3results about How to "Improve transient performance" patented technology

This invention discloses a distributed adaptive fault-tolerant control method and system for nonlinear inline systems, relating to the field of distributed control technology for nonlinear inline systems. The method includes: for each subsystem in the nonlinear inline system, constructing the actual output of each actuator in the subsystem based on the fault type of the actuator; the nonlinear inline system includes several subsystems; for each subsystem, constructing a local objective function, an error optimizer, an auxiliary system, high-gain parameters, and a control law, and generating an optimal error trajectory based on the local objective function and the error optimizer. At the upper level, this invention designs an error optimizer to generate the optimal error trajectory based on a local objective function that converges to zero; at the lower level, it designs a trajectory tracking fault-tolerant controller with the help of an auxiliary system, employing a dynamic high-gain approach to adaptively handle the effects of uncertain parameters, actuator faults, and unknown strong inline coupling.

An electric sound stethoscope with double-channel compatible and collection switch relates to the field of medical auscultation, which is configured with double-channel compatible and convenient collection switch, analyzes and compares sound and sound wave pattern functions, and outputs two high-definition loudspeaker work of audio amplifier modules in two ways to connect two audio boxes, which is a new innovation for diagnosing heart and lung diseases. The excellent electric sound quality presents the extremely distinctive creative color of the system. The system includes electronic or traditional auscultation head to collect sound signals, and the sound signals are converted into electric sound signals by a microphone. The auscultation includes collecting heart and lung sound, and independently setting a microphone channel or a microphone wired socket interface with a convenient switch, forming the electric sound signal of the heart and lung auscultation collected by the convenient switch and the auscultation method to suppress howling. The electric sound signal enters the functional module circuit for processing through the appropriate transmission mode, amplifies the electric sound signal to drive the loudspeaker to broadcast and listen to the auscultation.

The application discloses a kind of based on variable gain fixed time observer's unmanned ship path tracking control method, the present application relates to ship motion control technical field, especially based on variable gain fixed time state observer's unmanned ship path tracking control method, include the following steps: step (1): establish unmanned ship geodetic coordinate system reconstruction mathematical model;Step (2): design dynamic error envelope and adaptive time scaling factor;Step (3): construct the variable gain fixed time extended state observer of same quality;Step (4): design backstepping path tracking controller based on dynamic surface technology;Step (5): simulation verification.The present application wants to solve the problem that unmanned ship is low in tracking accuracy under complex sea conditions and "fast tracking" and "noise suppression" is difficult to take into account, by introducing error dynamic envelope and adaptive gain adjustment mechanism, to improve the transient convergence speed and steady-state noise performance of path tracking.