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Optimal field weakening control method based on the safety of springing electric rudder system

A technology of field weakening control and system safety, applied in motor generator control, electronic commutation motor control, control system, etc., can solve problems affecting full elastic safety design, etc., and achieve the effect of improving dynamic response speed

Active Publication Date: 2018-12-21
SHANGHAI AEROSPACE CONTROL TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the particularity of the application occasion, when using the magnetic field weakening algorithm to run at full power, it will inevitably put forward higher requirements on the performance of the steering gear itself, which will affect the safety design of the whole bomb

Method used

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  • Optimal field weakening control method based on the safety of springing electric rudder system
  • Optimal field weakening control method based on the safety of springing electric rudder system
  • Optimal field weakening control method based on the safety of springing electric rudder system

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Experimental program
Comparison scheme
Effect test

Embodiment

[0018] Embodiment: The basic principle of this method is as follows: define the magnetic field weakening index J, and the optimal magnetic field weakening index is maxJ

[0019]

[0020] Let maxJ=f(i d ) = g(i d )·h(i d ), and i q 2 + i d 2 =I s 2 ;

[0021]

[0022]

[0023] Since g(i d )exist monotonically decreasing, h(i d )exist monotonically increasing, so f(i d )exist There is a local optimal solution. Umax is the voltage limit; I s is the current limit value; ω is the rotor speed; i d is the stator d-axis current component; i q is the q-axis current component, ψ f is the flux linkage of the permanent magnet of the rotor; T e is the electromagnetic torque; T L is the load moment; n p is an extreme logarithm.

[0024] Specific implementation steps: first detect the current speed ω and load torque T of the motor L , to obtain the output torque T at the current speed e , current limit value I s , d-axis inductance component L d and the ...

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Abstract

The invention discloses an optimal field weakening control method based on the safety of a spring electric rudder system. The method comprises detecting current motor speed and load torque, obtainingthe output torque at the current speed, Current limit, d-axis inductance component and q-axis inductance component, defining a weak magnetic index J, giving the optimal weak magnetic control index based on rotational speed, output torque and load torque, calculating the J value of d-axis current component under different values, selecting the maximum value maxJ of J value, and taking the d-axis current component and q-axis current component corresponding to the value as the control output under the current rotational speed. Aiming at the characteristics of tactical missile, such as no reuse, fast maneuver, complex working condition and short endurance time under the same working condition, the invention fully utilizes the weak magnetic rising speed capability of the missile electric actuator under the condition of surplus power, designs the optimal distribution strategy of the straight axis current and the numerical calculation scheme, thereby improving the weak magnetic performance ofthe missile electric actuator system.

Description

technical field [0001] The invention belongs to the technical field of electric steering gear servo control, in particular for improving the safety of a field weakening algorithm in electric steering gear control. Background technique [0002] At present, field weakening control is mostly used for speed control of electric drive devices such as electric vehicles. The performance requirements mainly focus on expanding the speed range of the motor to make it run at full speed. As the core servo mechanism of the missile, the electric steering gear will affect the safe flight state of the whole missile. For the electric steering gear, the final focus of the position servo system is to quickly track the position target. Therefore, under the premise of speed regulation, more attention should be paid to "rapid arrival of the position", so there is a requirement for the rapid increase of the speed It is not limited to the ability of the highest speed, that is, there is a certain de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00
CPCH02P21/0089
Inventor 苏伟杰
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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