32results about How to "Solve the problem of low control precision" patented technology

The invention discloses rotating speed control method and device, a storage medium and an air conditioner. The method comprises the following steps of determining a current liquid level height of a water tank in a water splashing motor; determining a theoretical target rotating speed of the water splashing motor according to the current liquid level height; and determining a current target rotating speed of the water splashing motor based on the theoretical target rotating speed and in combination with a current environment temperature or a current evaporator temperature of an air conditionerprovided with the water splashing, and controlling the operation of the water splashing motor according to the current target rotating speed. According to the scheme, the problem that the control precision of the water splashing motor is low can be solved, and the effect of improving the control precision of the water splashing motor is achieved.

The invention relates to a high-precision radiation-resistant microsatellite three-axis magnetorquer which comprises two magnetic rods provided with metal cores, a hollow magnetorquer body, a processor and magnetometers. The two magnetic rods provided with the metal cores form an X-axis magnetic rod and a Y-axis magnetic rod respectively and are wound by coils, the hollow magnetorquer body forms a Z-axis hollow coil, the X-axis magnetic rod, the Y-axis magnetic rod, the Z-axis hollow coil, the processor and the magnetometers are integrated into a PCB and form modularization, and three execution mechanisms are independently driven by PWM signals. The invention further relates to a work method of the high-precision radiation-resistant microsatellite three-axis magnetorquer. The high-precision radiation-resistant microsatellite three-axis magnetorquer and the work method thereof have the advantages that reliability of the magnetorquer is improved, and control precision of the magnetorquer is improved; the functions of current monitoring and temperature measuring are achieved, the magnetic rods and a fastening piece are integrally designed, the magnetorquer is convenient to assemble, and strength is increased.

The invention discloses an atmosphere stabilizing device of a diffusion hearth. The atmosphere stabilizing device comprises a tail gas exhaust tube, a tail gas exhaust box, a buffer box, an electric adjusting valve and a main exhaust tube, one end of the tail exhaust tube of a diffusion furnace is connected with a diffusion furnace tube, and the other end of the tail exhaust tube is connected with the main exhaust tube via the tail gas exhaust box, the buffer box and the electric adjusting valve sequentially. The atmosphere stabilizing device effectively solves the problem that a manual control valve is low in control precision in the prior art, and is mounted conveniently and fast, influence to the process atmosphere in the diffusion furnace tube when factory exhaust fluctuates is avoided, and an existing atmosphere stabilizing device of a diffusion hearth is not required to be greatly modified.

The invention belongs to the technical field of robots, and relates to an ankle joint of an exoskeleton robot with three flexible drive branches, comprising a calf fixing block, a restraint branch, a foot plate, a first drive branch, a second drive branch and a third drive branch; the foot plate Connect the leg fixing block through the restraining branch, one end of the first driving branch, the second driving branch and the third driving branch are set on the calf fixing block, and the other end is hinged with the sole of the foot; through the linkage between the first driving branch and the second driving branch The soles of the feet are driven to realize varus / valgus rotation; the soles of the feet are driven to realize dorsiflexion / plantarflexion rotation and internal rotation / external rotation through the linkage of the first drive branch, the second drive branch and the third drive branch. The invention has three rotational degrees of freedom, and each degree of freedom is an active degree of freedom, and can bionically reproduce the dorsiflexion / plantarflexion rotation, varus / valgus rotation, and internal rotation / external rotation of the ankle joint of the human lower limb.

The invention discloses an electronic expansion valve control method and device and an air-conditioning machine set. The electronic expansion valve control method comprises the following steps: detecting the exhaust temperature of a compressor; detecting the air sucking temperature of the compressor; detecting the temperature of a throttle point, wherein the temperature of the throttle point is the temperature of the throttle point after the electronic expansion valve is throttled; selecting a present control strategy from preset control strategies according to the exhaust temperature, the air sucking temperature and the temperature of the throttle point; controlling the opening degree of the electronic expansion valve according to the present control strategy. By adopting the electronic expansion valve control method and device and the air-conditioning machine set, the problem that in the prior art the control precision of the electronic expansion valve is low is solved, and the effect of improving the control precision of the electronic expansion valve is achieved.

The invention provides a feedback control method for the fuzzy time delay state of uncertainty time-delay two-time scale systems (UTDNTTSSs), and belongs to the technical field of high-precision control of complex systems. According to the method, based on an uncertainty standard disperse fuzzy singular perturbation model, a fuzzy time-delay state feedback controller is designed, and high-precision control over the complex UTDNTTSSs is achieved. Fuzzy logic, a singular perturbation technology and a time delay and uncertainty system theory are fused, the uncertainty standard disperse fuzzy singular perturbation model of the controlled UTDNTTSSs is established, combining with the fuzzy logic and a time-delay system theory, the fuzzy time-delay state feedback controller is designed, a spectral norm and LMIs method is adopted, it is deduced that sufficient conditions exist in the controller, high-precision control simulation is conducted through a CE150 helicopter attitude control system, and the specific implementation process and the effectiveness of the method are shown. The feedback control method for the fuzzy time delay state of the UTDNTTSSs has the advantages of solving the problem that in the existing modeling and control method of the UTDNTTSSs, steady state errors caused by time delay, quick modality and parameter perturbation can not be removed, and the control performance of the UTDNTTSSs is greatly improved.