The used ball mill system is a multi-variable nonlinear time-varying system with strong coupling and large delay.
The used ball mill system is a multi-variable nonlinear time-varying system with strong coupling and large delay. The controlled object of a typical ball mill system includes three input quantities (feed amount V, recirculated air volume W, hot air volume R) and three output amounts (differential pressure signal P, inlet negative pressure P, outlet temperature T). There is strong coupling between input and output, the recirculation air volume W has the greatest influence on the inlet negative pressure P, and the influence on the other two controlled variables can be neglected; the change of the hot air volume R causes the inlet negative pressure P and the outlet temperature T to change simultaneously; A change in the amount of coal V will cause the outlet temperature T and the grinding load to change simultaneously. Among them, the inlet and outlet pressure difference can indirectly reflect the grinding load. At the same time, the hot air volume R and the grinding load channel, the coal feeding amount V and the grinding load channel also exhibit a time delay characteristic.
If the parameter detection method is improved, the vertical vibration component Q of the used ball mill front is replaced by the differential pressure signal P to characterize the amount of coal stored. Therefore, the air volume will not affect the coal storage amount, and the influence of the coal supply amount on the negative pressure signal P may be Ignore, the effect on the exit temperature can be regarded as measurable disturbance for feedforward compensation, so that the original three-three out object is decomposed into a coupled two-input (R, W) two output (T, P) object and a single input V single output Q object.
Since the controller design of the single-input and single-out coal feeding circuit is similar to that of the general single-loop system, only the IMC-PID control design of the coupled two-in and two-out objects is discussed. For this TTTO object, the variable pairing is carried out according to the process requirements. The hot air volume R controls the temperature T, and the recirculating air volume W controls the negative pressure P, that is, the output Y=[TP]T, the input U=[RW]T, the temperature loop and the negative pressure The two loops of the loop still have strong coupling, so the controlled object can be described as Y=GU, where G is the transfer function matrix.
Contact Phone Address: No. 29, Times Road, Tianxin Xiaobeimen, Shifeng District, Zhuzhou City Source: http://China Hardware Business Network http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http ://news.chinawj.com.cn
The used ball mill system is a multi-variable nonlinear time-varying system with strong coupling and large delay. The controlled object of a typical ball mill system includes three input quantities (feed amount V, recirculated air volume W, hot air volume R) and three output amounts (differential pressure signal P, inlet negative pressure P, outlet temperature T). There is strong coupling between input and output, the recirculation air volume W has the greatest influence on the inlet negative pressure P, and the influence on the other two controlled variables can be neglected; the change of the hot air volume R causes the inlet negative pressure P and the outlet temperature T to change simultaneously; A change in the amount of coal V will cause the outlet temperature T and the grinding load to change simultaneously. Among them, the inlet and outlet pressure difference can indirectly reflect the grinding load. At the same time, the hot air volume R and the grinding load channel, the coal feeding amount V and the grinding load channel also exhibit a time delay characteristic.
If the parameter detection method is improved, the vertical vibration component Q of the used ball mill front is replaced by the differential pressure signal P to characterize the amount of coal stored. Therefore, the air volume will not affect the coal storage amount, and the influence of the coal supply amount on the negative pressure signal P may be Ignore, the effect on the exit temperature can be regarded as measurable disturbance for feedforward compensation, so that the original three-three out object is decomposed into a coupled two-input (R, W) two output (T, P) object and a single input V single output Q object.
Since the controller design of the single-input and single-out coal feeding circuit is similar to that of the general single-loop system, only the IMC-PID control design of the coupled two-in and two-out objects is discussed. For this TTTO object, the variable pairing is carried out according to the process requirements. The hot air volume R controls the temperature T, and the recirculating air volume W controls the negative pressure P, that is, the output Y=[TP]T, the input U=[RW]T, the temperature loop and the negative pressure The two loops of the loop still have strong coupling, so the controlled object can be described as Y=GU, where G is the transfer function matrix.
Contact Phone Address: No. 29, Times Road, Tianxin Xiaobeimen, Shifeng District, Zhuzhou City Source: http://China Hardware Business Network http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http ://news.chinawj.com.cn
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