Multivariable non-square systems with time delays widely exist in the chemical production process. Owing to the matrix that is adopted to describe non-square system is not square, many classical multivariable control methods can be hardly applied in such system. In this paper, based on non-square effective relative gain (NERGA), a novel internal model control method is proposed. Firstly the input and output loops of the non-square system are paired using NERGA, and then V-norm internal model controller is designed based on the model of squared subsystem. Finally, smulation study is carried out for a non-square system. The results can demonstrate the effectiveness of the proposed method.

Multivariable system with time delay and coupling widely exist in industrial which may destroy the normal work of control system. An unconventional internal model controller design method will be introduced in this paper. The closed loop system can be decouple by calculate the inverse of transfer function matrix and the optimal diagonal decomposition matrix. Finally, this method was applied in a multivariable system with different time delays, the simulation results can show the effectiveness of this method.

The properties of the structural silicone sealant under standard condition and after aging conditions were characterized. The results showed that the structural silicone sealant had very good ability to resist the ultraviolet in the long time. In the other aging environment conditions, the different failure time for the structural silicone sealant were appeared. The value of the maximum strength under the different mechanical aging factors obviously existed in the structural silicone sealant with different compositions. The residual strength that the attenuation ratio is more than 75% standard strength would keep the ultra high-rise building curtains safe and sustainable.