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A method for controlling the symmetry of the acceleration and deceleration stages of the indexing mechanism of the laser strapdown inertial group

A technology of indexing mechanism and strapdown inertial group, which is applied in the control system, motor generator control, electrical components, etc., can solve the problem of affecting the alignment accuracy, the dispersion of the inertial group alignment result becoming larger, and the symmetry cannot be guaranteed, etc. problem, to ensure the effect of accuracy

Active Publication Date: 2019-02-01
XIAN AEROSPACE PRECISION ELECTROMECHANICAL INST
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Problems solved by technology

If the symmetry of the acceleration phase and deceleration phase of the indexing mechanism cannot be guaranteed, the dispersion of inertial group alignment results will become larger, thus affecting its alignment accuracy

Method used

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  • A method for controlling the symmetry of the acceleration and deceleration stages of the indexing mechanism of the laser strapdown inertial group
  • A method for controlling the symmetry of the acceleration and deceleration stages of the indexing mechanism of the laser strapdown inertial group
  • A method for controlling the symmetry of the acceleration and deceleration stages of the indexing mechanism of the laser strapdown inertial group

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Embodiment Construction

[0026] The invention provides a method for controlling the symmetry of the acceleration and deceleration stages of the indexing mechanism of the laser strapdown inertial group. Based on the input drive pulse signal of the stepping motor, the concept of the speed factor is introduced. The specific steps are:

[0027] Step 1) determine the maximum speed factor of the rotating mechanism;

[0028] The maximum speed factor (smooth speed factor) of the indexing mechanism is F m :V a ×Q×R / A≤F m ≤V b ×Q×R / A,F m Integer; V a and V b They are the lower limit and upper limit of steady speed respectively, unit: ° / s;

[0029] The step angle of the stepping motor is A°, the step-by-step count of the driver is Q, the reduction ratio of the worm gear is R; the steady speed of the indexing mechanism is V max ;V a ≤V max ≤V b ;The time T of the acceleration phase of the indexing mechanism R , acceleration time margin dT, speed factor switching period T 0 ;

[0030] Step 2) determin...

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Abstract

The invention belongs to the technical field of motor control and in particular relates to a method for controlling acceleration and deceleration phases of an indexing mechanism of a laser strapdown inertial measurement unit to be symmetrical. The method comprises the following steps: 1) determining a stable speed factor of a rotating mechanism; 2) determining a speed factor array of the acceleration phase; 3) controlling the acceleration phase, a stable phase and the deceleration phase of the rotating mechanism. By adopting the method provided by the invention, the high symmetry of the indexing mechanism of the laser strapdown inertial measurement unit at the acceleration phase and the deceleration phase can be guaranteed, so that the north finding precision of the laser strapdown inertial measurement unit is improved.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a method for controlling the symmetry of acceleration and deceleration stages of an indexing mechanism of a laser strapdown inertial group. Background technique [0002] During the north-seeking process of the laser strapdown inertial group, the stepper motor drives the worm to make the indexing mechanism rotate back and forth, so as to realize the anti-jamming north-seeking of the inertial group. The indexing mechanism will go through three stages when it rotates: the acceleration stage, the steady speed stage, and the deceleration stage. If the symmetry of the acceleration phase and deceleration phase of the indexing mechanism cannot be guaranteed, the dispersion of the inertial set alignment results will become larger, thereby affecting its alignment accuracy. Contents of the invention [0003] In order to solve the problems in the background technology, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P8/14
CPCH02P8/14
Inventor 蒲广平尚俊云卫育新师金花谢波师为建米乾宝
Owner XIAN AEROSPACE PRECISION ELECTROMECHANICAL INST
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