This research investigates the outcome of wire EDM process over the taper cross-sectional workpieces of Titanium Alloy (Ti6Al-4V). The outcomes result in better kerf width, surface finish, wire wear and metal removal rates, which can be controlled by taper angle of the workpiece, current, and pulse-off time. The effect of these parameters over the four outcomes of the wire EDM process have been studied in this research. Mathematical models have been developed to predict the outcomes.

To strengthen the convective heat transfer ability of the limited cooling air in the cabin, temperature field homogenization (TFH) in the core flow region of the engine block area was achieved. The TFH optimization model helped minimize the temperature gradient in the core flow region and maximize it at the heat transfer boundary, and the optimum vector field and flow path were obtained. More comprehensive changes to the structural design were made according to the TFH.

In helicopter flight simulators, the joystick is a key element, which is used to achieving a reliable helicopter driving while providing a force feedback feeling. In the flight control process, the current force of the haptic interface needs to be used as the simulation calculation of the feedback force. This paper proposes a different strategy aiming at avoiding the use of an expansive and complex force/torque sensor.

The pressure compensation is the most commonly used method at home and abroad to reduce the impact of external seawater pressure on the hydraulic system. The pressure compensator is the key equipment of the pressure compensation system. In this paper, the pressure characteristics of the bellows-type pressure compensator are analyzed. Through the control variable method, the influence of different design parameters on the dynamic characteristics of the pressure compensator is studied.