Abstract: An assessment is made of a surveillance-radar control system designed to provide a sector-search capability and continuous control of antenna speed without unwanted torque-reaction on the supporting ...

Abstract: Some recent experimental studies have been concerned with the stabilization of rotating machinery through control action applied at critical points on the rotor. These studies have tended to ...

Abstract: A new approach is proposed to the identification of the eight linearized coefficients which characterize the dynamics of a journal bearing oil-film. The use of pseudo-random binary forcing ...

Abstract: It is shown that amplitude and phase spectra should not be used to assess the quality of estimates of oil-film coefficients unless the results are interpreted in conjunction with a sensitivity ...

Abstract: An analysis of the dynamic response of a nozzle-flapper valve with integral squeeze film damper (SFD) is presented. An expression for oil film forces, including the effect of fluid inertia, ...

Abstract: A theoretical model for an active squeeze film damper (SFD) is introduced. The design makes it possible to change the radial clearance and land length of the SFD by adjusting the position ...

Abstract: The frequency responses of an experimental electro-hydraulic position control system and a simulation of the system are compared. Three different valve models are used in the simulation in an ...

Abstract: The governing equations for a flexibly mounted stabilized platform are derived and solved using digital simulation. Theoretical predictions for the static and dynamic performance are compared with ...