47 results about "Wave variables" patented technology

The invention relates to a 14-bit width image compression hardware coder which can be used for reducing the storage space and transmission bandwidth required for recording and transmitting high bit width image with 8-14 bits and is developed based on a small wave image compression algorithm with low complexity. The coder comprises the modules as follows: an overall situation state machine controller, four data path gates, four data caches A, B, C and D, an image buffer, a first-stage small wave driver, a second-stage small wave driver, a third-stage small wave driver, a two-dimensional predicator, a two-dimensional small wave variable engine, a data transfer device, an optimization quantizer, a self-adaptive zero-course coder and an index Columbus coder. All the modules are organically combined for parallel processing, thereby realizing high-speed and high-bit width image compression with higher image quality. The real-time compression of a high-bit width camera image can remarkably reduce the image data amount, the storage volume and the requirements for transmission bandwidth.

The invention discloses a four-way teleoperation bilateral control method based on time delay compensation. Based on a traditional four-way bilateral control method, by establishing a master-slave endkinetic model and additionally adopting a time delay compensation communication channel, the system stability is ensured, and the system transparency is improved substantially. To solve the problem that a traditional four-way bilateral control method has a destabilization phenomenon on the correspondence time delay condition, a correction wave variable method based on the passive theory is provided, so that the influence on the system transparency by wave reflection of a traditional wave variable is reduced, and the realistic degrees of position tracking performance and force feedback in theteleoperation process are ensured. The stability of a teleoperation system on the time delay condition can be ensured very well, and at the same time, the realistic degrees of the position tracking performance and the force feedback of the slave end are improved. The four-way teleoperation bilateral control method is easy to implement, and can be mainly used for bilateral control on the teleoperation system, and the stability and transparency of the teleoperation system are ensured.

The invention discloses a stability control method for a time-delay asymmetric double-teleoperation system. The method is characterized by, to begin with, establishing a model of the asymmetric double-teleoperation system; then, designing wave variables; and finally, establishing a time delay model. According to the method, speed and force information is converted into the wave variables and then, are transmitted; according to the passivity theory, passivity of channels under any fixed time delay condition can be ensured, and passivity of the double-teleoperation system under any fixed time delay condition can be ensured; and wave transform can be realized only by carrying out simple arithmetic operation on the speed and force information, and the method is easy to realize. Finally, the method can ensure the passivity of the channels under any fixed time delay condition; and master ends, a slave end and an environmental model are passive, so that passivity and stability of the whole system under any fixed time delay condition can be ensured.

The invention relates to a high-power pseudo-spark switch tube for power electronic pulse conversion, belonging to the technical field of a gas power electronic switch device. The high-power pseudo-spark switch tube comprises a main electrode, a trigger electron gun, a hydrogen storage unit, a sealing tube body and an outer circuit, wherein the main electrode comprises a first anode and a second anode; the first anode and second anode are closed at the two ends, leave each other for certain distance and are coaxial hollow cylinders; the trigger electron gun comprises a tubular cathode, a tungsten heating wire, an outer tube and a trigger electrode, and is arranged below the main electrode while the muzzle of the electron gun is aligned with an electron injection hole of the second anode; titanium hydride powder is arranged in the hydrogen storage unit, and the heating wire is spirally wound on the surface; and the outer circuit comprises a main power supply and load thereof, a triggerpower supply and a voltage division resistor thereof, a heating wire power supply and an electronic switch. According to the invention, the on / off of the main electrode is realized through the pseudo-spark discharge between two anodes; and the high-power pseudo-spark switch tube has the advantages of high withstand voltage, large on current, high repeat switch frequency, low on voltage drop and the like, is easy to conduct by trigger, allows short circuit of an output end, and is suitable for being used as a main switch element in an indirect type constant-energy pulse chopped-wave variable-frequency speed control system.

The invention discloses an improved wave variable method in a bilateral remote operating system. The bilateral remote operating system comprises an operator, a main end, a communication link, a slaveend and an environment. In the communication link, an improved wave variable transformation is performed, an adjustable additional wave impedance coefficient is added during a transformation process,and a relationship among the improved wave variable, a position variable and a force variable is obtained. Through the improved wave variable method, under the condition of ensuring the stability of the bilateral remote operating system, operational performance of the system is improved, and a force / position tracking error is reduced.

The invention relates to a 14-bit width image compression hardware coder which can be used for reducing the storage space and transmission bandwidth required for recording and transmitting high bit width image with 8-14 bits and is developed based on a small wave image compression algorithm with low complexity. The coder comprises the modules as follows: an overall situation state machine controller, four data path gates, four data caches A, B, C and D, an image buffer, a first-stage small wave driver, a second-stage small wave driver, a third-stage small wave driver, a two-dimensional predicator, a two-dimensional small wave variable engine, a data transfer device, an optimization quantizer, a self-adaptive zero-course coder and an index Columbus coder. All the modules are organically combined for parallel processing, thereby realizing high-speed and high-bit width image compression with higher image quality. The real-time compression of a high-bit width camera image can remarkably reduce the image data amount, the storage volume and the requirements for transmission bandwidth.

The invention discloses a fixed time delay teleoperation control method based on a wave variable. A dynamical model and a time delay model of a master-slave terminal are established, a forward channel wave variable compensation term is designed, a backward channel wave variable compensation term is designed and finally an energy setting device is designed so that a problem of stability caused by time delay in teleoperation can be solved, and tracking performance and force feedback fidelity in the teleoperation process can be enhanced. Stability of a teleoperation system under the condition of fixed time delay can be greatly guaranteed so that the method has great position tracking performance and great force feedback fidelity. According to the teleoperation control method, stability of the teleoperation system under the condition of time delay can be guaranteed through a wave variable method, and position and force tracking performance of the time delay teleoperation system can also be enhanced.

The invention discloses a series resonance voltage-withstanding partial-discharge test method utilizing frequency modulation phase shift, and relates to alternating current voltage-withstanding and partial-discharge test of electrical equipment. According to the series resonance voltage-withstanding partial-discharge test method utilizing frequency modulation phase shift, a frequency modulation series resonance voltage-withstanding partial-discharge test system composed of a rectangular wave variable-frequency power source, a resonant electric reactor, a partial-discharge instrument and the like is utilized, excitation voltage frequency is down-regulated when a resonance voltage reaches a set value of the test voltage, the system deviates from the resonant state and produces phase shift, four burrs (namely interference signals) formed on a time base of the partial-discharge instrument when a variable-frequency power source switching tube is switched on and switched off are moved to second and fourth quadrants rightwards from positions distributed on two edges of + / - 90 degrees, the excitation voltage pulse width is increased to enable the resonance voltage to reach the set value of the test voltage again, and then windows can be opened at first and third quadrants for partial discharge test of tested products. By means of the series resonance voltage-withstanding partial-discharge test method, interference on the partial-discharge test, caused by variable-frequency power source switching pulses, is avoided, the fact that people doubt whether windowing or blanking eliminates the partial discharge of the tested products is avoided, and therefore the reliable and high-efficiency rectangular wave variable-frequency power source is used for the voltage-withstanding partial-discharge test of various kinds of electrical equipment.