By Voronov A.A.

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After the predictive Smith FZ-PID correction, the rapidity and the accuracy of the system can meet the design requirements. Therefore, usage of the predictive Smith FZ-PID algorithm control can make the screw extruder system more effective and feasible. Hence, this device is suitable for mass production and can be widely used in actual production. REFERENCES Dingdu W, Ling H, 2009. Smith temperature control system based on fuzzy PID control algorithm, in Instrument technique and sensor, 2009-04-15.

In addition, as mentioned in the last paragraph, the whole structure is designed to be able to transmit the loading force to the ground when the operator is standing or walking around. All the functions and the mechanism will be discussed in the following sections. being impeded by the resistance from the gears. 3 Figure 1. As is demonstrated in Figures 1 and 2, the upper body part can be divided into four components: the cantilever, U1, U2, and U3. The cantilever, consisting of two beams (B1, B2) and one angle of aluminum, is used to support the steel cables and produce a distance between the operator’s body and the loads; U1, U2, and U3 are connected sequentially by the hinges; U1 and U3 both contain a DC servo motor and a group of two reels, which turn to winch the steel cables so that assistance is provided, while U2 contains mainly the servo drivers and the controller inside.

The speed sensor is used for measuring the output rotational speed of the hydraulic turbine, whose input terminal is connected to the hydraulic turbine shaft, and output terminal is connected to the input shaft of the hydraulic pump. The input circuit of the hydraulic pump connects with the oil tank, and the output oil circuit connects with the hydraulic valve block, and the valve block is equipped with a safe valve, an electro-hydraulic servo valve, etc. It can be realized the adjustment of the pressure difference at both ends of the valve port of the electro-hydraulic servo valve is achieved by adjusting the opening size of the electro-hydraulic servo valve.

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Topics in mathematical physics by Voronov A.A.

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