The ABS Control Strategy And Digital Simulation Of Hydraulic Disc Brake

The winch is a major component of the workover rig, drum winding the wire rope and lifting equipment to enhance decentralization to heavy objects, bear the load lifting and decentralization in the workover rig winch hydraulic disc brake and the braking performance of petroleum operations on the safety of the workover rig plays a vital role. Hydraulic disc brake of workover rig hoisting system is a caliper disc structure, brake disc and brake clamp equipped with brake block to act brake apparatus of brake coupled parts. Calipers by the movement of the hydraulic cylinder piston to clamp or release the brakes to brake or loose brake, with brake torque capacity, braking performance and stability, and resistance to recession performance, brake sensitivity and effortless operation, replacement and easy maintenance, easy to professional, serial production, domestic and international industrial sectors are regarded as advanced braking technology and research and development in the past20years has been widely used in the drilling rig and workover rig. Hydraulic disc brake on the introduction of ABS technology can greatly improve the handling and stability of the hydraulic disc brake in the brake, shorten the braking time and braking distance, reducing the impact of load on the lifting system, hydraulic disc brake in bit pressure and drilling rate adjustment process there are also the target control of large fluctuations in response to lag the poor of the operating handle, process characteristics and control strategies for further research. Hydraulic disc brake and ABS is an important installations of the workover rig winch drum, workover rig hydraulic disc brake and hydraulic control system of a subsystem, which combines the application of liquid (gas) pressure transmission technology, electronics, servo control technology and materials science and technology, Achieve full use of the calipers to the friction of the brakes, the new results of the application of control theory-depth study of the hydraulic disc brake and ABS, design high-performance disc brake system, safe, reliable, and quickly absorb the brakes the rotational kinetic energy, workover rig from the drilling brake safety plays an important role. Affect the hydraulic disc brake and ABS performance factors very important factor is the disc brake brake system controller involving a relatively small, which requires further research on the ABS control method.This paper analyzes the XJ250workover rig hydraulic disc brake system in the course of its operations in the brake, parking brake and emergency brake, three typical braking condition, impose PRO/ENGINEER solid model of the brakes and fricition plate, and the brakes were mechanical analysis, simplification and dynamic analysis of lifting systems, to enhance the dynamic model of the system conditions, the lifting and down into the condition, disc brake dynamic differential equations, and laid the foundation for later research.In-depth analysis of the basic structure and working principle of the anti-lock braking system on the basis of the existing ABS control strategy in the automotive and aircraft applications made research and analysis, today, the ABS brake systems for vehicles and aircraft control strategy is more mature, the ABS into a workover rig hydraulic disc brake system is feasible and effective, but disc brakes ABS control strategy involves less. the papers for the study of the hydraulic disc brake and ABS control strategy, the proposed sliding mode variable structure control methods and real-time parameter tuning PID control method the application of simulation in hydraulic disc brake and ABS system.Based on the workover rig hydraulic disc brake system operating in typical operating conditions, the establishment of the brake system simulation model, one with ABS sliding mode variable structure control method, the design of sliding mode variable structure controller simulation, the lifting system into the working conditions under braking, simulation results show that the sliding mode variable structure control method can flutter suppression system at the same time shorten the response time; and the other proposed real-time parameter tuning PID parameters according to the operating conditions of the hydraulic disc brake system, PID controller parameters with the working conditions, simulation results show that line the entire set the ABS PID control method can effectively suppress the overshoot, control, the ABS tracking working conditions change.XJ250workover rig hoisting system is a typical machine, electrical, fluid integration of control systems to facilitate the analysis of its control characteristics, muti-domain modeling and co-simulation. This article is based on the ADAMS software to establish the dynamic model of the hydraulic disc brake and brake discs, ABS, variable structure control and PID control method in the disc brake, and mechanical and electrical co-simulation using ADAMS and MATLAB/Simulink, the simulation results show that the co-simulation enables simulation efficiency, the ABS changed the structure and PID control of a combination controller can control the slip ratio changes, so that the slip rate is maintained at near optimum slip ratio, so that the lifting system brakes disk speed change is relatively stable, to ensure the stability requirements in the process of hydraulic disc brake.