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Angle compensation process for dual-motor redundancy control system

A technology of redundant control and angle compensation, applied in the direction of speed regulation of multiple motors, control using feedback, etc.

Inactive Publication Date: 2008-09-03
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

Based on the existing literature, the research on the multi-machine coaxial redundancy system is still in its infancy at home and abroad, and its research results are mainly reflected in the analysis of the mathematical model of the redundancy system and the research on the steady-state characteristics. It is a current research hotspot to effectively improve the operating efficiency of the shaft redundancy motor system while operating stably. Most of the existing solutions focus on the design of the motor, but there are few solutions from the perspective of control technology.

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  • Angle compensation process for dual-motor redundancy control system
  • Angle compensation process for dual-motor redundancy control system
  • Angle compensation process for dual-motor redundancy control system

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Embodiment Construction

[0015] 5.1 Analysis of the asymmetry phenomenon of dual-motor redundant control system

[0016] Taking the case of one pole of the rotor as an example, under the condition that the structure of the stator and the rotor is completely symmetrical, θ 1 = θ 2 (θ 1 and θ 2 are the angles between the direct axis (d-axis) of the rotor coordinate system of motors I and II in the dual-redundancy motor system and the axis of the A-phase winding). However, due to the influence of coupling installation errors and other factors, the rotor magnets of the coaxial redundant motor system are not necessarily completely symmetrical in the axial direction, and there may be a certain angle difference γ (γ = θ 1 -θ 2 ),Such as figure 1 , figure 2 As shown (A in the figure 1 -X 1 , B 1 -Y 1 、C 1 -Z 1 with A 2 -X 2 , B 2 -Y 2 、C 2 -Z 2 are the three-phase windings of the two motors in the dual redundant motor system; N 1 -S 1 , N 2 -S 2 are respectively the rotor magnets of the...

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Abstract

The invention relates to an angle compensation method for a double motor redundancy control system, which is a control scheme in redundancy transmission filed. Directed at the alnico asymmetry phenomena possibly existing in a coaxial redundancy motor system, the invention effectively improves the running efficiency of the redundancy motor system with an angle compensation strategy. A front rotating angle gamma0 and a back rotating angle gamma1 of the redundancy motor system are measured, and the equation gamma = gamma1 - gamma0 is satisfied, then gamma is recorded as the initial position angle of the redundancy motor system, ensuring the current decoupling relationship in the torch control of the double redundancy motor system is established, thus the running efficiency of the redundancy motor system is effectively improved. The method has simple digital realization, good universality is good, and practical value to the redundancy transmission system.

Description

1. Technical field [0001] The invention relates to a control method in the fields of AC frequency conversion and redundant transmission 2. Background technology [0002] All-electric / multi-electric aircraft is the development trend of the next generation of military and civilian aircraft. Its important feature is that the electric actuation system replaces the traditional hydraulic actuation system, which brings about a significant increase in overall aircraft performance and aircraft survival rate. At the same time, since the electric actuation system is closely related to the control performance of the aircraft, it is required that it should have fault-tolerant operation capability. Redundancy technology is one of the effective methods to obtain high reliability, and its application advantages in important occasions such as electric vehicles, full electric propulsion of ships, and aerospace are gradually emerging. [0003] At present, the research of motor redundancy tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D3/12H02P5/46
Inventor 方斯琛周波骆薇薇
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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