38results about How to "Eliminate disturbance effects" patented technology

A method for measuring small displacement in long-distance a coplane includes preparing cooperation mark plate and plotting cooperation mark Po, Pt and / or Pb, Pl and / or Pr on center, top and / or bottom, left and / or right on cooperation mark plate; connecting said plate to entity to be measured; collecting image of cooperation mark by camera and computer to calculate imaging ratio of image collected at initial state for obtaining displacement of Po on image then calculating actual displacement amount at vertical and horizontal directions of position to be measured .

The invention provides a test device for studying the change law of the flow field in the pipeline, which includes: a gas storage tank for storing gas; The gas tank is connected to the gas supply pipeline; the liquid supply pipeline, the liquid storage tank is connected to the liquid supply pipeline; the steady flow pipeline, the steady flow pipeline is connected to the outlet end of the gas supply pipeline and the outlet end of the liquid supply pipeline; The test pipeline, the test pipeline includes an ascending section, a descending section and an inclined section, the inlet end of the test pipeline is connected with the outlet end of the steady flow pipeline, and the outlet end of the test pipeline is connected with the liquid storage tank; multiple pressure sensors, Pressure sensors are arranged on the ascending section, the descending section and the inclined section. The invention solves the problem that the test method in the prior art cannot fully and accurately test the change of the flow field in the actual pipeline.

The bouncing movement guidance method at the end of the asteroid landing stage disclosed by the present invention aims at the problem of bouncing movement in the uncertain environment of the asteroid, starting from the requirement of reducing the number of bouncing times and ensuring the accuracy of the bouncing movement, and designing a bouncing movement at the end stage of the asteroid landing guidance method. The implementation method of the present invention is as follows: taking the attitude angle and angular velocity at the collision point of the lander as the control amount, and performing guidance by means of real-time trajectory planning for each bounce; The number of bounces; at each bounce collision point, the movement process of the lander to the target point is divided into an approach segment and a braking segment, and the bounce trajectory is planned through feedback correction in turn, so that the lander can move to the vicinity of the target point and Eliminate its horizontal velocity; obtain the control amount of the lander in this bounce by trajectory planning, eliminate the influence of parameter disturbance in the last bounce, and realize the robust guidance of the bounce trajectory. This method considers the need to reduce the number of bounces and the influence of parameter disturbance on the bounce motion, and can realize the precise bounce movement of the lander to the target point.

The invention relates to a construction method of a hybrid electric vehicle belt driven starter generator controller. The method comprises the following steps of forming a composite controlled object by using an expansion inverter control module, a hybrid electric vehicle BSG, a current detection module and a rotation speed and rotation angle detection and calculation module, establishing a composite controlled object model and a composite controlled object inverse model, enabling the composite controlled object model and the composite controlled object inverse model to be in series connection in a mode that the composite controlled object inverse model is in front of the composite controlled object model, using an output error of the composite controlled object and the composite controlled object model to drive the composite controlled object inverse model, using an output error of the composite controlled object and a reference model to adjust the weight parameter of an inversion controller in an online way, and forming an adaptive inverse controller by using the inversion controller, the composite controlled object model, the composite controlled object inversion model and the reference model. According to the method, the hybrid electric vehicle BSG system disturbance control and system dynamic characteristic control can be separately and independently processed, the two control can reach the best effect at the same time, and the controller has very strong robustness and anti-interference ability.

A system for measuring small displacement in remote a coplane is prepared as firm-joining cooperation mark with entity to be measured and connecting digital camera to image collection card being connected with computer for calculating out displacement data of cooperation mark then calculating out actual displacement amount of position to be measured.