The thermally most efficient operation of a thermal regenerator, a particular type of heat exchanger, is analyzed through the minimum principle for distributed parameter systems and Laplace transform techniques. It is...
详细信息
The thermally most efficient operation of a thermal regenerator, a particular type of heat exchanger, is analyzed through the minimum principle for distributed parameter systems and Laplace transform techniques. It is found that for optimal operation the gas inlet temperature during the heating phase should equal its maximal allowable value, and that the optimal gas flow rate during the heating phase is constant.
The optimal-filtering problem of linear distributed-parametersystems corrupted by boundary and/or volume stochastic disturbances is considered. The optimal filter is shown to be a generalisation of that previously de...
详细信息
The optimal-filtering problem of linear distributed-parametersystems corrupted by boundary and/or volume stochastic disturbances is considered. The optimal filter is shown to be a generalisation of that previously derived for pure volume noise.
The optimal distributed and boundary control of nonlinear distributed-parametersystems with nonlinear cost functionals is treated. First- and second-order algorithms for improving a nominal distributed and/or boundar...
详细信息
The optimal distributed and boundary control of nonlinear distributed-parametersystems with nonlinear cost functionals is treated. First- and second-order algorithms for improving a nominal distributed and/or boundary-control function are developed. The approach of iteratively solving the distributed-parameter Hamilton-Jacobi equation, known as differential dynamic-programming technique, is followed. A simple example illustrates the theory.
An optimal control problem for a class of nonlinear distributed parameter systems is posed. By using a theorem of approximation theory, necessary and sufficient conditions upon the optimal controls are derived.
An optimal control problem for a class of nonlinear distributed parameter systems is posed. By using a theorem of approximation theory, necessary and sufficient conditions upon the optimal controls are derived.
A method is given for the automatic plotting of frequency-response loci for systems with poles or zeros in the right- or left-hand side of the s plane. A particular feature of the technique is that it is possible to p...
详细信息
A method is given for the automatic plotting of frequency-response loci for systems with poles or zeros in the right- or left-hand side of the s plane. A particular feature of the technique is that it is possible to plot loci for systems having pure time delays, and this is achieved without the necessity of providing a pure time-delay unit. The analogue-computer circuits are such that individual parameters of given transfer functions can readily be varied. Nyquist, Bode or other forms of locus can be plotted. The method can also be used to estimate transfer functions to fit experimentally obtained frequency-response data.
A study is made on the optimization aspect of marine propulsion in the light of optimum control theory for distributed parameter systems. In particular, the problem of determining the motion of a thin hydrofoil or a &...
详细信息
A study is made on the optimization aspect of marine propulsion in the light of optimum control theory for distributed parameter systems. In particular, the problem of determining the motion of a thin hydrofoil or a "thin fish" to maximize the average thrust in the presence of instantaneous or average power limitation constraint is considered. Solutions are obtained for the case of an oscillating hydrofoil having a finite number of spatial harmonics. Numerical results are presented for the special case of a flat oscillating hydrofoil. Their meaning is interpreted from the physical standpoint.
Stability of a distributedparameter system which is described by nonlinear parabolic equations with constant coefficients is studied by using Lyapunov's method. Sufficient conditions for the asymptotic stability ...
详细信息
Stability of a distributedparameter system which is described by nonlinear parabolic equations with constant coefficients is studied by using Lyapunov's method. Sufficient conditions for the asymptotic stability of the null solution are reduced to the conditions related to the system matrices and the positive definite condition of a certain matrix in the frequency domain.
暂无评论