Abstract: A method for measuring flow rate based on dynamic optimization of three pressure sensors is provided. In the method, pressure sensors are set on the fix positions of both ends of the test straight pipe and on the middle position of the test straight pipe, and are configured to measure the pressure of the fluid at the positions where the pressure sensors are set in real time, and the real-time dynamic flow rate of the fluid in the pipe can be estimated through a flow rate calculation estimator. The method has fast response speed and high measurement accuracy, can effectively eliminate the noise interference of vibration in the environment, and has strong anti-interference ability.

Abstract: A method for measuring flow rate based on dynamic optimization of three pressure sensors is provided. In the method, pressure sensors are set on the fix positions of both ends of the test straight pipe and on the middle position of the test straight pipe, and are configured to measure the pressure of the fluid at the positions where the pressure sensors are set in real time, and the real-time dynamic flow rate of the fluid in the pipe can be estimated through a flow rate calculation estimator. The method has fast response speed and high measurement accuracy, can effectively eliminate the noise interference of vibration in the environment, and has strong anti-interference ability.

Abstract: The present disclosure provides a gas-liquid coupling type fluid pulsation attenuator, which comprises: substrate, which is hollow and with an opening at one end; bladder, which is located at the hollow part of the substrate, and a first chamber is formed between the bladder and the inner wall of the substrate; and lining, which is located inside the bladder. The gas-liquid coupling type fluid pulsation attenuator of the present disclosure makes the fluid in the main pipe enter the first chamber through the opening of the substrate, and the bladder is filled with gas. Therefore, under the action of the pressure difference between the fluid pressure in the first chamber and the air pressure in the bladder, the bladder deforms, so as to absorb the flow pulsation through the expansion and contraction of the bladder, to make the oil flow in the hydraulic energy system more stable.

Abstract: A smart load-sensing EHA, comprising a variable displacement hydraulic pump, a symmetrical hydraulic cylinder, a feedback module, a pressure-following valve and an execution mechanism. The symmetrical hydraulic cylinder includes a symmetrical plunger, a first cylinder and a second cylinder separated by the plunger. The variable displacement hydraulic pump includes an oil inlet and an oil outlet. An output of the feedback module is to output a greater one of pressures at the first input and the second input to the execution mechanism. The pressure-following valve is connected between the output of the feedback module and an input end of the execution mechanism to reduce an instantaneous flow input to the input end of the execution mechanism and adjust pressure at the input end thereof. The execution mechanism is to receive an output of the feedback module and generate signal for changing displacement of the variable displacement hydraulic pump.

Abstract: Disclosed are a multi-wheel aeroplane braking system based on a self-energy-regenerative braking device and a controlling method therefor. The multi-wheel aeroplane braking system based on a self-energy-regenerative braking device can comprise a controller, a self-energy-regenerative braking device assembly, hydraulic pumps, and sets of braking actuators. The controller is connected to the self-energy-regenerative braking device assembly for sending a braking instruction thereto. The hydraulic pumps are respectively connected to the self-energy-regenerative braking device assembly for feeding a high pressure oil thereto under the driving motion of the aeroplane wheels. The self-energy-regenerative braking device assembly is configured to receive at least part of the high-pressure oil fed by the hydraulic pumps and the braking instruction sent by the controller and feeding the high pressure oil to each of the braking actuators according to the braking instruction.

Abstract: An intelligent load-sensing EHA, comprising a variable displacement hydraulic pump, a symmetrical hydraulic cylinder, a feedback module, a pressure-following valve and an execution mechanism. The symmetrical hydraulic cylinder includes a symmetrical plunger, a first cylinder and a second cylinder separated by the plunger. The variable displacement hydraulic pump includes an oil inlet and an oil outlet. An output of the feedback module is to output a greater one of pressures at the first input and the second input to the execution mechanism. The pressure-following valve is connected between the output of the feedback module and an input end of the execution mechanism to reduce an instantaneous flow input to the input end of the execution mechanism and adjust pressure at the input end thereof. The execution mechanism is to receive an output of the feedback module and generate signal for changing displacement of the variable displacement hydraulic pump.

Abstract: Disclosed are a multi-wheel aeroplane braking system based on a self-energy-regenerative braking device and a controlling method therefor. The multi-wheel aeroplane braking system based on a self-energy-regenerative braking device can comprise a controller, a self-energy-regenerative braking device assembly, hydraulic pumps, and sets of braking actuators. The controller is connected to the self-energy-regenerative braking device assembly for sending a braking instruction thereto. The hydraulic pumps are respectively connected to the self-energy-regenerative braking device assembly for feeding a high pressure oil thereto under the driving motion of the aeroplane wheels. The self-energy-regenerative braking device assembly is configured to receive at least part of the high-pressure oil fed by the hydraulic pumps and the braking instruction sent by the controller and feeding the high pressure oil to each of the braking actuators according to the braking instruction.