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The down-filling machine is the automatic, intelligent, mechanical and electric device with low-cost, great efficiency that can reduce labor intensity and improve labor conditions. It can fill down to duvet or down jacket from the container according to weight data exactly. This paper elaborated on several aspects: working principle of automatic down -filling machine, realization of control system,...
A crucial component of a grid-connected converter system is the phase-locked loop (PLL) that synchronizes the control to the grid voltage. Accurate, fast responding PLLs are required to provide phase angle and frequency measurements of the grid voltage for control and protection purposes. This paper proposes novel feedback mechanisms using the estimated frequency and phase in single-phase PLLs (in...
We report an experimental result on closed-loop subspace model identification of a cart-inverted pendulum system. Such a system as mentioned here is known as a typical unstable underactuated system, which is impossible of open-loop identification. Furthermore, any conventional SISO identification is not applicable to this system since this system is of single input and two outputs. Therefore, in this...
In this paper, a controller for the singularly perturbed system is designed in detail to satisfy frequency-domain loop-shaping specifications which are given in terms of Hinfin norm, moreover, the controller has the similar structure with the full system. It is further shown that this controller is obtained through designing its fast and slow parts. The main contribution of this paper is that the...
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