5results about How to "Reduced dynamic performance" patented technology

The invention discloses a mechanical arm joint vibration suppression method and device, electronic equipment and a readable storage medium, and the method comprises the steps: obtaining a state feature data set of a mechanical arm joint in a preset operation state, and building a double-inertia system model of the mechanical arm joint according to the state feature data set; the output torque of the mechanical arm joint is predicted through the double-inertia system model, and a first transfer function used for representing the vibration degree of the mechanical arm joint is obtained; optimizing the first transfer function in combination with the output torque to obtain a second transfer function added with a damping item; and a damping item in the second transfer function is adjusted, so that vibration suppression of the mechanical arm joint is achieved. Vibration suppression of the mechanical arm joint is effectively achieved, the use scene of the vibration suppression technology is widened, and the influence on the dynamic performance and stability of the mechanical arm joint is reduced.

The application relates to the technical field of semiconductors, and discloses a bidirectional semiconductor device control circuit, which comprises a bidirectional device, the bidirectional device being a single-gate bidirectional semiconductor device, and the bidirectional device having a substrate electrode; and a potential adjusting unit connected with the bidirectional device and used for controlling the potential difference between the potential of the substrate electrode and the lowest potential of the bidirectional device to be less than or equal to a first preset voltage value when the bidirectional device is in a certain working state or is switching the working state. The application can effectively improve the dynamic performance and long-term reliability of the bidirectional device.

The invention discloses a permanent magnet synchronous motor predictive current control method and system, and belongs to the technical field of permanent magnet synchronous motor control. When a torque instruction changes drastically in a medium-high speed range, output voltage saturation is extremely easy to occur in dead-beat predictive current control, so that q-axis current is difficult to excite to an instruction value by the saturated output voltage in a sampling period, and the dynamic performance of torque rise at the medium-high speed is seriously reduced. Therefore, under the condition, the rising speed of the q-axis current is increased through flux weakening operation, and then the operation of increasing the torque is carried out at the higher q-axis current rising speed. The optimal flux-weakening current is determined based on a q-axis current rise time prediction algorithm, so that the total time required by flux-weakening operation and torque rise operation is minimum, and the torque dynamic performance of dead-beat prediction current control under medium and high speeds can be effectively improved.

A method for determining the output rotational speed (nA1, nA2) of the shaft (26) of a machine (27), particularly an internal combustion engine, using a filter, wherein the characteristics of the filter are determined based on the operating characteristics of the machine (27), wherein the characteristics of the filter are the filter length.

The invention relates to a rotary press, comprising: upper and lower punch guides having upper and lower press punches and a rotor of a die plate between the punch guides, the press punches cooperating with the cavities of the die plate; the filling device is used for filling the cavity with powder; the pressure device is provided with an upper pressure unit and a lower pressure unit which cooperate with the pressing punch to press the powder in the cavity into a pressed product; the scraping device is used for scraping the pressed product from the upper side of the mold disc into the first pressed product outlet; and the sorting device is used for sorting the pressed products into the second pressed product outlet. The sorting device comprises a sorting drive and a sorting element which is moved by means of the sorting drive between a sorting position, in which the sorting element is in the transport path of the pressed articles to the first pressed article outlet and guides the pressed articles to the second pressed article outlet, and a rest position, in which the sorting element is in the transport path of the pressed articles to the second pressed article outlet. A magnet driven by a stator of an electric motor converts its driving movement into a driving movement of a sorting element by means of a conversion element.