Aim In accordance with the positioning control for valve controlled motor electrohydraulic proportional servo systems driving the static load torque, the positioning performance was studied in the presence of the ti...Aim In accordance with the positioning control for valve controlled motor electrohydraulic proportional servo systems driving the static load torque, the positioning performance was studied in the presence of the time? varying deadzone and gain. Methods The large positioning errors caused by the time varying deadzone were significantly reduced by using the dynamic compensation method for the deadzone; and the large overshoot caused by the time varying gain were dramatically reduced by using the three section intelligent control schemes. Results Experimental results demonstrated that the positioning performance of rapid response, high accuracy and smaller or even no overshoot was achieved under a wide variations of load torque. Conclusion The good positioning performance for valve controlled motor servo systems has been achieved in the presence of the time varying deadzone and gain.展开更多
For the advanced tokamak,the particle deposition and thermal load on the divertor is a big challenge.By moving the strike points on divertor target plates,the position of particle deposition and thermal load can be sh...For the advanced tokamak,the particle deposition and thermal load on the divertor is a big challenge.By moving the strike points on divertor target plates,the position of particle deposition and thermal load can be shifted.We could adjust the Poloidal Field（PF） coil current to achieve the strike point position feedback control.Using isoflux control method,the strike point position can be controlled by controlling the X point position.On the basis of experimental data,we establish relational expressions between X point position and strike point position.Benchmark experiments are carried out to validate the correctness and robustness of the control methods.The strike point position is successfully controlled following our command in the EAST operation.展开更多
The intelligent fuzing is a kind of perfect way to optimize detonation location.The fuze can autonomously configure the warhead detonation mode to optimize the desired effects against the target.For the air target,the...The intelligent fuzing is a kind of perfect way to optimize detonation location.The fuze can autonomously configure the warhead detonation mode to optimize the desired effects against the target.For the air target,the fuze can sense the impact in the impact mode then detonate the warhead on impact,otherwise,it will operate in the proximity mode and detonate at a closest approach to the target.The anti-jamming ability is also added on fuze＇s full digital signal processing platform.The method for burst point＇s controlling is analyzed and the digital intelligent fuze system based on system on programmable chip（SOPC） is designed.展开更多
文摘Aim In accordance with the positioning control for valve controlled motor electrohydraulic proportional servo systems driving the static load torque, the positioning performance was studied in the presence of the time? varying deadzone and gain. Methods The large positioning errors caused by the time varying deadzone were significantly reduced by using the dynamic compensation method for the deadzone; and the large overshoot caused by the time varying gain were dramatically reduced by using the three section intelligent control schemes. Results Experimental results demonstrated that the positioning performance of rapid response, high accuracy and smaller or even no overshoot was achieved under a wide variations of load torque. Conclusion The good positioning performance for valve controlled motor servo systems has been achieved in the presence of the time varying deadzone and gain.
基金supported by the National Magnetic Confinement Fusion Science Program of China(Nos.2012GB105000 and 2014GB103000)
文摘For the advanced tokamak,the particle deposition and thermal load on the divertor is a big challenge.By moving the strike points on divertor target plates,the position of particle deposition and thermal load can be shifted.We could adjust the Poloidal Field（PF） coil current to achieve the strike point position feedback control.Using isoflux control method,the strike point position can be controlled by controlling the X point position.On the basis of experimental data,we establish relational expressions between X point position and strike point position.Benchmark experiments are carried out to validate the correctness and robustness of the control methods.The strike point position is successfully controlled following our command in the EAST operation.
文摘The intelligent fuzing is a kind of perfect way to optimize detonation location.The fuze can autonomously configure the warhead detonation mode to optimize the desired effects against the target.For the air target,the fuze can sense the impact in the impact mode then detonate the warhead on impact,otherwise,it will operate in the proximity mode and detonate at a closest approach to the target.The anti-jamming ability is also added on fuze＇s full digital signal processing platform.The method for burst point＇s controlling is analyzed and the digital intelligent fuze system based on system on programmable chip（SOPC） is designed.
