Linear electro-mechanical actuators are finding increased use in the field of thrust vectoring of launch vehicles. Earlier, linear electro-hydraulic actuators were used especially in the lower stages of the launch vehicles where there is a requirement for large actuation forces. However, electro-mechanical actuators are being scrutinized for this purpose in an effort to provide lighter, cleaner...

We report compact, low-cost and efficient Cr:Colquiriite lasers that are pumped by high brightness tapered laser diodes. The tapered laser diodes provided 1 to 1.2 W of output power around 675 nm, at an electrical-to-optical conversion efficiency of about 30%. Using a single tapered diode laser as the pump source, we have demonstrated output powers of 500 mW and 410 mW together with slope effic...

Abstract Thermal characteristic is important performance of the bearing, which reflects friction characteristics bearing. bearing will change along with internal behavior when fails. There a very complex coupling relationship. It an implication for thermal analysis cylindrical roller considering thermo-mechanical coupling. A model heat generation established based on method quasi-static and net...

In order to accurately measure and evaluate the quality of roller profile ultra-long flexible blade bearing, an error evaluation model is established for arc segment straight based on least square method, then overall proposed these two models. Through simulation a standard wind turbine cylindrical it found that in this work can effectively contour line bearing’s roller. The absolute 0.0319 mm,...

The investigation in this article focuses on the rolling resistance torque and thermal inlet shear factor tapered roller bearings (TRBs) through systematic experiments using a modular test setup. TRBs typically operate under Elastohydrodynamic Lubrication (EHL) conditions. At sufficiently high speeds, majority of friction is due to significant shift pressure centre EHL contact. While at lower s...