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This paper presents a mathematical model to describe the parameter changes of the primary segmented permanent magnet linear synchronous motor (PS-PMLSM) when the mover is between segments. Then, the back-EMF observation method based on disturbance observer is proposed. The extreme of the observer and the observing errors are analyzed. Based on the addition of the observed EMF with each active segment,...
In order to make full use of the ability of the low impact docking mechanism to reduce the contact force in the docking process, the impedance control strategy is designed. And then a kind of parameter adjusting flow is proposed for the impedance controller based on the influence rules of the target impedance. To perform a low impact docking mission unaware of the initial position error and orientation...
The designs of long-stator permanent magnet (PM) linear motor are widely adopted modular segments to simplify system and reduce energy losses. This paper investigates cross-coupling inductances for multi-segments PM linear motor with concentrated windings. Considering large phase inductances, an improved experimental method based on sine-wave voltage source are proposed to analyze the cross-coupling...
Multi-stage reconnection electromagnetic launcher is not a simple addition of some single-stage launching systems, there is a stage coupling between each driving coils. In this paper, the mathematical models of single and multi-stage reconnection electromagnetic launchers are described in detail, and the interstage coupling at different velocities is discussed respectively. The inter-stage coupling...
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