134results about How to "In line with actual working conditions" patented technology

The invention provides an accurate and convenient method for measuring storage battery residual capacity SOC. The method comprises the steps that a. initial residual capacity SOC<0> of a storage battery is determined; b. working current of the storage battery in the working time is measured in real time; c. residual capacity SOC(t) of the storage battery after continuous working time t is calculated according to the formula 1 (which is expressed in the specification), wherein eta<age> refers to the attenuation coefficient of the storage battery, C<n> refers to the rated capacity of the storage battery, eta<e> refers to the current efficiency coefficient, eta refers to the correction coefficient of the actual capacity of the storage battery, and t refers to continuous working time of the storage battery; and d. after the end of working of the storage battery, eta=1, and the SOC value calculated according to the formula 1 is the SOC value after the end of working of the storage battery of the time, wherein eta<age> refers to the specific value of the actual capacity to the rated capacity of the storage battery after N times of cyclic charge and discharge of the storage battery, C<n> refers to the electric energy which can be discharged by charging to cut-off voltage, eta<e> refers to the specific value of actual current used for electrode reaction to external current in charge and discharge of the storage battery, and eta refers to the specific value of actual capacity which can be charged or discharged by the storage battery to the rated capacity under the actual use state.

The invention relates to a method for regulating power of a direct-drive permanent-magnet synchronous wind generator set, which comprises the following steps of: A. acquiring the actual speed n of the generator; B. when n is less than the rated speed, executing step C, else, executing step D; C. computing the current torque given value M of the generator set, wherein when M is not greater than the rated torque, outputting M to the wind generator set, else, assigning M to the rated torque value and outputting M; D. acquiring the last M, wherein when M is smaller than the rated torque, executing step E, and when M reaches the rated torque, executing step F; E. gradually regulating the torque to the rated torque, and keeping the rotation speed at the rated speed; and F. regulating the generator set at the rated speed by using a pitch control system. The invention takes the actual air density of the wind field into account, introduces the optimal power regulation coefficient, simplifies the implementation procedure, conforms to the actual working conditions and realizes the real-time optimum efficiency of the power regulation for the wind generator set in the whole process, thereby overcoming the insufficiencies in the prior regulation method.

The invention belongs to the field of numerically-controlled machine tool life prediction and particularly discloses a numerically-controlled machine tool residual life real-time prediction method. The numerically-controlled machine tool residual life real-time prediction method comprises the following steps that a sensor signal during machining of a numerically-controlled machine tool is acquiredin real time and is preprocessed; the machining working condition is judged according to preprocessed signal data, and the machining process is divided into working subintervals according to different machining situations; tool damages produced in the working subintervals are accumulated to obtain accumulated tool damage indexes; real-time prediction of the residual life of a tool under the target working condition is achieved according to the accumulated tool damage indexes. The numerically-controlled machine tool residual life real-time prediction method does not need additional experimental platform erection and tool dismounting, does not affect normal machining of numerically-controlled machine tools, can achieve real-time prediction of the residual life of the numerically-controlledmachine tools and has the advantages of high prediction speed and accuracy rate.

The invention discloses a durability testing machine for an automotive accelerator pedal, which comprises a temperature and humidity test chamber, a mechanical transmission device and a test and control system, wherein the mechanical transmission device comprises a mechanical portion and a power portion; the mechanical portion is arranged in the temperature and humidity test chamber and is driven by the power portion; the mechanical portion includes a support, a main rotation shaft arranged on the upper end of the support, a salve rotation shaft arranged on the lower end of the support, and a parallel connection rod arranged on the main rotation shaft and the slave rotation shaft; a plurality of rockers with rollers are respectively arranged on the main rotation shaft and the slave rotation shaft; the test and control system is divided into a control system and a test system; the control system adopts PLC for transmitting program and sending a switcher instruction to control a stem motor to rotate; and an angle encoder is used for detecting the steering position of the rotation shaft. The invention can drive FPM to move back and forth under a certain environment condition to detect the durability of the FPM.

The invention relates to an electric spindle reliability test bed with a hydraulic-type energy recovery function. The test bed comprises an electric spindle, an electric spindle support portion, a loading bar, a bearing loading unit, a radial force loading portion, an axial force loading portion, an automatic control portion, a torque loading portion and a hydraulic oil way portion. The electric spindle, the loading bar, the bearing loading unit and a shaft axis of a hydraulic pump are coaxial. A loading rod 1 of the radial force loading portion is perpendicular to a shaft axis of the bearing loading unit. The axis of a loading rod 2 of the axial force loading portion is parallel to the shaft axis of the bearing loading unit. The electric spindle is in shaft connection with a hydraulic pump of the torque loading portion through a loading rod 3 and an elastic coupler. According to the arrangement, by subjecting the hydraulic pump and an energy storage to loading, the torque loading is performed on the electric spindle; besides, axial and radial force loading is performed to the electric spindle by the aid of hydraulic oil generated from the hydraulic pump through a hydraulic cylinder, so that the energy is recycled and saved.

The invention relates to a natural gas hydrate production monitoring simulation device and method. The natural gas hydrate production monitoring simulation device is characterized by comprising a hydrate reservoir forming subsystem for simulating the hydrate forming process, a producing well simulation subsystem for simulating the hydrate production process, a monitoring well simulation subsystemfor simulating the hydrate production monitoring process, a product collecting subsystem for conducting collecting treatment on products and a data processing and controlling subsystem for conductingdata collection and centralized control on the subsystems. According to the natural gas hydrate production monitoring simulation device and method, the processes of natural gas hydrate reservoir forming, hydrate production and monitoring and produced gas collection treatment can be simulated, real simulation of a hydrate in-situ environment is conducted, formation state change under various production methods is monitored by adopting a double-shaft monitoring mode, the experimental operation process of the natural gas hydrate production monitoring simulation device is simple, the safety is high, and experiments can be conducted repeatedly.

The invention relates to a strain type lateral expansion force testing device and a measuring method. The strain type lateral expansion force testing device comprises a measuring device, a data collecting device and a loading device. The measuring method comprises the following steps of performing water soaking expansion testing on specimens with same initial wet density states under non-load andnon-lateral strain conditions, and obtaining the expansion limit water content and corresponding dry density of the specimens with same initial wet density states under the condition of stable expansion; performing gradual loading type cementing testing on the specimens with same initial wet density states under the conditions of expansion limit water content and corresponding dry density, measuring the lateral pressure coefficient K0 at different dry densities, and stripping the lateral expansion force from the lateral resultant force. The strain type lateral expansion force testing device and the measuring method have the advantages that the testing method and the device are simple, the operation is convenient, the structure is reasonable, and the manufacturing cost is economical; the problem of stability of expanded soil edge slope after wetting expansion in the long-time expected precise evaluation process of the field is solved, the important design parameters are provided for thedesign of engineering structures and wall back buffer layers in the expanded soil area, and the device and the method are suitable for being popularized and applied in engineering.

The invention provides a comprehensive energy system multi-objective optimization scheduling method considering the human body comfort, and the method comprises the steps: considering the comfort of auser in the optimization scheduling of the comprehensive energy system, building a PMV model according to the perception of a human body for heat, and describing the feeling of the user for heat supply; describing the dissatisfaction degree of the user to the heat supply by predicting the dissatisfaction degree PPD, and determining the value range of the PMV by setting the PDD; and establishing aheating load model and various energy equipment models of the comprehensive energy system; setting constraint conditions, wherein the constraint conditions include a user comfort degree constraint, an energy balance constraint, an equipment output constraint, an electricity purchasing power constraint and a storage battery constraint; establishing a multi-objective optimization model by adoptinga hierarchical sequence method in consideration of various indexes such as cost, carbon emission and primary energy utilization rate; and finally, solving the established optimal scheduling model based on software to obtain an optimal scheduling result of the system and each objective function value. Example analysis verifies the effectiveness of the method in optimal scheduling of the comprehensive energy system.

The invention relates to the technical field of tunnel engineering, and particularly relates to a test device and a test method for testing the waterproof performance of pipe segment joint sealing gaskets. The test device of the invention includes a sleeve with openings at both ends, and sealing covers installed at the two ends of the sleeve. The sleeve includes a plurality of sleeve blocks, and the sleeve blocks are spliced into an overall sleeve structure. Sealing gaskets are installed on the sleeve blocks on the two sides of a joint, and sealing gaskets are also arranged in the positions ofthe sleeve where the sealing covers are installed. The test device can simulate the actual condition that there are various types of joints after pipe segment splicing in actual projects. The experimental data of the waterproof performance of sealing gaskets is consistent with reality. Reliable reference and data support are provided for the construction of actual projects. The construction quality and the waterproof safety are ensured.

The invention discloses an experimental method and an experimental system of gas sealing performance of an underground packer, which can be used for verifying the gas sealing performance of an underground gas injecting packer. The experimental method is to mount an experimental simulation packer in a high-pressure cylinder; the high-pressure cylinder is positioned in a constant-temperature box; and the high-pressure cylinder and the constant-temperature box are connected with a sealing performance experimental system through a pressure test pipeline, a sealing pipeline and a gas leakage collecting pipeline for verifying the sealing performance of the experimental simulation packer in the high-pressure cylinder. The experimental system comprises a high-pressure gas source generation device, a leaked gas metering device and a control device; the pressure test pipeline and the sealing pipeline are both connected with the high-pressure gas source generation device; the gas leakage collecting pipeline is connected with the leaked gas metering device; the control device is respectively connected with a pressure sensor, a temperature sensor and a liquid level sensor through data wires; the experimental simulation packer is sealed by the high-pressure gas source generation device, and an actual underground high-pressure gas injecting environment can be simulated; and the result accords with the actual working condition better.

The invention provides a risk assessment method for relative lightning parameters of distribution network lines, which relates to the lightning protection technical field of distribution network overhead lines of power system. A lightning activity parameter such as a relative value of that lightning flash density is introduced, The relative value of lightning current amplitude induced overvoltagedegree is used to comprehensively evaluate the tower risk level in a particular distribution network, and the towers with relatively high lightning risk level in a particular distribution network areaccurately found out for protection, in order to meet the differential lightning disaster control objectives of distribution network in different areas.

The invention discloses a reliability test system for a test wheel. The reliability test system comprises a test platform, a test wheel support assembly and an axial load loading unit, wherein the test wheel support assembly is arranged on the test platform and includes a support base used for supporting and placing the test wheel, and the axial load loading unit loads an axial load set along theaxial direction of the test wheel to the support base so as to transmit the axial load to the test wheel. The reliability test system disclosed by the invention realizes the simulated loading of the axial load for the test wheel through setting the axial load loading unit, and the application effect of the axial load is closer to the actual stress state, thereby realizing a more comprehensive andmore practical test for the test wheel.

The invention discloses a method for monitoring the electric arc length through electric arc voltage signals. According to the method for monitoring the electric arc length through the electric arc voltage signals, by means of real-time detection of electric arc voltage signal waveforms in the process of welding or additive manufacturing of an electric arc, an electric arc voltage time-domain signal waveform higher than an electric arc voltage threshold value is extracted, so as to obtain an electric arc voltage time-domain feature waveform, noise elimination is conducted on the electric arc voltage time-domain feature waveform through wavelet analysis, low-frequency components of the electric arc voltage time-domain feature waveform are extracted through wavelet packet analysis, an electric arc voltage signal low-frequency component feature waveform graph is drawn, the electric arc voltage signal low-frequency component feature waveform is substituted into an electric arc length mathematical model, an electric arc length change time-domain waveform in the machining process is obtained through calculation, and the electric arc length at any machining moment in the machining process can be obtained through the electric arc length change time-domain waveform. By the adoption of the method for monitoring the electric arc length through the electric arc voltage signals, offline detection and online monitoring of the electric arc length in the electric arc welding processes of TIG, MIG, MAG, PAW and the like and in the metal material electric arc additive manufacturing process can be achieved.

The invention discloses a method for predicting fatigue life of a rotor pigeon tail part of a pumped storage power generation motor based on a Corten-Dolan rule. The method comprises the steps of: according to rotor speed curves provided by a pumped storage power plant under different actual operation conditions, obtaining acceleration distributions as loads, and obtaining the time-varying stress distribution situations caused by centrifugal forces of the rotor pigeon tail part of a power generation motor under a power generation starting condition, a power generation shutdown condition, an electric starting condition, an electric shutdown condition, a load shedding condition and a runaway speed operating condition; according to a maximum value of total stresses under various conditions, determining a stress maximum value under occurred conditions in combination with the occurred conditions in the known running time m years, and solving the available times of the fatigue life of the rotor pigeon tail part of a motor under the single action of the conditions; according to a Corten-Dolan rule calculation formula, obtaining a life prediction coefficient in combination with the actual number of occurrence of various conditions of a power generation motor which has been run for m years; and calculating and obtaining the use period of the fatigue life of the rotor pigeon tail part of the power generation motor according to the life prediction coefficient and the year m.

The invention discloses a method for improving a milling stability domain of a titanium alloy thin-walled workpiece. The method comprises the following steps: step 1, establishing a kinetic equivalentmodel of a rotary ultrasonic milling system of the titanium alloy web thin-walled workpiece; step 2, determining modal characteristics of the milling system for the weak-rigidity titanium alloy thin-walled workpiece; 3, establishing a rotary ultrasonic milling dynamic milling force model; step 4, constructing a rotary ultrasonic milling titanium alloy web thin-wall part stability domain analytical model; 5, solving the stability domain of the rotary ultrasonic milling titanium alloy thin-walled workpiece by using a semi-discrete method; and step 6, drawing a stability lobe diagram of the rotary ultrasonic milling titanium alloy thin-walled workpiece to realize accurate prediction of the stability domain of the titanium alloy thin-walled workpiece. According to the method, the titanium alloy thin-wall part is milled through the rotary ultrasonic technology, the stability range of milling of the titanium alloy web is greatly improved, milling flutter is obviously restrained, and the milling quality of the titanium alloy web is effectively improved.

The invention relates to an ageing test device for PE pipes under fluctuating pressure. A pressure supply device provides gas load of a whole pipe, air pressure in the pipe is adjusted by combined action of a pressure sensor, an electric control valve and a central controller, a pressure injecting and relief process is repeated to form fatigue circulating load, a test pipe section is aged by an ageing device, by the device, research on existing single-factor ageing is changed, various environmental stresses are combined together, and therefore, a laboratory environment which simulates actual working conditions of an urban natural gas pipe is formed. The invention further relates to a lifetime prediction method for the PE pipes under fluctuating pressure. An aged pipe sample is taken out after a specific period, test on mechanical properties and physical and chemical properties is carried out to obtain related data, and change of ageing properties of optional environment temperatures and optional pipes is measured. Compared with an existing method, the lifetime prediction method has the advantages of simplicity, high efficiency and low cost.

The invention discloses a high-precision positioning motion planning algorithm based on damping attenuation. The high-precision positioning motion planning algorithm comprises the steps of: S1, parameterizing a motion planning curve, and acquiring acceleration curve intervals corresponding to intervals with jerk not equal to 0 in the motion planning curve; S2, extracting acceleration input signals corresponding to the acceleration curve intervals in the step S1; S3, acquiring amplitude values in the time domain of displacement output response corresponding to the acceleration input signals in the step S2 through a transfer function of a motion system; S4, establishing an optimization model; S5, and acquiring an optimal motion planning curve according to the optimal value of motion planning curve parameters obtained in the step S4. The high-precision positioning motion planning algorithm can be used for processing acceleration variation signals in a motion constraint function independently, utilizing the superposition property of a linear system to obtain the amplitude values of displacement time domain response corresponding to the acceleration input signals, regarding a sum of absolute values of the amplitude values after damping attenuation as a constraint condition and reducing calculation workload during the optimization analysis process, and can be effectively applied to the S-shape motion planning curve.

The invention discloses a system for testing an electromagnetic valve of an automatic transmission. The system is characterized in that an electromagnetic valve to be tested and a reference electromagnetic valve are arranged in a main oil passage of supplying oil by an oil pump in parallel; an electric control detection driving instrument for the electromagnetic valve of the automatic transmission is arranged according to requirements for actions of the electromagnetic valve in actual working of a vehicle; the electromagnetic valve to be tested and the reference electromagnetic valve are driven by the electric control detection driving instrument for the electromagnetic valve of the automatic transmission; engine oil pressure signals after flowing through the electromagnetic valve to be tested and the reference electromagnetic valve are respectively collected by a signal collecting device dSPACE (DSpace) from a valve pressure sensor to be tested and a reference valve pressure sensor and are real-time displayed; and engine oil pressure signals tested by the valve pressure sensor to be tested and the reference valve pressure sensor are used as a basis for judging whether the electromagnetic valve to be tested is available or not. By using the system disclosed by the invention, whether the performance of the electromagnetic valve applied to the automatic transmission is in compliance with requirements or not can be accurately tested.

The invention relates to an ammonia recovering process and ammonia recovering equipment, namely a method and a device for recovering ammonia from gas from ammonia production plants at a low temperature and isobaric pressure. Several or all coolers of the isobaric ammonia recovering device cool ammonia water and absorb water used by ammonia by using liquid ammonia of which the temperature is lower than that of cooling water. The coolers include a double-travel internal cooler in a bubbling absorber, a coil tube type cooler, an out-tower ammonia water cooler, a demineralized water cooler, a first out-tower small ammonia water cooler, a second out-tower small ammonia water cooler. In the invention, ammonia water is cooled without using cooling water, and power is saved; the cooling area of the out-tower ammonia water coolers and the cooling area of the coolers on all layers of tower plates increase gradually from top down and are allocated according to different ammonia absorbing capacities and different dissolution heat released on all layers of tower plates and the cooler loads on the coolers on the layers of tower plates; and thus, the required cooling area is guaranteed and does not wasted, and the ammonia absorbing capacities on all layers of tower plates are fully played.

The invention relates to an electric and thermal combined aging test method and system of a large power thyristor. The method comprises that test data processed by group is obtained according to a thyristor electric and thermal combined aging test; relation between the service life and influential factors of the thyristor under a constant stress is calculated according to the test data processed by group; and influential factors of the service life of the thyristor under the single constant stress are determined according to the relation. Thus, influence of certain factor on the service life of the thyristor can be obtained from a test result, the service life of the thyristor is evaluated, the thyristor as key component can be more reliable, the service life of a converter valve can be optimized and designed, safe and reliable operation of the converter valve is ensured, the using requirement for increasingly large power transmission capacity can be met, and the engineering application value is high.

The invention discloses a method for predicting accumulative fatigue life of a rotor pigeon tail part of a pumped storage power generation motor based on a Miner rule. The method comprises the steps of: according to rotor speed curves provided by a pumped storage power plant under different actual operation conditions, obtaining acceleration distribution as loads, and obtaining the time-varying stress distribution situations caused by centrifugal forces of the rotor pigeon tail part of a power generation motor under a power generation starting condition, a power generation shutdown condition, an electric starting condition, an electric shutdown condition, a load shedding condition and a runaway speed operating condition; carrying out vector summation on motor temperature variations caused by an electromagnetic loss and stress distributions caused by the generated thermal stress and the centrifugal forces to obtain total stress distributions; and introducing the actual number of occurrence of various conditions of a power generation motor which has been run for m years and the number of use of the fatigue life of the power generation motor under various conditions into a Miner rule calculation formula, and calculating and obtaining the use period of the fatigue life of the rotor pigeon tail part of the power generation motor according to a life prediction coefficient and the actual running years m.

Disclosed is a pumped storage power generation motor rotor pigeon tail accumulated fatigue life predicting method based on a Grover-Manson rule. The method includes: acquiring acceleration distribution as a load according to a rotor speed curve under actual running conditions provided by a pumped storage power plant, and respectively acquiring distribution conditions of stress along with time caused by centrifugal force of a power generation motor rotor pigeon tail in power generation starting condition, power generation stopping condition, motor starting condition, motor stopping condition, load shedding condition and runaway operating condition through dynamic computation; drawing a stress-time curve of a position most prone to fatigue damage in different working conditions, and calculating usable fatigue life times of the position; substituting actual occurrence times of various working conditions of a power generation motor already running for m years and fatigue life using times in the working conditions into a Grover-Manson rule calculation formula, respectively considering fatigue crack formation and fatigue crack expansion, and calculating according to crack formation and expansion to acquire fatigue life of the power generation motor rotor pigeon tail.

The invention discloses a model-free self-adaptive control method for a water well drilling rig propelling device and system. According to the system, a hydraulic oil cylinder serves as the propellingdevice, and displacement of a hydraulic oil cylinder piston is obtained through a displacement sensor; a state-space equation of the well drilling rig propelling system is established; the tight format dynamic linearization processing is carried out to obtain a data model; a pseudo partial derivative estimation rule is calculated; a model-free adaptive controller is designed; the output of the controller is applied to a load-sensitive proportional valve, the displacement of the hydraulic oil cylinder piston can be adjusted by adjusting the opening degree of a valve port of the load-sensitiveproportional valve, and output propelling force is provided for a drilling rig. The method and the system aim at characteristics of multiple parameters and strong coupling of the hydraulic system of the water well drilling rig, the complex nonlinear dynamic characteristics of the propelling system are considered, the model-free adaptive control method is adopted, and the design of the controller can be completed only by utilizing online and offline data. The method has strong anti-interference performance and robustness, and has better adaptability to uncertain working conditions of the waterwell drilling rig.

The invention relates to a non-contact heating temperature controller performance testing device, which is capable of well solving the problems affecting the accuracy of tests in the prior art. The key points of the technical scheme are as follows: the device comprises a temperature controller heating testing system for performing sample testing heating, a cooling system for cooling the temperature controller heating testing system, a subordinate control system for directly controlling the temperature controller heating testing system and the cooling system, a test data system for collecting test data and a host control system; the data testing end of the temperature controller heating testing system and the data testing end of the cooling system both are electrically connected to the test data system; an output end of the test data system is electrically connected to the host control system; an output end of the host control system is electrically connected to an input end of the subordinate control system; and an output end of the subordinate control system is electrically connected to control ends of the temperature controller heating testing system and the cooling system, respectively. The non-contact heating temperature controller performance testing device is quite accurate in test detection.