Abstract:The optimal control of time-varying nonlinear systems is an important research topic and faces many difficulties and challenges, but also has substantial benefits. In this paper, the output optimization of scalar time-varying nonlinear (STVN) system and 2-dimension time-varying nonlinear (2DTVN) system is considered. The zeroing dynamics (ZD) method, which can solve the time-varying problems flexibly and effectively, has been extensively used in recent years. By introducing the ZD method, the time-varying opti… Show more
“…ird, the higher-order discrete algorithm (i.e., the ten-instant discrete algorithm) is more easily affected by the rounding error disturbance [44]. us, the experimental results of the DDD model in this study showing the divergence are actually complementing the previous research studies, in addition to the confirmation of [47] about divergence. erefore, we summarize that the DDD model is generally less effective, with further in-depth investigation being also a future research direction.…”
Section: Remarksupporting
confidence: 72%
“…According to the assumption of the matrix inverse problem, we can substitute A − 1 (t) with X(t) in (47) and thus obtain…”
“…Note that the convergence of DDD models is shown in [12,47], where the DDD models are utilized to solve the time-varying nonlinear optimization problems.…”
The time-variant matrix inversion (TVMI) problem solving is the hotspot of current research because of its frequent appearance and application in scientific research and industrial production. The generalized inverse problem of singular square matrix and nonsquare matrix can be related to Penrose equations (PEs). The PEs implicitly define the generalized inverse of a known matrix, which is of fundamental theoretical significance. Therefore, the in-depth study of PEs might enlighten problem solving of TVMI in a foreseeable way. For the first time, we construct three different matrix error-monitoring functions based on PEs and propose the corresponding models for TVMI problem solving by using the substitution technique and ZNN design formula. In order to facilitate computer simulation, the obtained continuous-time models are discretized by using ZTD (Zhang time discretization) formulas. Furthermore, the feasibility and effectiveness of the novel Zhang neural network (ZNN) multiple-multiplication model for matrix inverse (ZMMMI) and the PEs-based Getz–Marsden dynamic system (PGMDS) model in solving the problem of TVMI are investigated and shown via theoretical derivation and computer simulation. Computer experiment results also illustrate that the direct derivative dynamics model for TVMI is less effective and feasible.
“…ird, the higher-order discrete algorithm (i.e., the ten-instant discrete algorithm) is more easily affected by the rounding error disturbance [44]. us, the experimental results of the DDD model in this study showing the divergence are actually complementing the previous research studies, in addition to the confirmation of [47] about divergence. erefore, we summarize that the DDD model is generally less effective, with further in-depth investigation being also a future research direction.…”
Section: Remarksupporting
confidence: 72%
“…According to the assumption of the matrix inverse problem, we can substitute A − 1 (t) with X(t) in (47) and thus obtain…”
“…Note that the convergence of DDD models is shown in [12,47], where the DDD models are utilized to solve the time-varying nonlinear optimization problems.…”
The time-variant matrix inversion (TVMI) problem solving is the hotspot of current research because of its frequent appearance and application in scientific research and industrial production. The generalized inverse problem of singular square matrix and nonsquare matrix can be related to Penrose equations (PEs). The PEs implicitly define the generalized inverse of a known matrix, which is of fundamental theoretical significance. Therefore, the in-depth study of PEs might enlighten problem solving of TVMI in a foreseeable way. For the first time, we construct three different matrix error-monitoring functions based on PEs and propose the corresponding models for TVMI problem solving by using the substitution technique and ZNN design formula. In order to facilitate computer simulation, the obtained continuous-time models are discretized by using ZTD (Zhang time discretization) formulas. Furthermore, the feasibility and effectiveness of the novel Zhang neural network (ZNN) multiple-multiplication model for matrix inverse (ZMMMI) and the PEs-based Getz–Marsden dynamic system (PGMDS) model in solving the problem of TVMI are investigated and shown via theoretical derivation and computer simulation. Computer experiment results also illustrate that the direct derivative dynamics model for TVMI is less effective and feasible.
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