... with effective flow control algorithms is required for this type of wind tunnels. In this paper, an extended Kalman filter (EKF) based flow control strategy is proposed and implemented. The control strategy is designed based on state estimation of the blowdown process under the EKF structure. One...

... switching does not occur. From Eq. (34) , one can see that a little increase of leakage coefficient C will greatly increase the damping coefficient because ɛ is small. Thus, pressure curve will decay faster if an extra leakage is introduced. For this purpose, a pair of flow control valves...

... control flow control periodic reference tracking The disturbance rejection and reference tracking problem of periodic signals is encountered in many engineering systems. As such, there has been extensive research on repetitive control documented in the literature over a wide range...

... an , u flow ca ] Typical implementation methods for the reactant flow rates include pressure control and flow control. In flow control, the upstream pressure is held constant and a valve opening position is determined to provide the desired flow rate into the channel 36 W...

... of Electromagnetic Actuators ,” Mechatronics 0957-4158 , 7 ( 7 ), pp. 589 – 598 . 10.1016/S0957-4158(97)00028-7 Lequesne , B. P. , 1988 , “ Finite-Element Analysis of a Constant-Force Solenoid for Fluid Flow Control ,” IEEE Trans. Ind. Appl. 0093-9994 , 24 ( 4 ), pp. 574 – 581 . 10.1109...

.... Results from several experiments are presented and compared. actuators flow control intelligent materials nonlinear control systems position control Over the past 20 years, research in the field of miniature actuators has increased substantially due to advances in smart material fabrication...

... channel flow flow control flow instability hypersonic flow Navier-Stokes equations Poisson equation state feedback Streamwise equilibrium velocity U e ( y ) (left) and U y e ( y ) (right) for different values of H . Solid, H = 0 ; dash-dotted...

... system synthesis design engineering flow control mechatronics sloshing Detrimental effects of liquid sloshing are experienced in a number of areas, including the space launch vehicles and satellites, the transportation of liquid cargo, aircraft, in systems handling molten metal, and so...

...-2789 10.1016/S0167-2789(00)00042-7 , 142 ( 1–2 ), pp. 1 – 19 . Fitzpatrick , K. , Feng , Y. , Lind , R. , Kurdila , A. J. , and Mikolaitis , D. W. , 2005 , “ Flow Control in a Driven Cavity Incorporating Excitation Phase Differential ,” J. Guid. Control Dyn. 0731-5090...

... 24 03 2007 03 07 2008 05 12 2008 bifurcation compressors engines feedback flow control Lyapunov methods robust control robustness bifurcation stabilization L 2 gain compressor control Rotating stall and surge are aerodynamic instabilities introduced...

... a feedback control problem of the Mach number in a wind tunnel. flow control periodic control optimal control distributed control nonlinear dynamical systems feedback partial differential equations hyperbolic equations actuators variational techniques wind tunnels Mach number While...

... information. 10 08 2004 03 09 2005 automotive components rotational flow valves hydraulic systems jets power transmission (mechanical) design engineering flow control distributed control mechanical engineering computing neural nets spool valve fluid control systems...

.... These elements are used to better model mechatronic systems that have embedded energy sources. A procedure for passifying mechatronic systems is then developed using the four-way directional electrohydraulic flow control valve as an example. The passified valve is a two-port system that is passive with respect...

... fuel systems fuel optimal control parameter estimation closed loop systems feedforward feedback control system synthesis flow control Owing to stringent governmental automobile emission regulations, the precise control of engine fueling has received considerable attention within...

...D. Wu; R. Burton; G. Schoenau; D. Bitner A pressure-compensated valve (PC valve) is a type of flow control device that is a combination of a control orifice and a compensator (often called a hydrostat). The compensator orifice modulates its opening to maintain a constant pressure drop across...

... 2003 pumps flow control geometry fast Fourier transforms Hydraulic pumps are the power-supplying components within hydraulic circuitry. All pumps used in hydrostatic pressure systems are of the positive displacement type. Nonpositive displacement pumps, usually characterized...

... Dynamic Systems and Control Division September 11, 2002; final revision, March 15, 2003. Associate Editor: N. Manring. 11 September 2002 15 March 2003 18 09 2003 flow control compensation pressure control hydraulic systems switching minimisation optimal control...

... to Delay or Advance Linear Loss of Stability in Planar Poiseuille Flow, Proc. R. Soc. London A, 447 , pp. 299–312), a linear stability analysis of such a feedback control is developed in this paper. The Poiseuille flow control problem is reduced to a modified Orr-Sommerfeld equation coupled with a heat...

... revision, February 2002. Associate Editor: N. Manring. 01 February 2001 01 February 2002 16 12 2002 packaging materials handling flow control valves pneumatic control equipment The conventional methods of manufacturing electronic assemblies, in which the electronic...

...Randall T. Anderson; Perry Y. Li A nonlinear dynamic model for an unconventional, commercially available electrohydraulic flow control servovalve is presented. The two stage valve differs from the conventional servovalve design in that: it uses a pressure control pilot stage; the boost stage uses...