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IEE Proceedings - Control Theory and Applications

Issue 6 • Date Nov 1994

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Displaying Results 1 - 10 of 10
  • Advanced aircraft flight control using nonlinear inverse dynamics

    Publication Year: 1994, Page(s):418 - 426
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (484 KB)

    A series of studies concerning the control of aircraft using nonlinear inverse dynamics based control techniques is presented. Following a summary of the inverse dynamics control theory, a design procedure for effective use of the method for flight control is generated. The novel features of the design have included the direct incorporation of handling qualities specification in the controller syn... View full abstract»

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  • New sequential design procedures for multivariable systems based on Gauss-Jordan factorisation

    Publication Year: 1994, Page(s):427 - 436
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (508 KB)

    We exploit the use of Gauss-Jordan factorisation to simplify the design of a multivariable system. It shows that the effects of closing a multivariable feedback system in sequential order can also be obtained by performing successive Gauss-Jordan eliminations on its return difference matrix. This simple elimination procedure enables us to transform a multivariable design into a series of multi-inp... View full abstract»

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  • Decentralised multivariable control and stability of a gas turbine engine

    Publication Year: 1994, Page(s):357 - 366
    Cited by:  Papers (1)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (504 KB)

    The problem of improving the performance and stability of a gas turbine aircraft engine operating throughout the whole flight envelope in the presence of predominantly destructive dynamical interactions is addressed. The controller structure aimed for in this work is decentralised, thus making the system tolerant to soft and/or hard failures while at the same time allowing the tuning of every loop... View full abstract»

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  • Neural network based parameter estimation of unstable aerospace dynamic systems

    Publication Year: 1994, Page(s):385 - 388
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (240 KB)

    The application of neural network based schemes for parameter estimation of unstable/augmented aerospace dynamic systems is considered. The parameter estimation algorithms are programmed within the structure of recurrent neural networks (RRNs). Numerical simulation results are given View full abstract»

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  • Parallel algorithm for pole assignment of multi-input systems

    Publication Year: 1994, Page(s):367 - 372
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (332 KB)

    A general parallel algorithm for pole placement via linear state variable feedback based on Sylvester's equation is proposed. The prescribed eigenvalues may be the same as the open-loop eigenvalues or disjoint from them and can be of any order of multiplicity. The algorithm uses block Hessenberg forms for numerically reliable computation. Results of robustness of closed-loop pole assignment are gi... View full abstract»

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  • Exponentially stable robust control law for robot manipulators

    Publication Year: 1994, Page(s):389 - 395
    Cited by:  Papers (12)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (424 KB)

    Robust control has a chattering problem since the control laws are discontinuous functions. To improve this, a boundary layer can be introduced; however the system then loses asymptotical stability and is only globally stable. An exponentially stable robust nonlinear control law for robot manipulators, based on Lyapunov stability theory, is presented. The robust control law is designed using a spe... View full abstract»

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  • Total control of fast coordinate measuring machines

    Publication Year: 1994, Page(s):373 - 384
    Cited by:  Papers (1)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (776 KB)

    The design of CMM has undergone a radical change with the aim of improving speed and measurement accuracy. This is achieved by substituting the analogue component with high speed digital processors and the mechanical components by high power electronic devices. The control system is, however, hardly changed. Requirements of speed and accuracy should be simultaneously satisfied. To ensure the total... View full abstract»

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  • Criteria for stability of zeros of sampled systems

    Publication Year: 1994, Page(s):396 - 402
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (316 KB)

    Simplified forms of criteria are presented for ensuring that all zeros of a discrete system are stable when a continuous-time and strictly proper plant is discretised by the use of a sampler and a zero-order holder. The Nyquist algorithm proposed by Fu and Dumont (1989) has been improved in the sense that a point of the Nyquist curve is obtained analytically. When a lowpass system is sampled, anal... View full abstract»

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  • Dynamic programming approach for nonlinear systems

    Publication Year: 1994, Page(s):409 - 417
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (472 KB)

    The objective of this paper is to study by means of dynamic programming the optimal control of nonlinear continuous systems. We apply to these systems a development of block pulse for the state and a nonuniform discretisation of the state space. As a particular case of a nonlinear system, we analysed a continuous dual control problem, and we carried out an implementation of a stochastic control po... View full abstract»

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  • Estimation of model error for nonlinear system identification

    Publication Year: 1994, Page(s):403 - 408
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (312 KB)

    Algorithms are presented for estimation of deterministic model error in the assumed models of nonlinear discrete and continuous time systems. The explicit model error time histories are parameterised using least squares method. The parameterised models relative to the true model explain the deterministic deficiency in the chosen models, in the sense of minimum model error. The algorithms have appe... View full abstract»

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