This paper presents a new intelligent control scheme which utilizes particle swarm optimization (PSO) for off-line tuning of proportionalintegral-derivative (PID) controller for the twin rotor multi-input multioutput system (TRMS). The control objective is to make the beam of the TRMS move quickly and accurately to the desired attitudes. The TRMS exhibits MIMO characteristics, high order non-li...

In this paper, Neuro-Fuzzy based Fuzzy Subtractive Clustering Method (FSCM) and Self Tuning Fuzzy PD-like Controller (STFPDC) were used to solve non-linearity and trajectory problems of pitch AND yaw angles of Twin Rotor MIMO system (TRMS). The control objective is to make the beams of TRMS reach a desired position quickly and accurately. The proposed method could achieve control objectives wit...

In this paper, twin rotor multi input multi output system (TRMS) is considered as a prototype laboratory set-up of helicopter. The aim of studying the model of TRMS and designing the controller for it is to provide a platform for controlling the flight of helicopter. An optimal state feedback controller based on linear quadratic regulator (LQR) technique has been designed for twin rotor multi i...

A rotor-journal bearing system for a twin rotary compressor has been nlliDerically analyzed to estimate the reliability and to optimize the bearing design. For rotary compressors, large dynamic loads act on the rotor. They are unbalanced forces due to eccentric rotation parts and gas forces induced by the difference in pressure between compression and suction gases. In such a case, the rotor-jo...

In this study, the effects of rotor–rotor interaction on wake characteristics were investigated experimentally for a twin-rotor configuration in axial descent. The velocities measured at descent rates (descent speed/induced velocity rotor disk during hover) from 0.87 to 1.52, and strength was controlled by adjusting distance between tips. As rate increased, isolated gradually entered vortex rin...

This paper presents the design of a Multi-Input Multi-Output (MIMO) PID controller for twin-rotor MIMO system. A multivariable control system consisting two loops is designed non-linear with inputs and outputs. The controllers have been tested on simulated model different possibilities real-time results were taken. efficiently controls does not suffer from any process interactions. indicate tha...

Oscillating !waring load; occur in twin >Crew compre~sor~ in the absence of rotor chatter due to '"''"r"l effects. ;\mo~g thc;c <\I'C tl1e time varying moments and forces impm·tNI ou each 1·otor during the comprcS>ion process. Utilizing assumptions which simplify the roto1· profile geonwtry, a geuer;.t' medwd for· computin~ the compression load• on each rotor is accomplished. A cbssic«l model o...

The twin-screw compressor is constantly attaJ.ninq hiqher performance due to new rotor profiles, new rotor manufacturing technology and new designs. Besides this, new refrigerants as well as new lubricants can be expected on the market. Therefore there is always a need to update performance data. To m1nimize the number of test points and still receive representative data, there 1s a need of an ...

Modelling of screw compressors using Computational Fluid Dynamics (CFD) offers better insight into the working chamber of twin screw machines when compared with chamber models. As shown by authors in earlier publications, CFD models predict performance of dry gas and refrigeration compressors fairly accurately. However numerical flow models used for modelling of oil flooded twin screw compresso...