Cyclic/collective pitch mixing (CCPM) is a control concept employed in collective pitch radio-controlled helicopters.[1] CCPM reduces mechanical complexity and increases precision of control of the helicopter rotor's swashplate. Unlike conventional systems in which a single actuator is responsible for a single axis, CCPM mechanisms allow multiple actuators to work together to manipulate all axis of control.
Older model helicopters use three independent servos to manipulate the swashplate. The elevator servo is used to tilt the swashplate forward and aft (longitudinal cyclic), varying the aircraft's pitch. The aileron servo is used to tilt the swashplate left and right (lateral cyclic), varying the aircraft's roll. The collective pitch servo raises and lowers the entire swashplate, varying the collective, and hence the pitch of all the rotor blades collectively. An intermediate mechanical mixing system is used to transfer the control inputs from the servos to the swashplate, therefore the name of mechanical CCPM (mCCPM).[2] This requires an elaborate system of control rods and levers, which often contains many ball bearings.
Electronic mixingedit
To reduce the mechanical complexity, newer model helicopters use a software system (usually running on the transmitter) to mix the control inputs of three interdependent servos to control the swashplate.[2] The three servo linkages are arranged around the swashplate at 120° intervals (there is a variation that uses 140° + 140° + 80° intervals). In addition to lower mechanical complexity, the interdependent servos share the workload.
An evolution of electronic mixing is the advent of flight controllers, otherwise known as "flybarless systems".[3] Flybarless systems provide two key benefits to model helicopters. By removing the mechanical flybar from the rotorhead, there is less mass and lower aerodynamic drag resulting in improved efficiency. The accelerometers in the flybarless system also provide electronic stabilisation, allowing for finer levels of tuning and greater flight characteristics.[4]
cyclic, collective, pitch, mixing, ccpm, control, concept, employed, collective, pitch, radio, controlled, helicopters, ccpm, reduces, mechanical, complexity, increases, precision, control, helicopter, rotor, swashplate, unlike, conventional, systems, which, s. Cyclic collective pitch mixing CCPM is a control concept employed in collective pitch radio controlled helicopters 1 CCPM reduces mechanical complexity and increases precision of control of the helicopter rotor s swashplate Unlike conventional systems in which a single actuator is responsible for a single axis CCPM mechanisms allow multiple actuators to work together to manipulate all axis of control Contents 1 Conventional operation 2 Electronic mixing 3 See also 4 References 5 External linksConventional operation editOlder model helicopters use three independent servos to manipulate the swashplate The elevator servo is used to tilt the swashplate forward and aft longitudinal cyclic varying the aircraft s pitch The aileron servo is used to tilt the swashplate left and right lateral cyclic varying the aircraft s roll The collective pitch servo raises and lowers the entire swashplate varying the collective and hence the pitch of all the rotor blades collectively An intermediate mechanical mixing system is used to transfer the control inputs from the servos to the swashplate therefore the name of mechanical CCPM mCCPM 2 This requires an elaborate system of control rods and levers which often contains many ball bearings Electronic mixing editTo reduce the mechanical complexity newer model helicopters use a software system usually running on the transmitter to mix the control inputs of three interdependent servos to control the swashplate 2 The three servo linkages are arranged around the swashplate at 120 intervals there is a variation that uses 140 140 80 intervals In addition to lower mechanical complexity the interdependent servos share the workload An evolution of electronic mixing is the advent of flight controllers otherwise known as flybarless systems 3 Flybarless systems provide two key benefits to model helicopters By removing the mechanical flybar from the rotorhead there is less mass and lower aerodynamic drag resulting in improved efficiency The accelerometers in the flybarless system also provide electronic stabilisation allowing for finer levels of tuning and greater flight characteristics 4 See also editAnatomy of a helicopter Helicopter flight controls Aeronautical engineeringReferences edit What is CCPM and why it s so important Retrieved 28 October 2014 a b What is the deal with mCCPM and eCCPM Archived from the original on 5 March 2016 Retrieved 23 October 2019 Understanding Flybarless RC Helicopters amp FBL Systems Controllers RCHelicopterFun com Retrieved 2022 03 17 Best Flybarless System Is There Such A Thing RCHelicopterFun com Retrieved 2022 03 17 External links editRC Heli Flight School nbsp This article on an unmanned aerial vehicle is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Cyclic collective pitch mixing amp oldid 1077755425, wikipedia, wiki, book, books, library,
