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        A Probabilistic Approach for Model Following of Markovian Jump Linear Systems Subject to Actuator Saturation

        Linpeng Wang,Jin Zhu,Junhong Park 제어·로봇·시스템학회 2012 International Journal of Control, Automation, and Vol.10 No.5

        This paper is concerned with the model following problem of Markovian jump linear systems (MJLSs), which suffer from stochastic uncertainties and actuator saturation. By applying a probabilistic approach based on particles, a sequence of control inputs is designed to guarantee that the model following error remains within a desired region in a certain probability, as well as the control cost is optimal. Motivated by this, the stochastic control problem is represented by chance constrained pro-gramming, and approximated as a determinate optimization one, which is solved by mixed integer li-near programming (MILP). Furthermore, an improved particle control approach is proposed to reduce the computation complexity. The effectiveness of this improved approach is demonstrated by an example along with complexity comparison.

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        Experimental Study on Load-Bearing Capacities of Frame-Type Scaff olds Used in Precast Construction

        Jui-LinPeng,Pao-Li Wang,Siu-Lai Chan,Po-Kai Wu 한국강구조학회 2020 International Journal of Steel Structures Vol.20 No.2

        In precast construction, because the precast beams are broader and the frame-type steel scaffolds need to bear more weight, such as that of the precast slabs and precast beams, the dimensions and load-bearing capacities of the frame-type steel scaffolds are different from those of traditional door-type steel scaffolds. The results of this study show that based on the load-bearing capacities of the five different combined setups of frame-type steel scaffolds used in this study, the horizontal members of the square-type and rectangle-type steel scaffolds are able to enhance the load-bearing capacities of the combined setups of the frame-type steel scaffolds. Therefore, when adopting combined setups of frame-type steel scaffolds, it is advisable to refrain from using only door-type steel scaffolds on construction sites. The ability of jack bases to enhance the load-bearing capacities of frame-type steel scaffolds is not significant. Under the condition of an eccentric load located at one-third of both the x-axis and y-axis, the load-bearing capacity of the frame-type steel scaffolds reduces to 60% of that when no eccentric load is involved. When a lateral force is applied, the critical load of frame-type steel scaffolds decreases with increasing lateral forces.

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