the problems of excessive weight of the projectile body and difficult control, and achieve the effect of a simple and feasible control method.

Active Publication Date: 2022-04-08
CHINA THREE GORGES UNIV
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  • Description
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AI Technical Summary

Problems solved by technology

Excessive weight of the projectile will also bring certain difficulties to control

Method used

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  • A Control Method of Projectile Roll Angle Based on Reaction Flywheel
  • A Control Method of Projectile Roll Angle Based on Reaction Flywheel
  • A Control Method of Projectile Roll Angle Based on Reaction Flywheel

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Embodiment Construction

[0050] A method for controlling the roll angle of a projectile based on a reaction flywheel, comprising the following steps:

[0051] Step 1: Select a general-purpose servo motor as the driving motor of the reaction flywheel, and establish a dynamic model with the roll angle as the controlled variable and the reaction flywheel speed, that is, the servo motor speed as the control variable, as follows:

[0052]

[0053] In the formula:

[0054] J b —moment of inertia of the rolling body;

[0055] θ—roll angle;

[0056] J w — the moment of inertia of the reaction flywheel;

[0057] Ω——reaction flywheel angular velocity;

[0058] m d - disturbance torque;

[0059] Assume The system expression can be obtained:

[0060]

[0061] make x 1 =y, x 3 = f, the expression of the extended state space of the system can be obtained as follows:

[0062]

[0063]

[0064] Step 2: Based on the dynamic model of the system established in step 1, establish an extended sta...

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Abstract

The invention provides a method for controlling the roll angle of a projectile based on a reaction flywheel, comprising the following steps: Step 1: establishing a dynamic model with the roll angle as the controlled quantity and the speed of the reaction flywheel as the control quantity; Step 2: based on the step 1 The established dynamic model of the system is used to establish an extended state observer to observe the roll angle, roll angular velocity, and disturbance torque; step 3: design the PD controller based on the roll angle, roll angular velocity, and disturbance torque observed in step 2, And compensate the disturbance torque; Step 4: Prove the stability of the extended state observer established in Step 2 and the controller established in Step 3. This method analyzes the dynamic model of the rolling channel of the projectile, and then designs the corresponding expansion state observer to observe the total disturbance during the flight of the projectile, and then realizes the compensation for the disturbance. Through the design of the controller, the Stable control of projectile roll channel.

Description

technical field [0001] The invention relates to the technical field of navigation, in particular to a method for controlling the roll angle of a missile body based on a reaction flywheel. Background technique [0002] During the precise control of the flight of the projectile, the stability of the projectile roll channel and the ability to quickly adjust the roll angle are the keys to achieve precise alignment and stable flight control of the projectile. During the flight, the projectile will be subject to various disturbances, such as the disturbance torque generated by aerodynamic friction, the disturbance between motor bearings, and so on. The existence of these disturbing moments will reduce the precision of projectile roll angle control. The excessive weight of the projectile will also bring certain difficulties to control. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for controlling the roll a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42B15/01
CPCF42B15/01
Inventor 吴正平邓聪颜华岑帅红
Owner CHINA THREE GORGES UNIV
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