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This paper improves the permanent magnet (PM) machine position sensorless drive specifically for high speed operation. To obtain the rotor position, an approximation is typically assumed on the position estimator where the estimated position is almost equal to the actual position per sample instant. This small signal approximation might not be valid at high speed when the ratio of sampling frequency...
In some GPS-denied indoor environment, micro Unmanned Aerial Vehicle (UAV) is a good choice to execute special tasks. However, self-positioning of UAV becomes difficult without the help of GPS. In this paper, we develop the self-positioning method for UAV indoor navigation, which integrates the information of 3D laser scanner, ultra-wideband (UWB) and Inertial navigation system (INS). The positioning...
This paper proposes a time and jerk optimal trajectory planning method to find an efficient and sufficiently smooth trajectory. The objective function of the proposed method consists of two parts: the execution time and the smoothness of the trajectory in the joint space. The latter part enables one to get a smoother trajectory and reduce the tracking error. Moreover, the kinematic constraints of...
Particle swarm optimization (PSO) has attracted interest in recent years to solve practical economic dispatch problems. However, as with traditional optimization methods, conventional PSO may converge to local optima and incurs significant computational overheads to produce a practical solution, and has a performance which strongly depends on the choice of internal parameters. To address these drawbacks,...
Particle Impact Noise Detection is one of the most important methods in detecting remainders within space relays, and effective activation of the remainders is vital for the detection. In this paper, the electrostatic adherence and contact electrification of remainders were analyzed using the principles of electrostatics and kinetics. The strained condition of electrostatic adherent remainders was...
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