46results about How to "Improved stability control" patented technology

A running stability control device for a vehicle capable of controlling a steering angle of steered vehicle wheels independently of a steering operation by a driver, and a driving/braking force applied to each vehicle wheel computes a target turn running control quantity of the vehicle, and shares the target turn running control quantity into a first part for the steering angle control and a second part for the driving/braking force control according to a sharing ratio, wherein the sharing ratio is variably changed according to a running condition of the vehicle relative to a road.

The invention relates to a crop rhizospheric soil conditioning system and a conditioning method thereof, in particular to a greenhouse soil water, fertility, air and heat conditioning system and a conditioning method thereof. The crop rhizospheric soil conditioning system comprises a fertilizer irrigating device, a water irrigating device and a temperature-regulating and air-ventilating device, wherein the fertilizer irrigating device comprises a fertilizer storing device and a fertilizer conveying device which are mutually connected; the water irrigating device comprises a water storing device and a water conveying device which are mutually connected; the temperature-regulating and air-ventilating device comprises a fan and an air conveying device; the fertilizer conveying device, the water conveying device and the air conveying device share a main conveying pipeline and a branched conveying pipeline; and the branched conveying pipeline is connected with the main conveying pipeline. The crop rhizospheric soil conditioning system comprehensively condition water, fertility, air and heat of soil through a simple structure and can perform a highly stable control on optimal conditions for crop growth, particularly crop rhizospheric growth; a novel soil non-tillage technology is provided, with significant effects of energy conservation and environment friendliness; and the crop rhizospheric soil conditioning system and the conditioning method thereof are suitable for popularization and application in the field of planting and cultivation of relevant crops.

The invention proposes a method for regulating a stability control system of a vehicle based on the forces acting at the center of each wheel of the vehicle. The actions of the driver, i.e. steering, acceleration or braking, produce forces (changes in forces) are transmitted by the tires to the ground. Control of the operating means of the vehicle (active anti-roll device, engine torque, braking torque, load per wheel or direction) utilizes instructions resulting from the actions of the driver to apply forces. The invention proposes a method of expressing, in terms of forces, the inputs of the driver as a function of the inertia of the vehicle body, velocity of forward movement of the vehicle, and angle at the steering wheel (steering wheel velocity and steering wheel acceleration). If the actual forces that are measured do not correspond to the forces desired by the driver, the active system compensates for this difference by acting on the force distributions in the chassis.

The invention discloses a bidirectional photonic radio frequency transmission system for self-heterodyne coherent detection and a signal processing implementation method thereof. The transmission system comprises a CW laser, a downlink and an uplink, and key signals are mainly processed by adopting a high-frequency orthogonal MQAM-OFDM transmitter in the uplink and the downlink. The system and the method provide an efficient solution for future ultrahigh-speed coherent optical communication, photonic radio frequency fusion communication, ultrahigh-speed multi-channel MIMO wireless transmission and high-speed photonic radio frequency interconnection between base stations.

An all-composite assembly such as a composite laminate aircraft empennage has vertical and horizontal stabilizers with differing sets of interlaminar fracture toughnesses and differing stiffnesses to improve flight characteristics. Composite laminate skins are bonded to unitized and stiffened understructure to reduce weight and improve damage containment.

In a control of a vehicular automatic transmission, an engaging device provided in a power transmission path between an engine and driving wheels is brought into a slipping state or a release state when a certain neutral control condition is satisfied while a shift lever is placed in a running position, the engaging device is engaged so as to increase a torque transmission capacity thereof when a certain neutral control cancellation condition is satisfied during neutral control under which the engaging device is in the slipping state or the release state, and an engaging pressure of the engaging device is held at a constant pressure level for a given period of time when an accelerator pedal is depressed while the engaging device is engaged so as to increase the torque transmission capacity thereof.

The invention provides an inertia rate composite stable control system, wherein a servo controller is electrically connected with a servo turntable, the bottom seat of the servo turntable is connected on a base platform, a turning direction of the servo turntable is parallel to a sensing shaft of a first angle rate gyroscope and a sensing shaft of a second angel rate gyroscope; the first angle rate gyroscope is arranged on the base platform, and is used for generating a disturbing signal of the base platform and outputting a feedforward stable control signal; a speed measurement machine is connected with a rotating shaft of a motor through a connecting shaft; the speed measurement machine is used for obtaining a motor rotating angular speed signal; the second angle rate gyroscope is arranged on load and is used for obtaining an angular rate signal of the servo turntable to achieve a feedback stable loop; the servo controller receives and utilizes a speed given signal, a top feedback signal, a top angular rate feedforward signal and a speed measurement signal of the speed measurement machine to achieve a speed control loop, the feedback stable loop, feedforward stable control, to generate a speed output control signal, to output the speed output control signal to the motor, and to achieve closed-loop control.

The invention relates to an electric vehicle attachment stability and quasi-optimal slip rate detection method. The electric vehicle attachment stability and quasi-optimal slip rate detection method is used for detecting the attachment stability, the quasi-optimal slip rate and the quasi-optimal attachment torque of a vehicle, and is applicable to electrically driven vehicles. According to the method, the traction motor torque T and a wheel speed omega are utilized to observe the tire-ground attachment torque T<d> through a load disturbance observer, the traction motor torque variation delta Tand the attachment torque variation delta T<d> are utilized to calculate an attachment stability factor delta, and the quasi-optimal slip rate lambda<opt> and the quasi-optimal attachment torque T<dmax> are identified according to the drastic change in the value of the attachment stability factor. The electric vehicle attachment stability and quasi-optimal slip rate detection method is easy to implement and high in reliability, and can be widely applied to the traction/braking anti-slip control process of electric vehicles.

In a vehicle suspension assembly a sensorized system applied to a wheel hub unit, in which radially outer cylindrical surface of an outer ring of the wheel hub unit configured for coupling to a suspension upright or knuckle has four circumferential flats formed to be angularly spaced from each other on the radially outer lateral cylindrical surface, each flat delimiting a plane surface which extends axially over a pair of annular tracks for rolling bodies of the outer ring; each flat carries integrally a sensor module including a pair of extensometers positioned parallel to each other and each at the position of a respective annular track, orientated in a circumferential direction so as to extend along a circumferential development of the annular track; an electrical circuit picks up a signal from each sensor module and sends it to a data socket carried by the suspension upright or knuckle.

The invention discloses a bolt connection interface micro-motion friction wear test device, which comprises an excitation system, a measurement system and a sample and support system, wherein the sample and support system comprises a bolt connection sample, a flexible guide plate, an outer support frame and a base; the excitation system comprises a piezoelectric actuator, a signal generator, a power amplifier, a knob and a force transferring ball; and the measurement system comprises a support block, a dynamic force sensor, a ring dynamic force sensor, a laser vibrometer, an optical lens, anda data collector. By using the piezoelectric actuator-driven closed-loop controlled high-precision bolt interface friction wear test device, broadband excitation, closed-loop control and precision optical displacement measurement are considered at the same time, friction wear test under various working conditions can be realized, and expansion to other connection forms and samples is easy. Besides, the device also has multiple protective measures to avoid equipment damage.

The invention discloses a storage battery charging device. The storage battery charging device comprises a phase-controlled rectification circuit, a filter circuit and an electric current reversing protective circuit, wherein the phase-controlled rectification circuit is connected with an external alternating current power supply and used for converting alternating current which is output by the external alternating current power supply to direct current, the phase-controlled rectification circuit adjusts output direct current according to obtained storage battery charging signals and a preset electric current curve, the filter circuit is connected with the phase-controlled rectification circuit and used for filtering the direct current, and the electric current reversing protective circuit is arranged between a storage battery and the filter circuit in a connecting mode and used for preventing electric current which is output by the storage battery from reversing to the filter circuit. By means of the storage battery charging device, the storage battery can be rapidly charged up, safety and reliability of the charging process can be guaranteed, meanwhile, control speed and control accuracy of a system can be greatly improved, high-accuracy high-stability control over strong electricity is achieved, and thereby, high requirements of a diesel locomotive for a control system under poor operating conditions can be met.

A method for operating an electronic brake system in a vehicle having at least two tires on an axle, wherein the vehicle has a center of gravity (SP) with a height (hSP), is disclosed. According to the method, the height (hSP) of the center of gravity (SP) is calculated and used as a parameter by the electronic brake system. An electronic control unit, an electronic brake system, and a vehicle including the same for carrying out the method are also disclosed.

The invention provides a miniaturized design method of a pulsed light system capable of generating stable power. The pulse light output with stable power is realized based on the combined action of asignal source, an acousto-optic modulator, a PID controller, and a digital signal and an analog signal driven by the PID controller. A light beam quality analyzer is used for testing a light source, modeling simulation is conducted on the light source based on the Scheme macro language of Tracepro software and the function of a surface light source generator, and the establishment of a replacementlight source is achieved; based on the design of an aspheric lens and a free-form surface focusing lens, the separation of first-order diffracted light and zero-order diffracted light is achieved, and the first-order diffracted light is focused and made to enter a photoelectric detector. The method can meet the requirements of a pumping laser system and a detection laser system for pulsed light and a high-stability light power system of the pulsed light, and the miniaturized design lays a foundation for engineering application. The method provided by the invention can be applied to pulsed light systems in the extremely weak magnetic detection fields of inertial measurement devices, magnetometers, gyroscopes and the like and other related fields.