47results about How to "Reduce longitudinal impact" patented technology

The invention discloses a car bumper provided with an energy absorption and pedestrian protection device. Collision energy is dispersed and consumed by adopting a rhombus-shaped mechanism and a damping unit; and the rhombus-shaped mechanism is used for transmitting energy in a collision process into a transverse direction so as to reduce the vertical impact force between a pedestrian and a car body. Meanwhile, the deformation of the rhombus-shaped mechanism can provide a certain safe buffering distance for the collision process to prolong the collision contact time and reduce the magnitude of collision force. The energy decomposed by the rhombus-shaped mechanism is transmitted to the damping unit, and the kinetic energy is converted into heat energy through the relative movement of the damping unit; and finally, the collision energy is consumed. Therefore, the collision force can be decomposed, the collision energy is consumed, the collision contact time is prolonged, the stress of people and the car in the collision process is improved, and further, the safety of people and the car is protected to the greatest extent.

The invention discloses a pressure regulating method and system for a concrete pumping apparatus, and the concrete pumping apparatus, wherein the system comprises a constant pressure pump, a pressure sensor for acquiring a pumping pressure value and a pumping pressure change rate, a pressure regulating valve connected with the constant pressure pump and used for regulating distributed pressure output by the constant pressure pump, a controller connected between the pressure sensor and the pressure regulating valve and used for receiving the pumping pressure value and the pumping pressure change rate acquired by the pressure sensor and controlling the regulating valve opening of the pressure regulating valve according to the pumping pressure value and the pumping pressure change rate, and an oscillating oil cylinder connected with the constant pressure pump and used for obtaining the distributed pressure output by the constant pressure pump and pressure oil from an accumulator so as toobtain reversing pressure to push a distribution valve. According to the system disclosed by the invention, longitudinal impact on an entire vehicle is greatly reduced during distribution reversing by smartly regulating the distributed pressure output by the constant pressure pump, so that the service life of a hardware device is prolonged, and simultaneously, well energy saving is achieved.

The invention relates to an H infinite robust control method for mode switching of a composite power split hybrid power system, comprising an engine start-up and an engine torque switching phase. In the engine startup phase, the engine torque of the first and second electric machines and the torque change when the first brake is turned on are determined by using dynamic programming and H infiniterobust control method. The output shaft of the engine is accelerated by the power split hybrid system under the premise that the torque at the power output end changes steadily and continuously. Whenthe engine speed reaches the idle speed, the engine ECU issues the fuel injection ignition command, the engine starts to output the torque, completes the engine torque switching, and enters the powersplit hybrid mode. Compared with the prior art, the invention can suppress the torque control error caused by the parameter perturbation and the torque fluctuation of the system in the mode switchingprocess, and realize the optimal comprehensive performance such as the switching time, the smoothness of the mode switching process, the vehicle power performance, the brake sliding friction work andthe like.

The invention relates to a compensated step-less bare weight automatic adjuster of truck with damping vibration attenuation, while the former brake system can not reduce the pressure of brake cylinder significantly. The invention uses the control part 14 and the compensate part 15 of sensing valve to assist the adjusting valve 12 to adjust the pressure of brake cylinder and reduce the pressure of wind cylinder. It can step-less adjust the pressure of brake cylinder from bare weight to heavy weight of truck, without changing the former brake system, to significantly reduce the pressure of brake cylinder. The invention comprises a damping spring recover function, a air damping vibration attenuation, and a brake pressure self-locking weight-detecting restrain disc 17, to completely eliminate the effect on detecting weight by vibration when driving, therefore, the working state of restrain disc and sensing valve will all the same when the truck is braked. The invention can effectively reduce the longitudinal impact and avoid accidence.

The invention provides a railway vehicle and a hook buffer device thereof. While curve pass is realized, a connecting structure is simplified, a fit clearance is reduced, and the fitting tightness between a tail hook pin and a pin hole is improved. The hook buffer device comprises a front slave plate base, a rear slave plate base and a bidirectional buffer, wherein the front slave plate base and the rear slave plate base are connected with a vehicle body; the bidirectional buffer is fixedly connected between the front slave plate base and the rear slave plate base and is provided with a carrying body with a buffering function and a connecting component acting on the carrying body; the connecting component is hinged to a vehicle hook through the tail hook pin; the tail hook pin extends up and down; a rotating component is assembled between at least one of the connecting component and the vehicle hook, and the tail hook pin, so that the connecting component and the vehicle hook relatively rotate in a vertical plane; the rotating component is matched with the connecting component and the vehicle hook, so that relative displacement between the connecting component and the vehicle hook in the front-back direction is limited. Due to the fact that the vehicle hook and the connecting component can be relatively fixed in the front-back direction, no matter in an assembling state or various working states, the longitudinal impact caused in a vehicle driving process can be obviously reduced, the usability of the vehicle is improved, and the abrasion is reduced.

The invention discloses a machine for automatically charging gunpowder into firecrackers. A turntable (16) is arranged on a frame (2); at least one workpiece tray unit (8) is arranged at the periphery of the turntable (16); a feeding station, a gunpowder charging station, a vibrating and residual gunpowder removing station and a discharging station are at least arranged on the frame (2) in sequence; a feeding conveying device and a conveying cylinder are butted with the feeding station; and a discharging conveying device is butted with the discharging station. The machine for automatically charging the gunpowder into the firecrackers is high in production efficiency, safety and measuring accuracy.

The invention provides a manual coupling buffer structure. The manual coupling buffer structure comprises buffers (3), two clamp rings (21) and two traction rods (40). Notch grooves are formed in the clamp rings (21), and connecting necks (42) are formed in one ends of the traction rods (40); and the clamp rings (21) are mutually connected with the connecting necks (42) on the inter-adjacent traction rods (40) in a clamped mode through flange parts located on the two sides of the notch grooves, every two clamp rings (21) are connected in series through connecting bolts (6) and fixedly connected with the traction rods (40) to form a whole body, and the buffers (3) are connected at the free ends of the traction rods (40). By utilizing the manual coupling buffer structure, the longitudinal impact between vehicles can be alleviated, when the mutual coupling state between the vehicles needs to be removed, an operating worker only needs to disassemble the connecting bolts with the help of a simple auxiliary tool, and then disconnection between every two adjacent vehicles can be achieved; and the manual coupling buffer structure has the outstanding advantages that the structure is simple, operation is convenient, the coupling reliability is high and the implementation cost is low.

The invention provides a chassis of a railway bathtub open wagon, relating to a chassis on a railway bathtub open wagon, wherein the chassis provided by the invention is mainly used for solving the defects that the existing chassis cannot meet the use requirements of a macro-axis heavy-railway bathtub open wagon and the end plate of the bathtub is easy to deform and short in service life. The chassis in the invention comprises an end beam assembly, a longitudinal beam, a sleeper beam assembly, a side beam assembly, a bathtub composed of a bottom plate and an end plate, and a box-shaped traction beam composed of an upper cover plate, a web plate and a lower cover plate. The chassis is characterized in that both the tail end of the upper cover plate and the tail end of the web plate are welded with the end plate, wherein the tail end of the web plate is of a section-changing structure with a gradually enlarged section from the outside to the inside. The chassis has the advantages of simple structure, reduced weight of the traction beam, reduced longitudinal impact to the end plate of the bathtub and prolonged service life of the bathtub.

The invention discloses a depressed center flat car for urban rail vehicle maintenance, and relates to the technical field of rail vehicles. The depressed center flat car comprises a chassis, a wind braking device, a manual braking device, an electrical device, a vehicle coupler buffering device and a bogie, wherein the electrical device arranged on the end part of the chassis comprises an illuminating element and a power source of the illuminating element; the chassis comprises an end beam, a sleeper beam, a drawing beam, grids, a floor, a lower cover plate and two opening covers or more; the drawing beam of a knife-holder-type hollow frame structure comprises a dovetailed external end part, a middle part and a bending part; the dovetailed external end part is connected with the vehicle coupler buffering device; the middle part is connected with the sleeper beam; the bending part is connected with the grids; the lower end surface of the middle part is higher than lower end surfaces of the external end part and the bending part; each of the sleeper beam, the drawing beam and the grids is internally and vertically provided with web plates at intervals. The depressed center flat car disclosed by the invention has the advantages that the features of simple structure, convenience in use, large loading capacity, high overall strength, high applicability and the like are obtained; the flat car is suitably applied to the operation on standard gauge lines, and is mainly used for the maintenance of subway rail lines; cargoes loaded by the flat car are equipment mainly used for maintaining the subway rail lines.

The invention discloses a side wall supporting structure and a hopper car. The side wall comprises a connecting beam and two supporting units; each supporting unit comprises a side wall supporting plate and a reinforced beam fixed to one side of the side wall supporting plate; the edge of the side wall supporting plate far away from the reinforced beam is in an arc shape matched with the inside radian of the side wall plate; the reinforced beams of the two supporting units are connected by the connecting beam; and the two side wall supporting plates are spaced by a certain distance. Many defects in the prior art are overcome and the advantages of reducing the self weight and improving the space utilization rate and the reliability are realized.

A wave suppressor for a railroad tanker relates to tankers used for conveying liquids, and is particularly used in the tanker. The wave suppressor comprises swash plates and a mounting seat, wherein the mounting seat is fixed on the inner wall of the tanker; the swash plates are fixed on the mounting seat. The wave suppressor is mainly characterized in that the swash plates are fixed on two sides of the mounting seat at equal intervals in a fence-shaped manner; the middle, in the length direction, of each swash plate is convex to form a cap top; brims are arranged on two sides on the lower edge of the cap top to form a cap-shaped structure. The wave suppressor has the benefits that the cap-shaped structure of the swash plate meets the movement regularity of hydromechanics, so as to reduce longitudinal impact and regurgitation force of a liquid in the tanker effectively, effectively overcome the defects of non-uniform stress on the conventional swash plates suffering from fluid impact and non-uniform overflow, reduce longitudinal impact on a sealing head of the tanker, ensure running safety and prolong the service lives of the swash plates.

The embodiment of the invention discloses a supporting device for tunnel excavation, and relates to the field of tunnel supporting equipment. The supporting device mainly aims to solve the problem that an existing supporting device for tunnel excavation is poor in shock resistance, the supporting device comprises a movable supporting part and a fixed supporting part, and a main body part is arranged in the fixed supporting part; the supporting device further comprises a first buffering mechanism, a second buffering mechanism and a third linkage assembly, the movable supporting part drives a first linkage assembly to slide along the surface of the fixed supporting part through longitudinal movement of a longitudinal movable part, and longitudinal impact force, from an earthquake, borne by the movable supporting part can be weakened; and a guide rail part can drive one end of a linkage part to transversely move along the guide rail part, longitudinal impact force borne by the movable supporting part can be converted into transverse supporting force for the fixed supporting part through the first linkage part, and a transverse moving part drives a second linkage assembly to rotate and slide along the main body part through transverse movement of the transverse moving part, and transverse impact force, from an earthquake, borne by the movable supporting part can be weakened.

The invention relates to the oilfield oil extraction equipment manufacturing technical field, in particular to a ceramic plunger. To overcome the problem of blockage of an oil pump in the prior art caused by the heating and deformation of a metal plunger, the invention provides the ceramic plunger which comprises a top ring, a spacing ring, a ceramic plunger barrel, an oil pumping pipe and a ball valve; one end of the top ring has a sunken conical surface; two ends of the ceramic plunger barrel have protuberant ceramic conical surfaces, two ends of the spacing ring have sunken conical surfaces; one end of the ball valve is fixedly connected with a middle check nut; the other end of the ball valve is provided with a spring seat; the spring seat is provided with a spring seat liner inside; the spring seat is connected with the spring seat liner by a spring seat pin; and a spring is arranged between the spring seat and the spring seat liner. The ceramic plunger lightens the vertical impulsive force when the plunger bumps the pump, eliminates the extrusion to the ceramic plunger barrel when the metal top ring, the spacing ring and the oil pumping pipe are heated and expanded, and protects the ceramic plunger barrel from being broken easily.

A bridge anti-seismic support comprises a beam bottom embedded steel plate and a padstone top surface steel plate, a support upper steel plate is fixedly connected with the beam bottom embedded steel plate through an upper anchor rod, a support lower steel plate is fixedly connected with the padstone top surface steel plate through a lower anchor rod, the support upper steel plate is located on the inner side of the support lower steel plate, and a cavity is defined by the support upper steel plate. The cavity is filled with the transversely-placed middle buffering energy-absorbing block, the support lower steel plate and the support upper steel plate are oppositely arranged in the opposite directions, the side face of the support lower steel plate and the side face of the support upper steel plate are oppositely arranged, and the space between the side face of the support upper steel plate and the side face of the support lower steel plate is vertically filled with the peripheral buffering energy-absorbing block. The buffer energy-absorbing block can effectively prevent rigid damage of seismic waves to the bridge. The bridge anti-seismic support guarantees the stability of a bridge, is safe, reliable, high in buffering capacity and large in absorbed energy, has the advantages of being easy to manufacture and convenient to install, and has high practicability.

The invention relates to the technical field of the drilling device, and especially relates to a drilling device of geological survey. Guide pillars are fixed on an upper surface of a guide pillar fixing plate, a guide sleeve fixing plate is arranged on a back sidewall of a drill body host; a plurality of guide sleeves are arranged on an upper surface of the guide sleeve fixing plate, and each guide sleeve penetrates to a bottom surface of the guide sleeve fixing plate; each guide pillar penetrates the corresponding guide sleeve from bottom to the top; a damping wrapping belt is fixed on a back surface of a fixing plate; horizontal guide rails are arranged at a left sidewall and a right sidewall of the drill body host; a sliding block is embedded on each horizontal guide rail, and a handleis fixed on each sliding block; and a locking positioning mechanism for locking the sliding block on the horizontal guide rail is arranged on each sliding block. When being used, a drilling device structure maximally reduce the labor intensity of a drilling operator in the work, so that the drilling work is more convenient and easier.

The invention discloses a measuring instrument supporting device. The measuring instrument supporting device comprises a bottom plate, a tripod and a supporting plate, wherein a slide slot is formed in the upper end surface of the bottom plate; a plurality of blind holes are formed in the slot bottom of the slide slot; the tripod comprises three telescopic poles; the lower ends of the telescopic poles are hinged with a slide slot; the slide rod is in sliding fit to the slide slot; the lower end of the slide rod is spliced and matched with the blind holes; and length of the slide slot is greater than that of the slide rod. The measuring instrument supporting device is convenient for regulating the horizontal state of the supporting plate, is small in integral size under a storage state, reduces space occupation, and is conveniently carried along with people and a vehicle.

The invention provides a mode prediction method for hybrid electric vehicle power system coordination control. The mode prediction method comprises the following steps that a control strategy model based on model prediction control is established according to the power system configuration of a hybrid electric vehicle; establishing an LSTM neural network prediction model of the vehicle demand torque, the vehicle speed and the battery SOC based on an LSTM neural network; inputting the current driving historical data of the hybrid electric vehicle into an LSTM neural network prediction model, and outputting predicted values of the demand torque, the vehicle speed and the battery SOC of the hybrid electric vehicle after a preset time period through the LSTM neural network prediction model; and the control strategy model judges a mode that the hybrid electric vehicle is about to enter according to the predicted values and controls the hybrid electric vehicle to perform mode switching when the predicted values of the required torque, the vehicle speed and the battery SOC reach mode switching conditions. On the basis of power source coordination control, mode switching can be predicted, mode switching can be conducted in advance, the switching time is prolonged, and therefore the purpose of reducing the impact degree is achieved.

The invention discloses automatic wheel loader hydraulic torque converter control methods, and relates to wheel loader drive system control. A locking control method comprises the steps of (1) having control over the initial state; (2) judging the spading intention of a driver; (3) judging the non-flameout conditions of an engine; (4) judging the feasibility conditions of rotating speed initiative synchronization; (5) judging locking conditions; and (6) transmitting the locking instruction. A non-locking control method comprises the steps of (1) having control over the initial state; (2) prejudging the working conditions of a loader on the next moment; (3) judging the spading intention of a driver and the non-flameout conditions of an engine; and (4) transmitting the non-locking instruction. According to the automatic wheel loader hydraulic torque converter control methods, all the control parameters come from the CAN bus of the loader, hydraulic torque converter locking control can be achieved just by writing a control program in a complete machine controller, no parts are added, and the cost is low; it can be avoided that an engine flames out because of overload in the locking process; longitudinal impact of a complete machine in locking can be reduced, and the comfort of the complete machine is guaranteed; and the misoperation of a driver can be prevented, and it is guaranteed that the loader travels normally.

The invention relates to the technical field of durian picking, and discloses a harvesting device capable of preventing durians from being damaged during picking. An outer-layer funnel is movably connected to the interior of a storage funnel, impact reduction mechanisms are arranged at the two sides of the outer wall of the outer-layer funnel, and each impact reduction mechanism comprises a chuteand a buffer rotating rod; the chutes are formed on the outer wall face of the outer-layer funnel, inner rotating shafts are movably sleeved with the buffer rotating rods, and the two ends of each inner rotating shaft are fixedly connected to the wall faces of the two sides of the corresponding chute. According to the device, the impact reduction mechanisms and longitudinal buffering mechanisms are arranged to be matched with the outer-layer funnel, and a closing baffle is matched, so that the durians can be prevented from falling off from the interior of the outer-layer funnel; and after thedurians fall in placing grooves and can be taken out through a discharging channel, so that the situation that the durians fall to hit collecting personnel can be avoided while the durians are prevented from being damaged during collecting, and the safety of the collecting personnel is improved while the collecting quality of the durians is guaranteed.

A wheelless horizontal landing device comprises a skid structure (1), a skid buffer (2), and a foot pad (3). The upper end of the skid structural member (1) is mounted on the aircraft body structure through a pin shaft, and the bottom end is connected with the foot pad (3) through the pin shaft; One end of the skid buffer (2) is connected with the skid structure (1) and the other end is connectedwith the landing gear of the aircraft; At that time of lan, the skid structure (1) is inclined, the skid buff (2) is cushioned, and braking is realized by relative friction between the foot pad (3) and the runway.

The invention discloses an amphibious environment detection device, which belongs to the technical field of environment detection, solves the problem of narrow application range of the existing environment detection device; and the device comprises a protection shell, a soil detection device, a water quality detection device, walking devices and a servo motor; the soil detection device and the water quality detection device are arranged in the protection shell, the soil detection device and the water quality detection device are connected with a rotating shaft through supports respectively, the two walking devices are symmetrically distributed on the two sides of the protection shell, and each walking device comprises a servo motor, a mounting disc, a fixing column and a supporting leg. The servo motor is connected with a driving shaft through a motor shaft, a fixing disc on the surface of the driving shaft is in threaded connection with a mounting disc, the side wall of the mounting disc is in threaded connection with fixing columns, supporting legs connected to the ends of the fixing columns are in threaded connection with water stirring baffles and rubber blocks, and the six fixing columns are symmetrical about the center of the mounting disc. The device has the advantage of being wide in application range.

The invention relates to the technical field of explosion-proof armored vehicles, and particularly relates to a military vehicle lightning protection seat energy absorption device. The device comprises a fixing mechanism, a guide mechanism, a starting mechanism and an energy absorption mechanism. The fixing mechanism comprises an energy absorption device upper connecting block and a lower connecting block which are connected with corresponding mounting points of upper and lower cross beams of a seat framework through bolts; the guide mechanism comprises an elastic piece mounting block and an external box of the energy absorption device, and the elastic piece mounting block and the external box jointly restrain a motion trail of the energy absorption device in a working process of the energy absorption device; the starting mechanism comprises an elastic sheet and a constraint bolt and is connected with the elastic sheet mounting block; and the energy absorption mechanism comprises a steel belt and a steel belt limiting bolt, and the elastic piece mounting block is connected with a fixing and supporting mechanism after connecting the steel belt through the bolt. According to the lightning protection seat energy absorption device, buffering energy absorption is achieved through plastic deformation generated by the steel belt when the seat is impacted, an explosion impact is reduced, impact energy can be greatly relieved, and protection performance of the seat is effectively improved.

The invention discloses a car bumper provided with an energy absorption and pedestrian protection device. Collision energy is dispersed and consumed by adopting a rhombus-shaped mechanism and a damping unit; and the rhombus-shaped mechanism is used for transmitting energy in a collision process into a transverse direction so as to reduce the vertical impact force between a pedestrian and a car body. Meanwhile, the deformation of the rhombus-shaped mechanism can provide a certain safe buffering distance for the collision process to prolong the collision contact time and reduce the magnitude of collision force. The energy decomposed by the rhombus-shaped mechanism is transmitted to the damping unit, and the kinetic energy is converted into heat energy through the relative movement of the damping unit; and finally, the collision energy is consumed. Therefore, the collision force can be decomposed, the collision energy is consumed, the collision contact time is prolonged, the stress of people and the car in the collision process is improved, and further, the safety of people and the car is protected to the greatest extent.

The invention discloses a goods train brake control system and method with inclination participation, and relates to the technical field of vehicle brake control. The control system comprises a brakesignal sending device used for sending out a brake deceleration instruction and brake force output devices installed on all vehicles, and the brake force output devices of all the vehicles are provided with inclination sensors and can detect the inclination of the vehicles in real time. Each braking force output device is in communication connection with the braking signal sending device, can receive the brake deceleration instruction sent by the brake signal sending device, and can calculate a braking force required by each vehicle in real time according to the brake deceleration instructioninformation and the vehicle inclination information so as to control vehicle braking. By implementing the technical scheme, an influence of a component force of the gravity of each vehicle parallel toa ramp on the braking rate of the vehicle can be eliminated so that the braking deceleration of the vehicle tends to be consistent in real time, and purposes of reducing a longitudinal impact force during train braking and ensuring train operation safety are achieved.

Disclosed are a pressure regulating method and system for a concrete pumping device and a concrete pumping device, wherein the system comprises a constant pressure pump (1), a pressure sensor (2) for acquiring a pumping pressure value and the change of rate in the pumping pressure, a pressure regulating valve (4) connected to the constant pressure pump (1) and for regulating the distributing pressure output by the constant pressure pump (1), a controller (3) connected between the pressure sensor (2) and the pressure regulating valve (4) and for receiving the pumping pressure value and the changing rate in the pumping pressure obtained by the pressure sensor (2) and for controlling the degree of opening of the pressure regulating valve (4) according to the pumping pressure value and the changing rate in the pumping pressure, and an oscillating oil cylinder (6) connected to the constant pressure pump (1) and for obtaining the distributing pressure output by the constant pressure pump (1) and a pressurized oil from an energy reservoir (5) so as to obtain a reversing pressure for urging a distributing valve. The present solution can achieve, by means of intelligently regulating the distributing pressure output by the constant pressure pump, reduced longitudinal impact on the whole vehicle during a distribution reversing, so as to prolong the service life of hardware devices and save energy.

The invention railway vehicle buffer capable of reducing the longitudinal impact of the train comprises a first main buffer cylinder, a second main buffer cylinder, a buffer frame main body, a connecting frame and a nut, wherein the second main buffer cylinder is installed at one end of the first main buffer cylinder, and the buffer frame main body is installed at the end, away from the first mainbuffer cylinder, of the second main buffer cylinder; elastic rubber is installed on the two sides of the interior of the buffering frame body, a first auxiliary buffering cylinder is installed on theouter wall of one side of the buffering frame body, a second auxiliary buffering cylinder is installed at the end, away from the buffering frame body, of the first auxiliary buffering cylinder, and alimiting structure is arranged at the end, away from the first auxiliary buffering cylinder, of the second auxiliary buffering cylinder. According to the buffer, convenience of the buffer during installation and maintenance is enhanced, the buffer performance of the buffer is improved, the function of multi-stage train longitudinal impact reduction of the buffer is achieved, and use cost is reduced.

A lightweight open wagon special for transporting ores comprises a wagon body steel structure, a wagon hook buffer device, a steering frame and a brake device. The wagon body steel structure comprises a bottom frame, lateral walls and an end wall. The bottom frame comprises a tail device mounting seat, an auxiliary crossbeam, an auxiliary longitudinal beam, a sleeper beam, a middle beam, a large crossbeam, a small crossbeam and a steel floor. The bottom frame without an end beam and a lateral beam, the lateral walls and the end wall are connected through integral full-steel welding to form an integral stress frame structure. Slag-preventing plates are disposed at the connection of the end wall and a lateral wall, the connection of the end wall of the bottom frame and the connection of the lateral wall of the bottom frame. The lightweight open wagon has the advantages that the end beam and the lateral beam of the bottom frame of a traditional open wagon are omitted, weight of the open wagon is effectively lowered while load capacity of the same is increased, the main bearing part of the wagon body is made of high-strength weather-resisting steel, strength margin and corrosion resistance of the parts of the open wagon are increased, and the service life of the open wagon is prolonged; wagon hooks conforming to AAR standards and a large-capacity rubber buffer are utilized to effectively increase the impact load bearing capacity of the open wagon.

The invention relates to an H infinite robust control method for mode switching of a composite power split hybrid power system, comprising an engine start-up and an engine torque switching phase. In the engine startup phase, the engine torque of the first and second electric machines and the torque change when the first brake is turned on are determined by using dynamic programming and H infiniterobust control method. The output shaft of the engine is accelerated by the power split hybrid system under the premise that the torque at the power output end changes steadily and continuously. Whenthe engine speed reaches the idle speed, the engine ECU issues the fuel injection ignition command, the engine starts to output the torque, completes the engine torque switching, and enters the powersplit hybrid mode. Compared with the prior art, the invention can suppress the torque control error caused by the parameter perturbation and the torque fluctuation of the system in the mode switchingprocess, and realize the optimal comprehensive performance such as the switching time, the smoothness of the mode switching process, the vehicle power performance, the brake sliding friction work andthe like.

The invention discloses a railway vehicle end structure for tight-lock couplers and end traction and a railway vehicle, the railway vehicle end structure comprises a vehicle body end main bearing structure (1), a coupler box (2) and a traction device mounting seat (3), and the coupler box (2) and the traction device mounting seat (3) are sequentially mounted below the vehicle body end main bearing structure; and the traction device mounting seat is positioned right below the coupler box. The installation and application requirements of the tight-lock coupler buffer device can be met, meanwhile, the requirement that traction force and braking force are transmitted between a vehicle body and a bogie in an end traction mode can be met, the structure is simple, the occupied space for installation is small, and cost is low. The problem that the installation space is limited when the tight-lock coupler and the end traction are used together is effectively solved.

The invention provides a three-direction multi-stage energy absorption device for a railway vehicle and belongs to the technical field of passive safety of rail traffic vehicles. A screw with an anti-creeper penetrates through through-holes of two bosses and an induction ring in the center of a single-hole pushing block. The two ends of four supporting arms are hinged to pushing blocks through bolt pins to form a support of a parallelogram structure. The back end face of each pushing block is provided with a turnup groove and one induction ring and fixedly connected with first energy absorption pipes. The back end face of each pushing block is provided with one turnup groove. Each first energy absorption pipe, each second energy absorption pipe and each third energy absorption pipe are each provided with a cutting head, wherein each cutting head is axially embedded in one end of another energy absorption pipe. Inner rings of the cutting heads are in threaded connection with small endsof cutting shafts combined with the cutting heads correspondingly, cutter mounting seats and W-shaped cutters are arranged at the end faces of the cutting heads, and sharp knives of the W-shaped cutters are located in induction grooves. The cutting shafts are stepped shafts, and the lateral surfaces of the cutting shafts are provided with the induction grooves and threads at intervals. The three-direction multi-stage energy absorption device for the railway vehicle is used for passive safety of the vehicle.