37results about How to "Large parameter range" patented technology

The invention discloses a tri-axial platform servo motor control method based on the combination of a BP neural network and an active disturbance rejection controller. The tri-axial platform servo motor control method includes the following steps that 1, the kinetic equation of a tri-axial platform arbitrary-frame servo system containing a friction model is built; 2,according to the kinetic equation in the formula (I),the active disturbance rejection controller is designed; 3,a BP neural network parameter on-line setting module is designed and combined with the active disturbance rejection controller, and active disturbance rejection controller on-line parameter setting is achieved. By the adoption of the tri-axial platform servo motor control method based on the combination of the BP neural network and the active disturbance rejection controller, a flat top phenomenon and a dead zone phenomenon of a servo system can be basically eliminated, wherein the flat top phenomenon occurs during position signal tracking, and the dead zone phenomenon occurs during speed signal tracking; therefore, the position tracking precision and the speed tracking precision of the servo system can be improved.

The invention relates to a device which is used in the metal structure material rusting away the condition monitor the metal to rust away the monitor optical fiber diffraction grating transmitter, constitutes including the first support abutment, through one to skids in the first support abutment one side along the week skids the joint of casing second support abutment, in should skid on the drive pipe with to wait the monitor metal material to circle the system as soon as to have the compression remainder the spring and the agglutination skid on the drive pipe in the technique, in should skid the drive pipe central shaft position to be gummy as soon as receives the first optical fiber diffraction grating which the spring resiliency stretches, a this first optical fiber diffraction grating light end fixes in on the first support abutment which states and stretches out a free electricity, This optical fiber free electricity connects the first fiberoptic connector; In states the optical fiber free electricity which the second support abutment one side stretches out in addition to connect the second fiberoptic connector. This invention has the simple structure, the easy manufacturing, low cost and good robustness.

The invention relates to a cylindrical cam rotor internal combustion engine power system and belongs to the field of internal combustion engines. In the power system, a cylindrical cam and a plurality of sliding block driven parts are adopted to form a cam mechanism, and the cylindrical cam, the sliding block driven parts, a rotor chamber, a mandrel and end members form a plurality of circumferentially distributed sealed working chambers; the volumes of the sealed working chambers are changed along with relative movement of the sliding blocks and the cylindrical cam; the four processes of air inflowing, compression, acting and exhausting of an otto cycle are finished in the working chambers through cooperation with air valves; and the chemical energy generated by gas combustion is directly converted into fixed-shaft rotation type mechanical energy of the mandrel relative to the rotor chamber. According to the cylindrical cam rotor internal combustion engine power system, high-pressure gas directly acts on the cylindrical cam and the sliding blocks to generate output power, the structure is simple, and the parameter adjustable range is wide. Flexible control is easy to achieve under control of an added sliding block escapement device, even positive and negative rotation can be achieved, and compared with piston internal combustion engine and Wankel rotor internal combustion engine power systems, the cylindrical cam rotor internal combustion engine power system has much more outstanding advantages.

The invention discloses a gear clamp suitable for a roughness profilometer. A gear spindle is connected with a gear through an expanding sleeve, the gear spindle is connected to a retainer of a bead shafting through a short cone, a motor output shaft is connected with the bead shafting through a coupler, a closed-loop system is formed by an AC servo motor and a circular grating for position measurement, and a gear can be controlled by a motor to rotate around the X axis. A linear slip platform can be used in the direction of the Y axis to control the gear to move around the Y axis, so that data of the entire gear surface can be measured by the profilometer. A measured gear is provided with freedom in both directions of the Y and X axes. Combined with the roughness profilometer, all measurement requirements of the gear surface can be met. The designed gear clamp can be matched with different types of the roughness profilometers, and measurement for gear profile deviation, helical deviation, gear pitch deviation and roughness of the gear surface can be completed under the same clamping condition.

The invention discloses a power system of a cam rotor internal combustion engine, belongs to the field of engines, and relates to a rotor internal combustion engine. The power system uses cams and multiple cam driven pieces to form a cam mechanism, and to form multiple sealed working cavities, peripherally distributed, with inner cavity components, outer rotating surface components and end components; the sealed working cavities change the volumes along with relative rotation of the cams and the cam driven pieces to match valves to finish four processes of intake, compression, acting and exhaust of the Otto cycle therein; and chemical energy generated by gas combustion is directly converted to mechanical energy in a rotor fixed-shaft rotating form. The power system discards a crankshaft of a piston engine; high-pressure gas directly pushes rotor fixed shafts to rotate and to output power; the structure is simple; and the parameter adjusting range is wide. The power system is liable to realize flexible control, or even can realize forward and reverse rotation under control of an additional cam driven piece encapement device; and compared with power systems of a piston internal combustion engine and a triangular rotor internal combustion engine, the power system of the cam rotor internal combustion engine has multiple prominent advantages.

The invention discloses a radiator performance wind tunnel test device capable of simulating a multiphase flow air inlet environment, which belongs to the technical field of radiator performance testdevices. The test device provided by the invention comprises a sand and dust generation device, a rain generation device, an upstream section, a radiator, a hot side circulation system, a downstream section, a separation and recovery section, an induced draft fan and a measurement controller. Performance wind tunnel tests of radiators in sand and dust environments with different sand and dust concentrations and different sand grain temperatures, performance wind tunnel tests of radiators in rain environments with different rainfall amounts and different raindrop temperatures and performance wind tunnel tests of radiators in sand and dust and rain composite environments can be carried out, and meanwhile, performance wind tunnel tests of radiators in conventional natural environments can becarried out, so that the applicability is wide; the parameter range of test conditions is large, and the test function is broadened; sand grains and water can be recycled, and the economical efficiency is high; air exhaust is thorough, and feasibility is high; the structure is compact, and the occupied area is saved.

The invention belongs to the field of internal combustion engines, and relates to an inner cavity cam rotor internal combustion engine power system. In the system, a cam mechanism is composed of inner cavity cams and a plurality of sliding block followers installed on central members in a cam cavity in the system, and a plurality of sealed working cavities distributed circumferentially are composed of the inner cavity cams and end members; the cam mechanism and the sealed working cavities change in volumes with the relative rotation of the inner cavity cams and the central members, and are fit to valves to finish four procedures, namely air intake, compression, acting and exhaust of Otto cycle therein; chemical energy generated from gas combustion is directly converted into mechanical energy output in the fixed-axis rotation form of the inner cavity cams or the central members. In the invention, a rotor fixed axis is driven to rotate and output power by high-pressure gas directly; the structure is simple, and the parameter adjustable range is wide. The flexible control is easy to achieve under the control of an additional sliding block escapement device, so that the positive and negative rotation is realized. Compared with piston internal combustion engine and triangular rotor internal combustion engine power systems, the inner cavity cam rotor internal combustion engine power system has many outstanding advantages.

The invention discloses a gear fixture suitable for a roughness profiler. The gear mandrel and the gear are connected through an expansion sleeve, the gear mandrel is connected to the cage of the dense bead shaft system through a short taper, and the output shaft of the motor is through a shaft coupling. The sensor is connected with the dense ball shaft system, and the AC servo motor and the circular grating for position measurement form a closed-loop system. The motor can control the gear to rotate around the X axis. The Y-axis direction uses a linear sliding platform to control the Y-axis movement of the gear, so that the profiler can measure the data of the entire tooth surface. The gear to be tested has two degrees of freedom in the direction of the Y axis and the rotation around the X. Combined with the roughness profiler, it can meet the measurement requirements of all gear tooth surfaces. The designed gear fixture can be used with different types of roughness profilers, and can complete the measurement of gear tooth profile deviation, helix deviation, tooth pitch deviation and tooth surface roughness under the same clamping condition.

The invention provides a build-in dehumifying reheating multiple stage turbine. The steam reheater is set between the adjacent grades in the cylinder of the turbine, leads the new steam from the main steam tube behind the main valve of the turbine to the reheater to heat expansion desiccation and steam and falls its humidity to protect the turbine from the water erosion; the outlet of the reheater connects the sparse liquid expansion box through the sparse box valve and the exhausting aperture of the expansion box connects the condensator. The invention can directly desiccate and reheat the steam between the grades.

The invention discloses an internal combustion engine power system for matching a swing block with an inner cavity cam rotor, belongs to the field of internal combustion engines, and relates to the internal combustion engine power system for matching the swing block with the inner cavity cam rotor. In the power system, the inner cavity cam rotor is used for forming a cam mechanism with multiple swing driven pieces mounted on a center component in a cavity, and is used for forming multiple peripherally distributed sealed working cavities with end components; the sealed working cavities are changeable in volumes along with relative rotation of the inner cavity cam rotor and the center component; valves are arranged in a cooperation mode to finish four processes of intake, compression, acting and exhaust of the Otto cycle therein; and chemical energy generated by gas combustion is directly converted to mechanical energy in a relative fixed shaft rotating mode of the inner cavity cam rotor and the center component. High-pressure gas directly pushes a rotor fixed shaft to rotate and to output power; and the system is simple in structure and wide in parameter adjusting range. Under longitudinal capturing control of additional swing block, the system is liable to realize flexible control; and compared with a triangular rotor internal combustion engine power system, the system has more prominent advantages.

The invention discloses a downburst simulation method. The airflow direction of horizontal incoming air is changed by a diversion piece, the diversion piece can be constantly switched between a vertical state and a horizontal state by control, the horizontal airflow is blown out from a lower end in a longitudinal direction when the diversion piece is in the vertical state, and the horizontal airflow is blown out from an opposite end of a horizontal air inlet. By the downburst simulation method, a large amount of contact surface of the whole simulation device can be fixedly connected with a moving platform, the risk that the simulation device swings during the moving process of the moving platform is reduced, simulation of the simulation device during the moving process can be achieved, andthe safety of equipment is improved.

The invention relates to a device which is used in the metal structure material rusting away the condition monitor the metal to rust away the monitor optical fiber diffraction grating transmitter, constitutes including the first support abutment, through one to skids in the first support abutment one side along the week skids the joint of casing second support abutment, in should skid on the drive pipe with to wait the monitor metal material to circle the system as soon as to have the compression remainder the spring and the agglutination skid on the drive pipe in the technique, in should skid the drive pipe central shaft position to be gummy as soon as receives the first optical fiber diffraction grating which the spring resiliency stretches, a this first optical fiber diffraction grating light end fixes in on the first support abutment which states and stretches out a free electricity, This optical fiber free electricity connects the first fiberoptic connector; In states the optical fiber free electricity which the second support abutment one side stretches out in addition to connect the second fiberoptic connector. This invention has the simple structure, the easy manufacturing, low cost and good robustness.

The invention discloses a radiator performance wind tunnel test device capable of simulating a multiphase flow inlet wind environment, and belongs to the technical field of radiator performance test devices. The test device proposed by the present invention includes a sand dust generating device, a rain generating device, an upstream section, a radiator, a hot side circulation system, a downstream section, a separation and recovery section, an induced draft fan, and a measurement controller. The invention can carry out wind tunnel tests on the performance of radiators in sand-dust environments with different sand-dust concentrations and different sand grain temperatures, wind tunnel tests on the performance of radiators in rain-drenched environments with different amounts of rain and different raindrop temperatures, and the performance of radiators in sand-dust-rain composite environments The wind tunnel test can also be used for conventional natural environment radiator performance wind tunnel tests, with wide applicability; the parameter range of the test conditions is large, which broadens the test function; sand and water can be recycled, and the economy is high; the exhaust is clean , high feasibility; compact structure, saving floor space.

The invention relates to the field of laser surface treatment and thin-film material preparation, especially relates to a method for optimizing transparent conducting thin film performance by utilizing a cooperation of ultrasonic transduction and ultrashort-pulse laser irradiation. The method comprises the steps: a transparent conducting thin film is arranged on the surface of an ultrasonic transducer, the laser irradiation is performed on the transparent conducting thin film, at the same time, the ultrasonic transducer vibrates in a direction vertical to laser irradiation, so that the transparent conducting thin film vibrates in small amplitude and high frequency along the surface in a normal direction, a distance between the thin film surface and a laser focus is periodically changed in a small way, a laser parameter range for optimizing transparent conducting thin film performance is extended, and the surface of the thin film is easy to have an anneal function; the surface of the transparent conducting thin film absorbs laser energy and melts, the energy generated by the vibration can ensure the thin film fusion field to generate a core in solidification process in advance, add crystal cores and refine crystal particles, so that the density of the thin film is increased, the surface microstructure of the thin film is improved, and the thin film performance optimization is realized at last.

The invention discloses an accelerometer which comprises a substrate and an accelerometer body fixed to the substrate. The accelerometer body comprises a plurality of parallel-connection sensing units, wherein each sensing unit comprises a mass block, a first fixed base and a tooth set, two longitudinal ends of the mass blocks are fixedly connected with the substrate through elastic pieces, the elastic pieces are arranged at two longitudinal ends of the mass blocks, the first ends of the mass blocks are fixedly connected with the substrate, the first fixed bases are arranged on transverse side faces of the mass blocks and are fixedly connected with the substrate, the tooth sets are arranged between the first fixed bases and the mass blocks, and each tooth set comprises a plurality of fixed teeth which are fixed to the first fixed bases, extend in the transverse direction and are spaced from one another in the longitudinal direction, and a plurality of movable teeth which are staggered between the fixed teeth and fixed to the mass blocks. Through the parallel connection of the sensing units, the sensitivity and resolution are improved, and the nonlinearity of acceleration full range is improved through capacitance changes of a variable area.

The invention discloses an accelerometer which comprises a substrate and an accelerometer body fixed to the substrate. The accelerometer body comprises a plurality of parallel-connection sensing units, wherein each sensing unit comprises a mass block, a first fixed base and a tooth set, two longitudinal ends of the mass blocks are fixedly connected with the substrate through elastic pieces, the elastic pieces are arranged at two longitudinal ends of the mass blocks, the first ends of the mass blocks are fixedly connected with the substrate, the first fixed bases are arranged on transverse side faces of the mass blocks and are fixedly connected with the substrate, the tooth sets are arranged between the first fixed bases and the mass blocks, and each tooth set comprises a plurality of fixed teeth which are fixed to the first fixed bases, extend in the transverse direction and are spaced from one another in the longitudinal direction, and a plurality of movable teeth which are staggered between the fixed teeth and fixed to the mass blocks. Through the parallel connection of the sensing units, the sensitivity and resolution are improved, and the nonlinearity of acceleration full range is improved through capacitance changes of a variable area.

The invention relates to a swinging block and cam rotor cooperating internal combustion engine power system and belongs to the field of internal combustion engines. In the power system, cam rotors and a plurality of swinging driven parts are adopted to form a cam mechanism, the cam rotors, the swinging driven parts, rotor chambers and end members form a plurality of circumferentially distributed sealed working chambers; the volumes of the sealed working chambers are changed along with rotation of the cam rotors, and the four processes of air inflowing, compression, acting and exhausting of an otto cycle are finished in the working chambers through cooperation with air valves; and chemical energy generated by gas combustion is directly converted into fixed-shaft rotation type mechanical energy of the rotors. According to the swinging block and cam rotor cooperating internal combustion engine power system, planetary motion of Wankel rotors and an inner chamber in a specific shape are not needed, high-pressure gas directly pushes the rotors to perform fixed-shaft rotation and power is output, the structure is simple, and the parameter adjustable range is wide. Flexible control is easy to achieve under control of an added swinging block escapement device, and compared with piston internal combustion engine and Wankel rotor internal combustion engine power systems, the swinging block and cam rotor cooperating internal combustion engine power system has much more outstanding advantages.

The invention provides a method for identifying lonicerae flos and honeysuckle by a chemical oscillation fingerprint technology, which is characterized by comprising the following steps of (1) adding an oscillation system solution into a to-be-detected sample, uniformly mixing, and communicating the obtained mixed solution with an electrochemical workstation through an electrode to obtain a chemical oscillation fingerprint, and (2) carrying out pretreatment and characteristic parameter extraction on the chemical oscillation fingerprint spectrum, and establishing a regression relationship between the characteristic parameters and the content of lonicerae flos and / or honeysuckle in the to-be-detected sample. The method for identifying the lonicerae flos and the honeysuckle by the chemical oscillation fingerprint technology has the advantages of strong characteristics, high sensitivity, large parameter range and the like, and a simple and convenient method is provided for qualitative and quantitative analysis of the lonicerae flos and the honeysuckle; secondly, the sample does not need to be subjected to complex pretreatment during detection, the analysis cost is low, and further popularization and application of the method are facilitated.

The invention belongs to the field of internal combustion engines, and relates to an inner cavity cam rotor internal combustion engine power system. In the system, a cam mechanism is composed of inner cavity cams and a plurality of sliding block followers installed on central members in a cam cavity in the system, and a plurality of sealed working cavities distributed circumferentially are composed of the inner cavity cams and end members; the cam mechanism and the sealed working cavities change in volumes with the relative rotation of the inner cavity cams and the central members, and are fit to valves to finish four procedures, namely air intake, compression, acting and exhaust of Otto cycle therein; chemical energy generated from gas combustion is directly converted into mechanical energy output in the fixed-axis rotation form of the inner cavity cams or the central members. In the invention, a rotor fixed axis is driven to rotate and output power by high-pressure gas directly; the structure is simple, and the parameter adjustable range is wide. The flexible control is easy to achieve under the control of an additional sliding block escapement device, so that the positive and negative rotation is realized. Compared with piston internal combustion engine and triangular rotor internal combustion engine power systems, the inner cavity cam rotor internal combustion engine power system has many outstanding advantages.

The invention discloses an all-coefficient adaptive control method based on a one-order characteristic model. The all-coefficient adaptive control method comprises the following steps: calculating a primary parameter estimation vector theta1(k) of a current cycle according to the formula which is as shown in the description; calculating an estimated parameter vector theta(k) according to the primary parameter estimation vector theta1(k) of the current cycle and an estimated parameter vector theta(k-1) of a previous cycle; carrying out feedback control according to estimated parameters alpha(k) and beta0(k) of the current cycle to obtain a control vector u(k) of the current cycle. The all-coefficient adaptive control method based on the one-order characteristic model is few in parameter, simple in algorithm, large and easily definable in parameter range, high in tracking speed of dynamic gain calculated by parameter estimation values and high in adaption capability.

The invention belongs to the field of design of internal combustion engines and relates to a cam rotor internal combustion engine power system design method, in particular to a cam rotor internal combustion engine design method. In the design method, according to cam lift and size changes, caused by the cam lift, of the contour surface of a cam; other surfaces of the cam are wrapped through the inner surface of an inner cavity rotation surface component, the outer surface of an outer rotation surface component and corresponding end components in a contact sealing mode, and then an unsymmetrical annular gap is formed; the cam is made to do fixed-axis rotation along with one of the inner cavity component and the outer rotation surface component relative to the other one; a set of cam driven parts are mounted on the inner cavity component or the outer rotation surface which is not fixed to the cam. According to the design method, the four classic procedures of the otto cycle are realized through volume change, and the influence on the rotational speed is little. A control system is used in cooperation to realize flexible transformation of various working modes. The adaptability is high. The system is good in designability and especially suitable for being used in cooperation with computers to conduct flexible automatic control.