This paper proposes the implementation of a novel predictive control scheme known as Adaptive Generalized Predictive Control (AGPC) in the actuation system of a high-powered Test rig. Through the use of actuation system, the required torque for simulating different conditions can be applied to the Tested gearboxes. Accurate and precise control of this system is of great importance as it a, ects the overall performance of the Test rig. The considered actuation system in this investigation is an electro-hydraulically driven system with nonlinear and uncertain characteristics. The performance of the proposed control scheme in di, erent conditions of the parametric uncertainty as well as the presence of disturbances is evaluated and the results are discussed. The obtained results confirmed the superior performance of the proposed scheme in different studied conditions.

In order to prevent the horseshoe vortex and secondary flow losses in small supersonic turbines, the partial admission technique is used. It is obvious that the partially injection of flow creates a new type of loss which is called partial-admission loss. Therefore, in the design process, the partial-admission degree and flow injection configuration should be evaluated accurately.To that end, it is necessary to produce the characteristic curves of the turbine in this condition. These curves are provided in the form of turbine performance parameters and represent the turbine behavior in different operational conditions. …

A new reduced–scale Test rig is developed owing to significantly contribute to the applicability of the laboratory Tests on rolling contact fatigue (RCF) in wheel-rail material. This paper introduces the dynamic analysis of the Test rig, in order to assess the vibration behaviour of the system with respect to contact phenomenon. Finite element modelling (FEM) is used to simulate the mechanical behaviour of the Test rig, representing dynamic response of the components under wheel impact loading conditions. To study the influence of scaling on the new rig, and to understand the functional relationships between the mechanical parameters, two tentative scales i.e.1.5 and 1.7 are defined as global scale factors of the rig. FE models of the scaled Test rig together with a model of actual-size railway system are analysed and their dynamic characteristics are compared. Based on results of dynamic simulations, a strong evidence of association between the chosen scale factors and dominant frequencies of vibrations was found. The major dynamic parameters of the new Test rig are lastly derived based on the numerical investigations.

The refrigeration system excution with the nano oil was explored to enhance the coefficient of performance (COP) of the vapor compression refrigeration system (VCRS) using CARE 30 which is a mixture of 50% refrigerant R200 and 50% refrigerant R600a in which 1 gram of Copper oxide (CuO) nano particles (NP) are used.  Nano lubricant was used in the compressor of R-134a refrigeration system (compatible with CARE 30) mixed with polyolester (POE) oil.  To execute this examination, a Test setup was planned and fabricated in the workshop.  The outcome demonstrates that CARE 30 and POE oil with CuO NP works typically and securely in the refrigeration system.  The refrigeration system performance found is better than the customary CARE 30 and POE oil only refrigertion system.  Therefore, the nano lubricant (POE compressor lubricant mixed with CuO NP) could be used as a vital piece of refrigeration system to lower the energy consumption and for the enhancement of COP of VCRS.

Misalignment effects increase the risk of scratch or seizure failure for the journal bearings-rotor system. To investigate the performances of misaligned journal bearings, a full-scale journal bearings-rotor system Test rig is designed and journal orbits are Tested under different speeds. Then, a THD lubrication model is established to simulate lubrication performances under different misalignment conditions. The results show that for a misaligned journal bearings-rotor system, the center of the orbits of the bearing closing to coupling is fixed around the coupling. The orbits center of the bearing far away coupling is floating gradually with an increasing speed. The vibration amplitude of bearing closing to coupling is larger than that of bearing far away from the coupling. When the minimum oil film thickness is decreasing, the maximum film temperature is increasing except for the bearing closing to coupling. For different misalignment directions, maximum film temperature is determined by the position of the high pressure zone and high temperature zone.