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The paper gives a controller tuning method using a virtual reference feedback tuning (VRFT) approach in frequency domain. While the original VRFT uses a data‐driven performance index based on input/output data directly, the proposed one derives a frequency domain performance index based on the Fourier transformation of one‐shot experimental input‐output data. The frequency domain performance index...
Strictly keep delivery date is the life of the manufacturing enterprise indefinitely. Especially in the developing countries such as China, labor-intensive enterprise is still the mainstay industry. As a result, assembly line is widely used as a manufacturing process for reducing costs and production time. However, laborer is the main factor of production speed in such a labor-intensive enterprise...
In uncertain cases, the result and efficiency of current period (or production cycle) are influenced not only by the risks which exist in current period but also by the risks which exist in the previous ones. What is more, the risk itself is also affected greatly by the risks which exist in the earlier periods. This kind of problem is called a limited-cycle problem with multiple periods. Normally,...
The paper gives a Virtual Feedback Tuning (VRFT) for two degree of freedom controllers using closed-loop step response data in the frequency domain. While the original VRFT uses a data-driven performance index based on input/output data directly, the proposed one derives a frequency domain performance index based on the Fourier transformation of one-shot experimental input-output data. The frequency...
The paper gives a controller tuning method using a Virtual Feedback Tuning (VRFT) approach in the frequency domain. While the original VRFT uses a data-driven performance index based on input/output data directly, the proposed one derives a frequency domain performance index based on the Fourier transformation of one-shot experimental input-output data. The frequency domain performance index makes...
In this paper, we deal with an assembly line with limited-cycle multiple periods with two kinds of workers. Skills of workers are assumed to be different. We consider an optimization problem for finding an allocation of workers to the line that minimizes total expected cost satisfying the demand. Then we propose a theorem of the property of the optimal worker allocation and discuss the other properties...
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