47results about How to "Engineering is easy to implement" patented technology

The invention discloses an identification method for lumped thermal parameters of a lithium ion battery. The identification method for the lumped thermal parameters is based on an lumped thermal equivalent circuit and special signal stimulation and by combination with a mathematical algorithm; according to the method, temperature rise of the battery is simulated based on the lumped thermal equivalent circuit; a thermal time constant in the environment is obtained by a temperature change experiment; a functional relation between impedance and temperature is established according to impedance at different temperatures; and by applying sine alternating current with single frequency and amplitude, relatively high accuracy of a battery thermal model is ensured; according to a battery temperature rise model and the functional relation between impedance and temperature, temperature change of the battery under special stimulation is circulated; and an actually-tested battery temperature is approached through a search iterative algorithm, so as to identify specific heat capacity and heat resistance of the battery. According to the method, complex test equipment, such as a heat insulating calorimeter, an isothermal calorimeter and other expensive thermal test equipment are not needed; and in addition, the method has the advantages of simplicity and reliability in identifying thermal parameters of the lithium ion battery, easy realization of engineering and the like.

The invention discloses a horizontal position control method based on a characteristic model. The method comprises the following steps of firstly, based on motion model analysis in a horizontal plane, through generalized inverse processing, acquiring a characteristic model form in which input and output are simultaneously decoupled and giving out a parameter range; and then operating a cycle control process; based on the characteristic model and the parameter range, carrying out on-line identification and acquiring a characteristic parameter estimation value; based on the characteristic parameter estimation value, designing a controller and calculating to acquire a control law; carrying out generalized interference estimation and estimating generalized interferences of two channels in the horizontal plane; carrying out coupling and conservative distribution processing and calculating to acquire an execution mechanism command; carrying out detection, configuration and decoupling processing, and calculating actual control amounts of the two channels. The control method adopts combination of adaptive combination control and generalized interference compensation based on the characteristic parameter estimation value so that simultaneous decoupling of the input and output is realized and maintenance precision of the horizontal position under the condition that a wind field changes randomly is increased.

The invention relates to a method and system for reconfiguring a relay subframe, and belongs to the technical field of wireless communication. The present invention predicts the traffic volume of the eNodeB and the Relay in the next subframe adjustment period according to the change of the eNodeB and the Relay traffic in the previous N subframe adjustment period, and judges whether the traffic of the DeNB and the Relay in the next subframe adjustment period is predicted. It is necessary to add Un subframes or reduce Un subframes, and reconfigure the RN subframes according to the results. When subframes need to be added, the number of subframes selected in the Un subframe configuration method corresponding to the DeNB cell uplink and downlink configuration method is increased. When the subframe configuration method needs to be reduced, the subframe configuration method with the reduced number of subframes is selected from the Un subframe configuration method corresponding to the uplink and downlink configuration method of the DeNB cell, so as to realize the configuration of subframes according to the traffic volume The method is adjusted to avoid the problem of data congestion caused by unreasonable subframe configuration. The invention is simple and easy to implement, easy to implement in engineering, and improves the performance of the relay node.

The invention discloses a simplified robust self-adaptive pitching-reduction control method for a multi-hulled ship. A heaving and pitching coupled movement model of the multi-hulled ship is established and converted into a state space form, and the heaving and pitching coupled movement model is decomposed into a heaving movement model and a pitching movement model which are decoupled; according to the heaving movement model and the pitching movement model which are decoupled, expansion state observing devices are separately designed and used for estimating movement states and coupling items of the multi-hulled ship; by combining the steps, the virtual controlling quantity is obtained by integrating the basic controlling quantity of the multi-hulled ship and the estimated coupling items, and the virtual controlling quantity is distributed to attack angles of T-shaped wings and a spray strip. Variation of the heaving height and the pitching angle of the multi-hulled ship is controlled through force and moment generated by the attack angles. The control method is simple, reliable and easy to realize, and can effectively achieve the purposes that heaving of the multi-hulled ship is reduced by 20%-35%, and pitching of the multi-hulled ship is reduced by 40%-50%.

The invention discloses an airship radar conformal thinned array antenna and its signal processing method. The conformal thinned array antenna comprises a plurality of sparsely-distributed subarrays on a ship body. The subarrays adopt active phase control subarrays, and a rigid structure is adopted to guarantee subarray face control precision. A receiving / transmitting assembly of the subarrays is a stereoscopic integrated tile structure with radiation array elements. Each subarray transmits and receives frequency division or code division orthogonal signals so as to realize a full-array transmit-receive function. Observation scope of the conformal thinned array antenna is determined by subarray antenna beamwidth. High spatial resolution is realized by full-array antenna. The airship radar with the conformal thinned array antenna is used for high-resolution ground imaging and moving object detection.