... dynamics are estimated such that they are dependent on the state and the control input. The optimal control strategy is then derived which minimizes uncertainty of the closed loop system. In the absence of reliable plant models, the proposed control algorithm incorporates uncertainties in model parameters...

... 30 12 2011 30 12 2011 closed loop systems control system synthesis nonlinear control systems pendulums reduced order systems stability variable structure systems Sliding mode control [( 1 )] has been shown to be a robust and effective nonlinear control approach...

... aerospace control aerospace propulsion atmospheric turbulence closed loop systems control system synthesis transfer functions References 1 Nastrom , G. D. , and Gage , K. S. , 1985 , “ A Climatology of Atmospheric Wavenumber Spectra of Wind and Temperature Observed...

... and integral output feedback H ∞ /passivity stabilizability are proposed for the closed-loop system in terms of matrix inequalities. These new characterizations possess a special monotonic property, which underpin the convergence of a linearized iterative computational algorithm. The effectiveness and merits...

... control has been shown to provide all of the benefits of integral control: disturbance rejection, servo tracking, and force estimation. The controller also linearizes the closed-loop system. More importantly, the nonlinear controller is shown to be equivalent to an estimator of the exogenous force...

... selected modes of full-order model will be attained to guarantee the stability of closed-loop system. A 16-DOF proportional damped truss system Comparison between the full-model, SEREP, and SREM FRFs Comparison between the full-model, modal truncation, and SREM FRFs It can...

...Matthew B. Greytak; Franz S. Hover First-excursion times have been developed extensively in the literature for oscillators; one major application is structural dynamics of buildings. Using the fact that most closed-loop systems operate with a moderate to high damping ratio, we have derived a new...

..., the systems under consideration are not uniformly completely observable. Combining the output feedback domination approach and block-backstepping scheme together, a series of linear output feedback controllers are constructed recursively for each subsystems and the closed-loop system is rendered semiglobally...

...-loop system is stable for all the prescribed uncertainties under the proposed PD controller with a gain K > 1 / 2 . 8 . This is because the closed-loop system is stable for any chosen nominal system and the critical point - 1 + j 0 is outside the frequency response envelope...

... with an in-domain nonlinearity is considered first. For this system a nonlinear feedback law, based on gain scheduling, is derived explicitly, and a proof of local exponential stability, with an estimate of the region of attraction, is presented for the closed-loop system. Control designs (without proofs...

... not use any fault detection and isolation mechanism to detect, separate, and identify the actuator faults online. The attitude orientation and angular velocity of the closed-loop system asymptotically converge to zero despite actuator faults providing the nominal attitude system is asymptotically stable...

... 28 10 2010 11 04 2011 11 04 2011 closed loop systems gas sensors Recent advances in extremum seeking have shown it to be a powerful tool in real time nonmodel based control and optimization ( 1 2 3 4 5 6 ). Success has been achieved in compensating slow actuator...

... delays in S-C and C-A links. The closed-loop system is further formulated as a special jump linear system. The sufficient and necessary condition to guarantee the stochastic stability is derived. Simulation studies and experimental tests for an experimental hydraulic position control system are presented...

..., vibration and harshness (NVH), have been greatly reduced due to the significant advances in turbocharging, fuel injection systems, combustion optimization, and aftertreatment technology ( 1 ). closed loop systems combustion diesel engines Kalman filters least squares approximations pressure...

.... This model based approach to cylinder imbalance estimation has several advantages over the current empirically based methods including robustness and ease of calibration. 01 03 2010 15 10 2010 23 03 2011 23 03 2011 closed loop systems engines exhaust systems feedback...

... stability of the closed-loop system is analyzed in detail, and a stability condition is proposed. Simulations are given to demonstrate the excellent tracking and disturbance rejection capabilities of the UDE-based control strategy. 24 03 2009 23 09 2010 22 02 2011 22 02 2011...

... and uncertain time-delay flexible structure systems. The algorithm is based on the sliding mode control and H ∞ / μ techniques. This scheme guarantees closed-loop system stability, and yields good performance and robustness in the presence of parametric uncertainties, time-delays and external disturbances...

... modeling (up to 200 MPa) ( 1 2 ). closed loop systems control system synthesis electromagnets pistons pneumatic systems pressure control valves 12 11 2009 17 07 2010 22 12 2010 22 12 2010 2011 American Society of Mechanical Engineers ...

..., and subsequently controllers are scheduled by adopting a certain interpolation procedure. The proposed controller ensures the stability and robust L 2 -performance of the closed-loop system due to vertex property of the polytopic LPV shaped plant. The effectiveness of the design method has been illustrated through...

... Φ i = [ Ψ 1 i K i C i 0 Ψ 3 i ] ,     Θ i = [ K i D 1 − K i D 3 ] 05 11 2009 04 07 2010 24 11 2010 24 11 2010 asymptotic stability closed loop systems feedback linear...