38results about How to "Improve static performance" patented technology

A method for end-capping polycarbonate resins, comprising the step of processing a mixture comprising a polycarbonate having free hydroxyl-end groups and an end-capping reagent in a melt transesterification reaction to produce a polycarbonate resin, wherein the end-capping reagent comprises a mixture of: (a) at least one species of a symmetrical activated aromatic carbonate, and (b) at least one species of an optionally-substituted phenol, whereby said end-capping reagent reacts with at least some of the free hydroxyl end-groups of the polycarbonate to produce an end-capped polycarbonate resin.

The invention discloses a servo control strategy and system for simultaneously eliminating a counter potential and load torque disturbance. Based on a nominal model of an armature winding, total disturbance of an electrical part is estimated according to voltages externally applied to two ends of an armature and a detection value of an armature current, and the disturbance is offset by a feedforward compensation part; the residual disturbance of the counter potential is eliminated by combining feedback and adjustment of the armature current; an inner ring of the system is built by a combination step of feedforward control for eliminating electrical total disturbance and current feedback control; based on a nominal mode of a transmission system, the total disturbance of a mechanical part is determined according to the armature current and actual rotational speed information, and the disturbance is offset by the feedforward compensation part; by combining feedback and adjustment of the rotational speed, the residual disturbance of the load torque is eliminated; and an outer ring of the system is built by the combination step of feedforward control for eliminating mechanical total disturbance and rotational speed feedback control. By the servo control strategy, the disturbance of two different time scales is eliminated, and the interference resistant capability and the dynamic and static performance of the servo system are greatly improved.

The invention discloses a control parameter optimization method and system through vector time series prediction and the expert fuzzy transformation ratio. The control parameter optimization method and system through vector time series prediction and the expert fuzzy transformation ratio can be applied to the fields such as the field of control, the field of decision making and the field of artificial intelligence. According to the scheme, input which serves as control parameter on-line optimization setting is predicted and is output through a vector time series prediction method according to the states of a control system and output time series, a transformation ratio value of the control parameter on-line optimization setting is predicted through an expert rule table or a fuzzy controller to carry out on-line optimization setting on control parameters, and the control parameter optimization method through vector time series prediction and the expert fuzzy transformation ratio is formed by combining the two points and a classic control method, further, a specific device and a specific connection relation are designed, and the control parameter optimization system through vector time series prediction and the expert fuzzy transformation ratio is formed. According to the control parameter optimization method and system through vector time series prediction and the expert fuzzy transformation ratio, on-line optimization setting can be carried out on the control parameters according to difference between the working environments and uncertainty of the working environments, a control system can deal with various sudden environmental changes, dynamic performance, anti-interference performance and static performance are improved, and the defect of overshoot is overcome.

Robot ranging is an important foundation that a robot senses the environment. Methods used in the industry at the present involve a ranging sensor, binocular vision, laser scanning radar and the like. The ranging sensor is low in cost, but relatively poor in effect; the binocular vision needs a complicated algorithm and a high-performance calculation chip; the laser scanning radar is expensive. Although the ranging sensor is low in cost and relatively poor in effect, sensors with different theories can be complemented one another. Therefore, according to the advantages and the disadvantages of different sensors and the state (the speed size and the distance) of the robot, a value of the current selected proper sensor is decided, so that the relatively good ranging effect can be achieved, namely a robot ranging algorithm based on multi-sensor fusion is achieved; therefore, low-cost and high-performance robot ranging is realized.

The invention discloses a reactor inlet pressure intelligent adjustment system and a control method thereof, the reactor inlet pressure intelligent adjustment system, and the pressure transmitter used to detect the pressure inside the reactor inlet main pipe and feed back the pressure signal to I / V conversion, I / V conversion The pressure signal is transmitted to the intelligent controller, and the intelligent controller outputs the control current signal to the electric / pneumatic converter according to the pressure setting value and the input pressure signal, and the electric / pneumatic converter converts the control current signal into the corresponding air pressure signal, The pneumatic valve realizes the adaptive opening according to the corresponding air pressure signal. The operation is stable and reliable. The adjustment performance of the device is good, and various performances such as response time, overshoot, oscillation times, and adjustment time all meet the requirements, and the anti-disturbance ability is obviously improved.

The invention relates to a control system of an opening-closing die motor and a push-out motor of a fully-electric injection molding machine, comprising a computer controller, a PLC (Programmable Logic Controller), an opening-closing die push-out driver, the opening-closing die motor and the push-out motor which are mutually connected. The invention also analyzes the motion characteristics and the dynamic characteristics of a toggle lever mechanism of a five-hinge die-closing double-toggle die closing mechanism object, provides a die protection implementation method of a die closing mechanismunder the driving of a fully-electric motor as well as a die closing mechanism control method and a field oriented control algorithm on the basis of a fuzzy adaptive theory from the angle of a control theory, meets the control requirements on three aspects of the die closing force, the speed, and the position, ensures the reliable closing of the molded die and realizes the opening-closing motion of the die and accurate and stably push-out of products from the die; and the designed DSP (Data Signal Processing) driver ensures that the system has stable reliability under the condition of high load and simultaneously improves the disturbance compensation.

The invention discloses a control parameter setting method of a speed regulating controller in a speed regulating device of a torque motor; a speed regulating device on which the method is based is composed of a speed regulating order generator, a speed regulating controller, a power driving module, a speed regulating executing mechanism and a speed sensor; the setting method comprises the steps of forming a parameter identifying device of the speed regulating executing mechanism; according to a phase step output response feature of the speed regulating executing mechanism, identifying an equivalent viscous damping coefficient and an equivalent inertia of the speed regulating executing mechanism, dividing the maximal output voltage of the power driving module by the maximal value of a speed regulating order, squaring the obtained quotient, multiplying by 5 times and dividing by the equivalent inertia to obtain an integral coefficient of the speed regulating controller; multiplying the equivalent inertia by the integral coefficient of the speed regulating controller and calculating a square root, multiplying by twice, and subtracting the equivalent viscous damping coefficient from the obtained product to obtain a probability distribution function (PDF) coefficient of the speed regulating controller. According to the control parameter setting method, the controlling parameter of the speed regulating controller is precisely set, and the speed of the torque motor is stably regulated within a wide range.

The invention discloses a suppression method of relative intensity noise of a light source of a fiber-optic gyroscope. The suppression method comprises the following steps that: reference light which is lead out from an optical fiber dead head of a fiber-optic gyroscope coupler and has light source light-intensity variation information is received by a photoelectric detector to obtain a reference signal; the reference signal is processed by a signal processing module to generate a light intensity modulation control signal; light intensity modulation is performed on a fiber-optic gyroscope signal returned from a fiber-optic ring through a light intensity modulator; light intensity variation caused by the relative intensity noise of the light source is compensated; fiber-optic gyroscope signal light modulated by the light intensity is detected through another photoelectric detector; and the fiber-optic gyroscope signal light is modulated through the signal processing module to obtain the output of the fiber-optic gyroscope of which the relative intensity noise of the light source is suppressed. With the adoption of the suppression method of the relative intensity noise of the light source of the fiber-optic gyroscope, influence of the relative intensity noise of the light source, on the output of the fiber-optic gyroscope, can be effectively suppressed, and the static property of the fiber-optic gyroscope is improved.